\m 19 6 89 2 1 'Introduction' \m 56 19 64 3 1 'Summary of Insecticide Registrations' \m 151 52 16 5 1 'Specific Pests and Recommended Control' \m 152 52 63 5 2 'Gnats' \m 174 61 11 5 2 'Cattle Grubs' \m 216 79 12 6 2 'Horn Flies' \m 373 148 27 9 2 'House Flies' \m 407 162 6 10 2 'Lice' \m 559 227 113 12 2 'Mange' \m 573 232 68 13 2 'Mosquitoes' \m 595 242 12 13 2 'Screwworms' \m 615 250 83 14 2 'Stable Flies' \m 673 275 127 15 2 'Ticks' \m 750 310 97 16 1 'House Fly Control in the Milk Room' \t'November 1987' 'II C-' \a Dr. Phil Koehler, Extension Entomologist \a \a EXTERNAL PARASITE CONTROL RECOMMENDATIONS FOR DAIRY CATTLE \h 1 'Introduction' Dr. Phil Koehler, Extension Entomologist EXTERNAL PARASITE CONTROL RECOMMENDATIONS FOR DAIRY CATTLE Introduction Keys to pesticide safety: 1. Before using any pesticide, stop and read the precautions. 2. Read the label on each pesticide container before each use. Heed all warnings and precautions. 3. Store all pesticides in their original containers away from food or feed. 4. Keep pesticides out of the reach of children, pets and livestock. 5. Apply pesticides only as directed. 6. Dispose of empty containers promptly and safely. Recommendations in this guide are for guidelines only. The user must insure that the pesticide is applied in strict compliance with label directions. The Food and Drug Administration has established residue tolerances for certain insecticides in the meat of certain animals. When these and other approved insecticides are applied according to recommendations, the pests should be effectively controlled and the animals' products will be safe for food. The improper use of insecticides may result in residue in milk or meat. Such products must not be delivered to processing plants. To avoid excessive residues, use the insecticides recommended at the time recommended and in the amounts recommended. The use of trade names is solely for the purpose of providing specific information. It is not a guarantee or warranty of the products named and does not signify that they are approved to the exclusion of others. \b\v \h 1 'Summary of Insecticide Registrations' \v \v \v Summary of Insecticide Registrations: ------------------------------------------------------------------------------- Min. Days From Last Pests on Which Pesticide Application to Insecticide Formulation is Registered for Use Freshening ------------------------------------------------------------------------------- chlorpyrifos ear tag hornflies 0 (not for (Terminator) lactating animals) coumaphos (Co-Ral) pour-on cattle grubs 14 spray cattle grubs, screwworms, 14 ticks spray horn flies, lice 0 dust bag cattle grubs, lice 0 backrubber horn flies 14 crotoxyphos + spray horn flies, lice, 0 dichlorvos (Ciodrin stable flies, ticks + Vapona) mist horn flies, lice, stable flies 0 backrubber horn flies 0 dichlorvos (Vapona) mist horn flies, mosquitoes, 0 stable flies famphur (Warbex) pour-on cattle grubs, lice 21 fenthion (Tiguvon) pour-on cattle grubs 28 fenvalerate (Ectrin) ear tag horn flies, house flies, 0 stable flies, ticks flucythrinate ear tag horn flies, house flies, 0 stable flies, lice, ticks malathion dust horn flies, lice, ticks 0 spray horn flies, lice, ticks 14 backrubber horn flies, lice 14 malathion + dust horn flies, lice, ticks 0 methoxychlor \p (cont'd) \b\pSummary of Insecticide Registrations - cont'd \p----------------------------------------------------------------------------- \p Min. Days \p From Last \p Pests on Which Pesticide Application to \pInsecticide Formulation is Registered for Use Freshening \p----------------------------------------------------------------------------- methoxychlor dust horn flies, lice 0 spray horn flies, lice 14 permethrin (Atroban, spray horn flies, house flies 0 Ectiban, Permectrin) ear tag horn flies, house flies, 0 stable flies dust horn flies, lice 0 pour-on horn flies, lice, house flies, 0 stable flies phosmet (Prolate) spray horn flies, lice, mange, ticks 28 pyrethrins mist gnats, horn flies, house flies, 0 (Synergized) lice, stable flies stirofos (Rabon) dust horn flies, lice 0 dust bag horn flies, lice 0 stirofos + spray lice 0 dichlorvos (Rabon + Vapona) trichlorfon pour-on gnats, lice 7 (Neguvon) ------------------------------------------------------------------------------- \b\v \h 1 'Specific Pests and Recommended Control' \h 2 'Gnats' \v \v \v Specific Pests of Dairy Cattle and Recommended Control: Gnats Below, Min. Days refers to minimum days from last application to freshening. ------------------------------------------------------------------------------- Min. Formula- Insecticide Days tion Application Directions ------------------------------------------------------------------------------- synergized 0 mist Ready to use - 1-2 oz. per animal. pyrethrum Apply once daily, preferably in the morning for 3 days, then repeat every 2 days as necessary. Avoid areas around eyes and mouth. Mist not to exceed 2 oz. per animal. SAFETY RESTRICTIONS: Wash teats and udder before milking. ------------------------------------------------------------------------------- \h 2 'Cattle Grubs' Cattle Grubs There is no treatment for cattle grubs on lactating cattle. The insecticides below do not apply to lactating animals. Below, Min. Days refers to minimum days from last application to freshening. ------------------------------------------------------------------------------- Min. Formula- Insecticide Days tion Application Directions ------------------------------------------------------------------------------- coumaphos 14 4% pour-on 1/2 fl. oz. per 100 lb. of animal weight (Co-Ral) Pour correct amount on animal's back. 14 spray 12-16 lb. 25% WP per 100 gal. water; 12 qt. of 11.6% EC in 100 gal. water. Apply as coarse spray to thoroughly wet animal. See directions for timing of applications. Apply 2 times per season. SAFETY RESTRICTIONS: Do not treat lactating animals, animals less than 3 mo. old, or sick and stressed stock. famphur 21 13.2% Apply 1 oz. per 200 lb. of body weight (Warbex) pour-on from shoulder to tail head. SAFETY RESTRICTIONS: Do not apply to lactating dairy animals. fenthion 28 3% Do not re-apply within 35 days of (Tiguvon) pour-on first treatment. SAFETY RESTRICTIONS: Do not apply to lactating dairy animals. trichlorfon 7 8% 1/2 oz. per 100 lb. of animal weight. pour-on Pour on back of animals. Do not exceed 4 oz. per animal. SAFETY RESTRICTIONS: Do not apply to lactating dairy animals. ------------------------------------------------------------------------------- \b\v \h 2 'Horn Flies' \v \v Horn Flies Below, Min. Days refers to minimum days from last application to freshening. ------------------------------------------------------------------------------- Min. Formula- Insecticide Days tion Application Directions ------------------------------------------------------------------------------- chlorpyrifos 0 ear tag See label for directions. (Terminator) SAFETY RESTRICTIONS: Not for use on lactating animals. coumaphos 0 spray 1 qt. of 11.6% EC in 100 gal. of water. (Co-Ral) Spray for complete wetting. Repeat as necessary. SAFETY RESTRICTIONS: Do not treat lactating animals, animals less than 3 mo. old or sick and stressed stock. 14 0.06% 2 lb. of 25% WP per 100 gal. of water. spray Apply as coarse spray to thoroughly wet animal. 2 qt. of 11.6% EC in 100 gal. water. Apply as coarse spray for complete wetting to run-off. Repeat as necessary. 14 back- Mix 4 qt. of 11.6% EC in 13 gal. rubber diesel oil or mineral oil. Saturate backrubber as needed. crotoxyphos 0 0.5% 1 gal. of 10% + 75% EC in 24 gal. of + dichlorvos spray water. Apply 1-2 qt. spray per animal. (Ciodrin SAFETY RESTRICTIONS: Repeat as necessary + Vapona) but not more often than once every 7 days. 0 1.0% 1 gal. of 10% + 2.5% EC in 12 gal. of spray water. Apply 1-2 pt. per animal. crotoxyphos 0 1.0% 1 gal. of 10% + 2.5% EC in 12 gal. of + dichlorvos water water. Mist with electric mister or low (Ciodrin pressure sprayer. + Vapona) SAFETY RESTRICTIONS: Do not exceed 2 oz. per animal. 0 1% back- 1 gal. of 10% + 2.5% EC in 16 gal. of oil. rubber Keep backrubber saturated. dichlorvos 0 1% mist Mix 1 gal. of 23.4% EC in 25 gal. of (Vapona) water. Apply 1-2 fl. oz. per animal as a mist daily. Ready-to-use: Apply 1-2 fl. oz per animal as a mist daily. fenvalerate 0 ear tag Apply tags to animals and retreat as (Ectrin) necessary. SAFETY RESTRICTIONS: Do not treat calves less than 5-6 mo. old due to possible ear deformity. \p (cont'd) \b\pHorn Flies - cont'd \p------------------------------------------------------------------------------ \p Min. Formula- \pInsecticide Days tion Application Directions \p------------------------------------------------------------------------------ flucythrinate 0 7.5% ear tag Apply ear tags to animal and re-treat as necessary. SAFETY RESTRICTIONS: Do not treat calves less than 5-6 months old due to possible ear deformities. malathion 0 4% dust 4 tbsp per animal. Sprinkle on neck, back, and upper sides. Effective for approximately 10-14 days. 0 5% dust 3 tbsp per animal. Sprinkle on neck, back, and upper sides. Effective for approximately 10-14 days. SAFETY RESTRICTIONS: Do not apply within 5 hours of milking. Do not treat animals under 1 mo. of age. 14 2% back- 2% mixture in fuel oil according to rubber label. One backrubber to every 35-45 animals. Saturate backrubber every 2-3 weeks. SAFETY RESTRICTIONS: Do not apply to lactating animals. 14 0.6% - 0.8% 6.5 - 10 oz. of 57% EC per 5 gal. spray water - or 1-1.5 gal. per 100 gal. water. Complete coverage spray. Repeat at 14 day intervals if needed. 14 0.5% - 0.7% 16 - 24 lb. of 25% WP per 100 gal. spray water. Repeat every 2-3 weeks if needed. SAFETY RESTRICTIONS: Do not apply to lactating animals. Do not apply to animals under 1 mo. of age. malathion + 0 dust See label for directions. methoxychlor methoxychlor 0 50% WP One tbsp. per animal. Sprinkle on neck, back and upper sides. Repeat every 3 wks. 14 0.5% spray 1 gal. of 2 EC per 50 gal. water. Com- plete coverage spray. Repeat every 3 wk; 2 lb. of 50% WP per 25 gal. water. Complete coverage spray. Repeat every 3 wk. May be used as a dip. SAFETY RESTRICTIONS: Do not apply to lactating animals as spray or dip. Do not dip calves under 1 mo. of age. \p (cont'd) \b\pHorn Flies - cont'd \p------------------------------------------------------------------------------ \p Min. Formula- \pInsecticide Days tion Application Directions \p------------------------------------------------------------------------------ permethrin 0 backrubber Mix in diesel oil according to label directions. Keep rubbing device charged. Results improve by daily forced use. 0 ear tag Apply tags to animals and retreat as necessary. 0 spray Mix according to directions on label in water. Spray entire animal thor- oughly. 0 1% pour-on See directions on label. 0 0.25% dust See directions on label. phosmet 28 spray Mix 1 gal to 200 gal water. Apply (Prolate) 1-2 qts per animal. stirofos 0 3% dust bag Ready to use dust bag for free choice (Rabon) or forced use. Hang in animals' exits from buildings. 0 3% dust Hand dusting - 2 oz. per animal. Apply to neck, back and upper sides. Repeat as necessary. synergized 0 .1% spray Mist ready to use - 1 oz. per animal. pyrethrum mist Apply once daily, preferably in the morning for 3 days, then repeat every 2 days as necessary. Avoid areas around eyes and mouth. Mist not to exceed 2 oz. per animal. SAFETY RESTRICTIONS: Wash teats and udder before milking. ------------------------------------------------------------------------------- \b\v \h 2 'House Flies' \v \v House Flies Below, Min. Days refers to minimum days from last application to freshening. ------------------------------------------------------------------------------ Min. Formula- Insecticide Days tion Application Directions ------------------------------------------------------------------------------- fenvalerate 0 ear tag Apply tags to animal and retreat as (Ectrin) necessary. SAFETY RESTRICTIONS: Do not treat calves less than 5-6 mo. old due to possible ear deformity. flucythrinate 0 7.5% ear tag Apply ear tags to animal and re-treat as necessary. SAFETY RESTRICTIONS: Do not treat calves less than 5-6 months old due to possible ear deformities. permethrin 0 ear tag 2S Apply tags to animal and retreat as necessary. 0 1% pour-on See directions on label. synergized 0 mist Ready-to-use - 1-2 oz. per animal. Apply pyrethrum once daily, preferably in the morning for 3 days, then repeat every 2 days as necessary. Avoid areas around eyes and mouth. Mist not to exceed 2 oz. per animal. ------------------------------------------------------------------------------- \b\v \h 2 'Lice' \v \v Lice Below, Min. Days refers to minimum days from last application to freshening. ------------------------------------------------------------------------------- Min. Formula- Insecticide Days tion Application Directions ------------------------------------------------------------------------------- coumaphos 14 0.06% spray 2 lb. of 25% WP per 100 gal. water. (Co-Ral) Apply as a coarse spray to thoroughly wet animal. SAFETY RESTRICTIONS: Do not treat lactating animals, animals less than 3 mo. old, or sick and stressed stock. coumaphos 14 0.06% spray 2 qt. of 11.6% EC in 100 gal. water. (Co-Ral) Apply as a coarse spray for complete wetting to run-off. Repeat as necessary. SAFETY RESTRICTIONS: Do not apply to lactating animals, animals less than 3 mo. old, or sick and stressed stock. 0 0.03% spray 1 qt. of 11.6% EC in 100 gal. water. Spray for complete wetting. Repeat as necessary. 0 0.03% spray 1 lb. of 25% WP per 100 gal. water. Apply as a coarse spray for complete wetting. 0 dust bag Ready to use. crotoxyphos 0 0.25% spray 1 gal. of 10% + 2.5% EC in 48 gal. of + dichlorvos water. Apply one gal. per animal then (Ciodrin repeat as necessary but not more often + Vapona) than every 7 days. crotoxyphos 0 1% mist Ready to use. Make 1-2 applications at + dichlorvos 14 day intervals. (Ciodrin + Vapona) famphur 2 13.2% Apply 1 oz. to 13.2% per 200 lb. body (Warbex) pour-on weight from shoulder to tail head. SAFETY RESTRICTIONS: Do not apply to lactating dairy animals. flucythrinate 0 7.5% ear tag Apply ear tags to animal and re-treat as necessary. SAFETY RESTRICTIONS: Do not treat calves less than 5-6 months old due to possible ear deformities. \p (cont'd) \b\pLice - cont'd \p------------------------------------------------------------------------------ \p Min. Formula- \pInsecticide Days tion Application Directions \p------------------------------------------------------------------------------ malathion 0 4% dust 4 tbsp. per animal. Sprinkle on neck, back, and upper sides. Effective for approximately 10-14 days. SAFETY RESTRICTIONS: Do not apply within 5 hours of milking. Do not treat animals under 1 mo. of age. 0 5% dust 3 tbsp. per animal. Sprinkle on neck, back, and upper sides. Effective for approximatley 10-14 days. 14 2% back- 2% mixture in fuel oil, according to rubber label. 1 backrubber to every 35-45 animals. Saturate backrubber every 2-3 weeks. SAFETY RESTRICTIONS: Do not apply to lactating animals. 14 0.6% spray 6.5 - 10 oz. of 57% EC in 5 gal. of water or 1-1.5 gal. of 57% EC per 100 gal. complete coverage water spray. Repeat at 14 day intervals if needed. SAFETY RESTRICTIONS: Do not apply to lactating animals. Do not apply to animals under 1 mo. of age. 14 0.5% spray 16-24 lb. of 25% WP per 100 gal. water. Repeat every 2-3 wk. if needed. SAFETY RESTRICTIONS: Do not apply to lactating animals. Do not apply to animals under 1 mo. of age. malathion + 0 dust See label for directions. methoxychlor methoxychlor 14 0.5% spray 1 gal. of 2 EC per 50 gal. of water. Complete coverage spray. Repeat every 3 wks. SAFETY RESTRICTIONS: Do not apply to lactating animals. 14 0.5% spray 2 lb. of 50% WP per 25 gal. of water complete coverage spray. Repeat every 3 wks. May be used as a dip. SAFETY RESTRICTONS: Do not apply to lactating animals. Do not dip calves under 1 mo. of age. 0 50% WP 1 tbsp. per animal. Sprinkle on neck, back, and upper sides. Repeat every 3 wks. \p (cont'd) \b\pLice - cont'd \p------------------------------------------------------------------------------ \p Min. Formula- \pInsecticide Days tion Application Directions \p------------------------------------------------------------------------------ permethrin 0 1% pour-on See directions on label. 0 0.25% dust See directions on label. phosmet 28 spray Mix 1 gal to 200 gal water. Apply (Prolate) 1-2 qts per animal. stirofos 0 3% dust Ready to use - 2 oz. per animal. (Rabon) stirofos 0 3% dust bag Ready to use for free choice or force (Rabon) use, etc. stirofos 0 0.35% spray 1 gal. of 23% + 5.7% EC in 75 gal. of + dichlorvos water. 1/2 to 1 gal. of spray per (Rabon animal. + Vapona) SAFETY RESTRICTIONS: Do not treat more often than every 10 days. synergized 0 mist Ready to use - 1-2 oz. per animal. pyrethrum Apply once daily, preferably in the morning for 3 days. Repeat as necessary not more frequently than once every 3 wk. Avoid areas around eyes and mouth. Mist not to exceed 2 oz. per animal. SAFETY RESTRICTIONS: Wash teats and udders before milking. trichlorfon 7 8% pour-on 1/2 oz. per 100 lb. of animal weight. (Neguvon) Pour on backs of animals. Do not exceed 4 oz. per animal. SAFETY RESTRICTIONS: Do not apply to lactating dairy animals. ------------------------------------------------------------------------------- \h 2 'Mange' Mange Below, Min. Days refers to minimum days from last application to freshening. ------------------------------------------------------------------------------- Min. Formula- Insecticide Days tion Application Directions ------------------------------------------------------------------------------- phosmet 28 spray Mix 1 gal to 200 gal water. Apply (Prolate) 1-2 qts per animal. ------------------------------------------------------------------------------- \b\v \h 2 'Mosquitoes' \v \v Mosquitoes Below, Min. Days refers to minimum days from last application to freshening. ------------------------------------------------------------------------------- Min. Formula- Insecticide Days tion Application Directions ------------------------------------------------------------------------------- dichlorvos 0 1% mist Mix 1 gal. of 25.4% EC in 25 gal. of (Vapona) water. Apply 1-2 fl. oz. per animal as a mist daily. Ready to use - Apply 1-2 fl. oz. per animal as a mist daily. synergized 0 mist Ready to use - 1-2 oz. per animal. pyrethrum Apply once daily, preferably in the morning for 3 days, then repeat every 2 days as necessary. Avoid areas around eyes and mouth. Mist not to exceed 2 oz. per animal. ------------------------------------------------------------------------------- \h 2 'Screwworms' Screwworm Below, Min. Days refers to minimum days from last application to freshening. ------------------------------------------------------------------------------- Min. Formula- Insecticide Days tion Application Directions ------------------------------------------------------------------------------- coumaphos 14 0.25% spray 8 lb. of 25% WP per 100 gal. of water. (Co-Ral) Apply as a coarse spray to thoroughly wet animal; 8 qt. of 11.6% EC in 100 gal. of water. Apply as a high pressure spray to wet skin. Repeat as necessary. SAFETY RESTRICTIONS: Do not treat lactating animals, animals less than 3 mo. old, or sick and stressed animals. ------------------------------------------------------------------------------- \b\v \h 2 'Stable Flies' \v \v Stable Flies Below, Min. Days refers to minimum days from last application to freshening. ------------------------------------------------------------------------------- Min. Formula- Insecticide Days tion Application Directions ------------------------------------------------------------------------------- crotoxyphos 0 0.5% spray Mix 1 gal. of 10% + 2.5% of EC in 24 + dichlorvos gal. of water. Apply 1-2 qt. per animal. (Ciodrin SAFETY RESTRICTIONS: Repeat not more + Vapona) than every 7 days. 0 1% mist Ready to use. Apply 1-2 oz. per animal daily, directing mist to legs. SAFETY RESTRICTIONS: Do not exceed 2 oz. per animal. dichlorvos 0 1% mist Ready to use. Apply 1-2 oz. per animal (Vapona) daily directing mist to legs. Mix 1 gal. 23.4% EC in 25 gal. water. Apply 1-2 oz. per animal daily directing mist to legs. SAFETY RESTRICTIONS: Do not exceed 2 oz. per animal. fenvalerate 0 ear tag Apply tags to animal and retreat as (Ectrin) necessary. SAFETY RESTRICTIONS: Do not treat calves less than 5-6 mo. old due to possible ear deformity. flucythrinate 0 7.5% ear tag Apply ear tags to animal and re-treat as necessary. SAFETY RESTRICTIONS: Do not treat calves less than 5-6 months old due to possible ear deformities. permethrin 0 ear tag Apply tags to animal and retreat as necessary. SAFETY RESTRICTIONS: Do not treat calves less than 5-6 mo. old due to possible ear deformity. 0 1% pour-on See directions on label. synergized 0 mist Ready to use. 1-2 oz. per animal. Apply pyrethrum once daily, preferably in the morning for 3 days, then repeat every 2 days as necessary. Avoid areas around eyes and mouth. Mist not to exceed 2 oz. per animal. SAFETY RESTRICTIONS: Wash teats and udders before milking. ------------------------------------------------------------------------------- \b\v \h 2 'Ticks' \v \v Ticks Below, Min. Days refers to minimum days from last application to freshening. ------------------------------------------------------------------------------- Min. Formula- Insecticide Days tion Application Directions ------------------------------------------------------------------------------- coumaphos 14 0.125% spray 4 lb. of 25% WP per 100 gal. of water. (Co-Ral) Apply as a coarse spray to thoroughly wet animal. 1 gal. of 11.6% EC in 100 gal. water. Apply as coarse spray for complete wetting to run-off. Repeat as necessary. SAFETY RESTRICTIONS: Do not treat lactating animals, animals less than 3 mo. old or sick and stressed stock. crotoxyphos 0 0.25% spray 1 gal. of 10% + 2.5% EC in 48 gal. of + dichlorvos water. Apply 1 gal. per animal. Second (Ciodrin application in 10-14 days. Then repeat + Vapona) as necessary, but not more often than every 7 days. fenvalerate 0 ear tag Apply tags to animals and retreat as (Ectrin) necessary. SAFETY RESTRICTIONS: Do not treat calves less than 5-6 mo. old due to possible ear deformity. flucythrinate 0 7.5% ear tag Apply ear tags to animal and re-treat as necessary. SAFETY RESTRICTIONS: Do not treat calves less than 5-6 months old due to possible ear deformities. malathion 0 4% dust 4 tbsp. per animal. Sprinkle on neck, back and upper sides. Effective for approximately 10-14 days. SAFETY RESTRICTIONS: Do not apply within 5 hours of milking. Do not treat animals under 1 mo. of age. 0 5% dust 3 tbsp. per animal. Sprinkle on neck, back and upper sides. Effective for approximately 10-14 days. SAFETY RESTRICTIONS: Do not apply within 5 hours of milking. Do not treat animals under 1 mo. of age. 14 0.5% - 1.0% 16 - 32 lb. of 25% WP per 100 gal. spray water; or 3/4 - 1 1/2 lb. per 5 gal. Repeat at 2 wk. intervals if needed. SAFETY RESTRICTIONS: Do not apply to lactating animals. \p (cont'd) \b\pTicks - cont'd \p------------------------------------------------------------------------------ \p Min. Formula- \pInsecticide Days tion Application Directions \p------------------------------------------------------------------------------ malathion 14 0.6% - 1.2% 1-2 gal. of 57% EC per 100 gal. water; spray or 6 1/2 - 13 oz. per 5 gal. Apply as complete coverage spray. Repeat at 2 wk. intervals if needed. SAFETY RESTRICTIONS: Do not apply to lactating animals. malathion + 0 dust See label for directions. methoxychlor phosmet 28 spray Mix 1 gal to 200 gal water. Apply (Prolate) 1-2 qts per animal. ------------------------------------------------------------------------------- \h 1 'House Fly Control in the Milk Room' HOUSE FLY CONTROL IN THE MILK ROOM 1. Space spray - pyrethrins plus a synergist 2. Surface spray - dichlorvos (DDVP, Vapona) 3. Bait - dichlorvos (DDVP, Vapona); naled (Dibrom); trichlorfon (Dipterex); ronnel (Korlan) 4. Resin strips - dichlorvos (DDVP, Vapona) Do not contaminate milk or milking equipment. Care should be taken in treating milk rooms or bulk storage rooms. Few materials are recommended for this use. Follow instructions and precautions on the label carefully.