EC1548 Revised 1947 Controlling Hog Mange and Lice with Benzene Hexachloride

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University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Historical Materials from University of Nebraska- Lincoln Extension Extension 10-1947 EC1548 Revised 1947 Controlling Hog Mange and Lice with Benzene Hexachloride Martin H. Muma Follow this and additional works at: http://digitalcommons.unl.edu/extensionhist Muma, Martin H., "EC1548 Revised 1947 Controlling Hog Mange and Lice with Benzene Hexachloride" (1947). Historical Materials from University of Nebraska-Lincoln Extension. 2671. http://digitalcommons.unl.edu/extensionhist/2671 This Article is brought to you for free and open access by the Extension at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Historical Materials from University of Nebraska-Lincoln Extension by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln.

E.C. 1548-<-17 Revised Controlling Hog Mange and Lice with Benzene Hexachloride Cooperative Extension Work in Agriculturet and Home Economics University of Nebraska College of Agriculture, and the United Shttes Department. ~f Agriculture cooperating,,

CONTROLLING HOG MANGE AND LICE Martin H. Muma, Exten!=Jion Entomologist The two most comnon and important insect parasites of hogs in Nebraska are mange mites and hog lice. Although all classes and ages are attacked, injury is greatest :to pigs. Both of thes~ parasites develop large populations on po8rly fed anima1s that are kept in insanitary pens and houses. Hogs -infested with either or both of these insects are restless, rub frequently, have reduced vitality, gr.ow slowly,. eat more feed, and produce a poor quality of pork In cases of extreme infestations little pigs may be killed. Two kinds of mange fiftiet h scrapings tunnels, burrows or galleries beneath the surface of the skin. Adult females and newly hatched young occasionally leave the burrows to move over the body. Eggs that hatch in 3 to 10 days are l aid in these tunnels, and the mites mature in 10 to 12 days to complete the cycle. Early stages of sarcoptic mange may be determined by the presence of tiny, pimply, granules or lesions around the eyes, ears, nose, and on the under parts of the body. In old or advanced cases the granular areas grow together and typical dry, scurfy, scabby areas are formed all over the body. Scraping and rubbing by the animals cause much hair to be lost, EJ,nd tl;j.e.infested _a:r~as may be ent1r.~~y bar,e ~.: - :r ; "'"'

BENZENE HEXACHLORIDE DILUTION TABlE FOR 25% OF THE GAMMA ISOMER For 5 gallons of water -.84 pound of 12% gamma wettable powder 1 pound of 10% gamma wettable powder 1.65 pounds of 6% gamma wettable powder 2 pounds of 5% gamma wettable powder F?r 50 gallons of water - 8.4 pounds of 12% gamma wettable powder 10 pounds of 10% gamma wettable powder 16.5 pounds of 6% gamma wettable powder 20 pounds of 5% gamma wettable powder For 100 gallons of wat~r - 16.8 pounds of 12% gamma wettable powder 20 pounds of loojo gamma wettable powder 33 pounds of 6% gamma wettable powder 40 pounds of 5~ gamma wettable powder Nebraska COOPERATIVE EXTENSION WORK IN AGRICULTUBE AND. HOME ECONOMICS U. of N. Agr. College & U. S. Dept. of Agr. Cooperating W. V. Lambert, Director,. Lincoln

Control of sarcoptic mange has, until recently, consisted of a series of three to five treatments at ten-day to two-week intervals, combined with strict sanitary m.~. W.e!? :Ln the hog house and lot. The control recomrnen- dations included dipping hogs in a vat in which tw.o or three inches of crude petroleum oil were floated on water, spraying with crude oil thinned with kerosene, and spraying or dipping with a mixture of one gallon of commercial liquid lime-sulfur in 25 gallons of water at a temperature of 95 to 105 F. Recent test work at the University of Nebraska has developed a new, simple, single treatment control method : Hogs sprayed with.25% of the gamma isomer of benzene hexa chlcride may be completely freed of sarcoptic mange. Complete coverage of the animals ' is necessary. Hogs sprayed in a small pen or house climb over each other, thus wetting themselves completely. Care should be taken to spray the inside of the ears. Hog mapge treatments should be applied to the breeding stock in the early fall to prevent infestation of the fall and spring pig crap. Wettahl,e powders of benzene hexachloride contain varying amoimts of the gamma isomer. The exact percentage of the isomer must be known before the spray is mixed. To mix a spray containing.25% of the ganmia isomer, use 8 pounds of.'a 25% garrrrna powder, 20 pounds of a lo% garrrrna dust, 33.'p-ounds of a 6% gamma dust. or. 40 pounds of a 5% gamma dust!> j,p 1'00 gallons _of water. Several tests _whh a. spray contil:ining.125% qf ' the : gamma. isomer ': mve be~n carried out with :promising ree)ults.. :r'h~s spray str~ngth is S1.).ggested fo:r, trial, only _. ~ ~ :.9!}J.;7. ~ lf. Of tpe ; ~o~ tf:j ' ~f the dusts listed above is neede~ when.mixing a spray conta ini~g.125%. o:f :th~ @.:~ f.somer. _As _ lit;t 'r~. is },m_ow conee:rning the toxicity.,ar ab,s0rption. of. :penze:g.~. he~.:. cl).lpr:i,de by ~ni~ls~.e,jpray.. _ qont~ i:n'~pg - ~- more, thw ; ~ -25%. _6f. the BaiJ:IIM : isomer. should: not.:-b~ - u s -~d., ' -..,,-. _.,~ : :;,.pempdectic mange. i.s. c_aused by. slllfl,il, ': nqcr?e;j - ~opi'~ _; whitish, Wt:Jrm;;-.like mites,t1jtt~.:: ~nfe~:t ~ t,:pf;:l ~1~ _ fo~~~~~:~ -~ and oil gland~ of the skin. Li,ght infe~ta t~ _on s _ of de:ip.b-: dectic mange seem to cause no s'erious dis-comfort; to tire animals, _ but heavy ini'es.tations ' caus~ deep, wejcl-marked lesions or sores.

Although there is no known treatment that will completely cl ean up demodectic mange, regular dippings with crude petroleum oil will hold the infestation down. Herds infested with demodectic mange should be dipped, fattened for market, and sold. The houses and l ots should be disinfected before they are restocked with hogs. Nothing is known about the effect of benzene hexachloride on demodectic mange. Lice The hog l ouse, (Haematopinus adventicius Neum.) is the l argest blood-sucking l ouse t hat attacks livestock. It is bluish gray in color, has a broadl y flattened body about one- quarter of an inch l ong, and i s provided with a strong piercing beak. Hog lice are found only on hogs except i n a ccidental cases, and pa s s their entire lives on the animals. They live only 2 t o 3 days when separ ated from the hogs. The eggs or "nits" t hat are glued t o the hairs hatch in 12 to 20 days, and the young lice mature and begin l aying eggs in 10 to 12 days. The average life cycle is about 35 days. Young lice, especiall y during very hot or cold weather, are frequently f ound inside t he ears. Older l ice wander over the body feeding from time to time. The control of hog lice, in the past, included crude petroleum oil dips a s for sarcoptic mange. Today, dipping or spraying in the f all with rotenone or DDT is the recommended treatment. The rotenone mixture consists of 5 pounds of a 5% rotenone powder in 100 gallons of water; the DDT mixture is 4 pounds of a 5o% wettable DDT in 100 gallons of water. Two treatments spaced at 14-day intervals seem to be necessary for a complete clean up. Sows should be treated before farrowing, and boars before breeding to prevent infestation of pigs and sows respectively. Housing and bedding should also be treated a s a sanitary measure at the time of the first application on the animals. Early tests with benzene hexa chloride show it to be highly effective in killing both the eggs and live lice. The treatment for sarcoptic mange with this material should a lso control lice