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Show County Agent's Column PHENOTHIAZINE AIDS IN NATIONAL FIGHT AGAINST PARASITES "Sharing the meat" is a neighborly neigh-borly wartime policy, but it doesn't go so far as to include sheep worms and parasites, says County Agent Whornham. Sheep and lambs, besides providing badly needed 'meat and wool, are the sources of such war necessities as pelts for special uniforms and surgical sur-gical catgut. Parasites are the greatest obstacles obsta-cles to sheep raising in the United States, but scientific findings are helping us to cope with them effectively. ef-fectively. Until a few years ago nodular worms alone caused the loss of about 100 million pounds of lamb annually, and the loss from discarding dis-carding intestines damaged by parasites pa-rasites amounted to 6 million dollars. dol-lars. Stomach worms also have caused losses of several milliqn dollars a year more. In the fight against these parasites, para-sites, flock owners now have a valuable va-luable drug remedy in phenothia-zine, phenothia-zine, which was developed for use in animals by research workers of the Department of Agriculture. This drug destroys parasites in infested in-fested livestock and likewise helps prevent disease by removing the source, the County Agent explains. Flock owners have a choice of several se-veral ways in which to adminster phenothiazine in feed, in salt, in capsules, or as a drench. Research has shown also how to make pastures safer for sheep and other animals, by resting pastures, by systems of rotations, by changing chang-ing the species of animal on a pasture, pas-ture, or sometimes by growing a crop there in order to let animal parasites die out. Knowledge of the life cycles of the different parasites, pa-rasites, as worked out by painstaking pain-staking research, is the basis for the best strategy to use in each cause. PRINCIPLES OF PEST CONTROL It is important to know the feeding feed-ing habits of the insects you intend in-tend to control. Stomach poisons are used to poison poi-son those types of insects that (a) bite off, chew, and swallow, portions por-tions of the food plants, (b) rasp the surface of the food plant and suck up the resulting pulp, (c) lap up food or moisture from surfaces that can be poisoned, id) can be induced to feed upon artificial foods such as poisoned baits or (e) possess the habit of using the mouth parts to clean the body appendages, ap-pendages, and so may swallow poisons placed where the insects must encounter them. In all such cases, the poison is taken into the alimentary tract. The stomach poi- |