INSECTS INJURIOUS TO CLOVER AND ALFALFA 211 



The Green Clover-worm * is another caterpillar which is 

 frequently abundant in fields of clover, alfalfa, soy beans and 

 related crops. It is a green caterpillar with darker stripes, an 

 inch or more in length and the larva of one of the common dull- 

 colored moths of the cutworm type. It is best controlled by 

 harvesting the crop when the worms are present in the greatest 

 abundance but are not quite grown, whether the crop is quite 

 ready to cut or not. In this way many are starved and others 

 perish from exposure to the sun after the crop has been removed. 

 Supplement this with the brush drag if the worms are especially 

 numerous. 



The Alfalfa Looper f is one of the serious occasional pests 

 of alfalfa in the Northwest. 

 It is abundant mainly in 

 irrigated regions. Control 

 measures recommended 

 are similar to those for the 

 green clover-worm and al- 

 falfa caterpillar and are at 

 times supplemented by the 

 use of poisons. FIG. 177. The green clover worm; adult or 



The Garden Webworm moth ' Much enlar s ed ' < After Hill) ' 

 (See Chapter XIX) sometimes defoliates alfalfa and related 

 plants and leaves over the injured stalks the webs which serve 

 to identify it. Control measures applicable to it are almost 

 exactly similar to those for the other caterpillars listed. 



"~ *~Plathypena scabra Fabr. Family Noctuidae. See Farmers' Bulletin 

 No. 982, U. S. Dept. Agr. 



f Autographa californica Speyer. Family Noctuidae. See J. R. .Parker 

 Jour. Econ. Ent., Vol. 8, No. 2, 1915. 



