EXPERIMENT STATION BULLETINS. 287 



CLOVER-HAY WORM. 



(Pijralis cos talis.) 



Considerable loss has been occasioned of late by an old offender, the 



clover-hay worm. This creature does not 

 attack the clover until it is put in the stack 

 or in the mow, when it commences to spin 

 its silken webs through the hay, binding 

 everything more-or-less loosely with a mass 

 of whitened webby waste. About the bor- 

 ders of the pile and in the crevices between 

 the boards are placed the small white co- 

 coons, which but add to the general injury. 

 The bottom of the stack usually suffers most 

 severely. Throughout this mass are to be 

 found the small, dirty-white caterpillars 

 Fig. 9.— Clover-hay moth, which wriggle about when disturbed, drop- 

 eniarged. Original. ^^^^ ^^ ^jj^^^ threads in attempts to get 



away. Stock refuses to eat h.ay when badly webbed, and the loss is 

 often very considerable. 



REMEDIES. 



All methods of control look to the destruction of the remains of old 

 infested clover hay before the new crop is harvested. Clean out the 

 mows and destroy the webbed hay, preferably by fire, in the spring, be- 

 fore putting in the new crop. Care in doing this will be well repaid 

 later. The adult moths appear in early June and infested hay should 

 be destroyed before this time. Where it is possible to avoid it, do not 

 place new stacks on top of the remains of old ones, or even on the same 

 ground. 



THE BEAN-MAGGOT. 



*■ 



(Pegomyia fitsciceps.) 



For many years Michigan has borne more-or-less complainingly the 

 ravages of the onion-maggot and of the cabbage-maggot, which latter 

 also attacks the radish. 



We have been on the outlook for the third member which is needed 

 to complete this trio of root maggots, viz., the beau-maggot. Last sum- 

 mer this expected pest made itself known in a field of beans at the 

 College. 



On July 5th, just as the beans were nicely up above tlie ground, a 

 large proportion of the young plants showed the effects of unusual at- 



