70 



be very abunduiit upon crim.son clover throuu-hout the State. In 

 several instances they were observed spreading to the peas. With 

 rare exceptions, however, they spread only to the late peas, and almost 

 all our growers had first-class crops of early peas. One or two fields 

 of crimson clover innnediately next to pea fields were fairly alive with 

 lice, and though none could be found on the early peas they were 

 spreading on to the late varieties. At this time but few lice could be 

 found on red clover. By May 22 the lice had become quite thick on 

 the late peas. Fields sowed in 8-inch drills were found to be much 

 worse infested than those in 30-inch rows, and subsequently were much 

 worse injured. In fact, both early and late peas sown in drills or 

 broadcast were a practical failure. One- acre of market garden I saw 

 had hardly a pod formed; on another field of 20 acres of Alaska and 

 Admiral about 1,(>0(I pounds of peas were secured and the rest was cut 

 for fodder or turned under. By this time (May 22) most of the clover 

 had been turned under, and the lice had left that which remained 

 standing. They now became more common on red clover throughout 

 the State, but never very numerous. In fact, pea lice could now be 

 found everywhere and on everything. On squash vines, apple trees, 

 in every fence-corner cobweb, could be found the ever-present, stray 

 pea louse. 



Not luitil the first week in Jvuie did the enemies of the lice commence 

 to check their increase, and though they soon multiplied so rapidly, 

 and did such efficient service, that Init few lice were to be found when 

 the late crop was being cut on Jiuie IS, still they were too late to 

 benefit the pea crop, as the injury had already been done. As a result 

 the late varieties have probably yielded about one-fourth of a crop on 

 the average, the yield varving from a))solutel3^ nothing to a full crop. 

 The lice have been fewer in numbers and have done less injviry than 

 last year, as last year considerable injury was done the earl}^ crop. 

 Had it not been for the cool, wet weather of the latter part of May, 

 the injury Avould have been much more severe, l)ut this doubtless 

 prevented a more rapid reproduction of the aphides. 



Possibly the most important enemy of the lice was the fungus 

 Empusa ajj/tidls. Individuals killed by this were found commonly on 

 clover early in the season, but not in any number. Not until June 11 

 were diseased lice found in quantity, but on that date it was apparent 

 that the fungus would soon kill the larger part of them, as man}' were 

 dead and the majority were affected. A week later but very few lice 

 were found, and almost all were diseased. 



Parasitized aphides were fairly conuiion on the crimson clover, but 

 none were seen on peas until June 11. At least 5 per cent were killed 

 by parasites whose identity has not yet been determined. Last fall 

 several Ap/iidms washmgtonensh Ashm. were bred. 



