154 MAINE AGRICULTURAL EXPERIMENT STATION. I915. 



The young hoppers are light green or yellowish and occur especially 

 upon the underside of the kaves and usually ranged alongside the mid- 

 rib or larger veins of the leaf. The development of the larvae is rather 

 rapid and for Maine it is probable that at least two generations may be 

 produced as both adults and nymphs were found in mid-siunmer. 



The distribution of this species covers all of the state and its range 

 of food plants is apparently about the same as for other sections as it 

 was noted upon a number of different host plants, although especially 

 upon apples, potatoes and beans. Upon the latter it was found fairly 

 common at Highmoor Farm and Houlton. At Highmoor Farm its 

 occurrence on beans was indicated by very distinct spots upon the leaves. 

 The attack clearly showing that a large abundance of the hoppers would 

 result in a very distinct withering of the plants. 



The treatment of this species depends upon the plants affected, the 

 use of two measures, the spraying and the so-called "shield" method. 

 The success of the spraying for the species has been somewhat varied, 

 the writer having found in treating an outbreak on potatoes that a 

 spray of kerosene emulsion seemed to be very effective, while some 

 observations have shown that the results were quite unsatisfactory, 

 especially as applied to the adults. Dr. Hasemann recommends for 

 apple a very heavy spray especially while the insects are in the nymphal 

 stage in the early part of the season so as to secure practically exter- 

 mination and prevention of the later broods. With potatoes a special 

 spray which was directed so that the adults in leaping from the plants 

 were certainly wet by the solution seemed however, very effective and 

 an adjustment of the spraying machinery so that a similar result could 

 be obtained on apple trees or nursery rows, ought, it seems to me, to 

 be equally effective. The shield method consists in the use of a sheet of 

 paper or canvas covered with tar or "tangle-foot" carrying it along 



Fig. 35. Eiupoasca mail njmiphal stages 

 ster, Iowa Exp. Sta. Bulletin.) 



I to 5. (After R. L. Web- 



