REPORT OF STATE ENTOMOLOGIST. 303 



If the leaves were raked up and burned many of them would 

 be destroyed. 



The green apple louse, Aphis ponii. This insect does con- 

 siderable damage to the tender growth of young trees, especially 

 in the nursery. These should be sprayed as soon as their pres- 

 ence is noticed, with kerosene emulsion. It would be better to 

 examine the young shoots before they leave out in the spring. 

 If small shiny black specks are found this would indicate the 

 presence of the lice, as these are the eggs. Spray as soon as 

 these hatch out and they are easily destroyed, but if the spraying 

 is neglected until the leaves are all curled up it is almost impos- 

 sible to destroy them, as they are all inside the curled up portion. 



OTHER EEAE INSECTS. 



Among the other leaf insects are the following: 



Forest tent-caterpillar, apple tent-caterpillar, brown-tail moth, 

 gipsy moth, red-humped caterpillar, old and white-marked tus- 

 socks, yellow-neck caterpillar, canker worms, fall web-worm 

 and many others too numerous to mention. The most destruc- 

 tive of the above named insects at the present time is the red- 

 humped caterpillar. Especially is this true in the nursery and 

 young orchard. 



The caterpillars hatch from the eggs and remain congregated 

 together as they feed, at first merely skeletonizing the leaves. 

 They develop very rapidly, eating the leaves as they grow so 

 that in a short time a small tree would be entirely stripped. 

 This is generally done while the orchardist is busy haying and 

 the injury is not apparent until the tree is destroyed. A care- 

 ful watch should be kept on the orchard and as soon as the 

 young are detected the leaves should be removed and the cater- 

 pillars destroyed. 



For tent-caterpillar collect egg-clusters during winter or 

 spring. Destroy nests by burning. 



It would be well to burlap trees through the season, as many 

 of the above named caterpillars would be captured, including 

 the codling moth larvae. Take old short sacks and cut up into 

 strips eight inches wide; put a strip around the trunk of the 

 tree and fasten with a string around the center of the burlap, 

 then fold down the upper half. This will serve as a hiding 



