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AGRICULTURAL EXPERIMENT STATION. 237 



Entomologists that their writings bo as free as possible from errors 

 and that great care should be taken, especially in quotations, to 

 keep theories and surmises distinct from facts obtained by 

 careful research. 



Notes on Other Insects. 

 While studying Trypeta, observations were incidentally made 

 upon other insects. The late appearance of Codling moth larvae 

 in apples, examined in 1888, would suggest that the eggs of the 

 spring brood may be deposited on apples after they are consider- 

 able size. This would have an important bearing upon the proper 

 time to spray with arsenic solutions. It might be better to wait 

 until apples are as large as marbles than to spray when they are 

 only the size of peas as is done in Maine. Codling moth larvae, 

 one-half grown, were found in apples in November, 1888. In 

 1889 we noticed much insect work in stored late apples, which 

 appeared to be that of half grown codling moth larvae. It would 

 seem that there is a second brood of this insect in Maine, but that 

 the larvae are only half grown when frost appears and they probably 

 perish. The second brood cannot be reached by spraying and con- 

 siderable damage is done by it. The fact that but few apples 

 affected by the Plum Curculio were noticed after August, would 

 indicate that this insect works early in the season and that the 

 apples affected drop early. The cuts were quite abundant early 

 in Jul}', showing this insect does considerable damage to the 

 apple. A large number of the punctures were abortive, no larvae 

 being found in them, while frequently dead larvae were noticed in 

 the channels made by them. Only a small per cent, matured and 

 transformed. This would seem to show that this insect does not 

 find in the apple the most favorable condition for its development. 

 Its injuries are not confined to the apples in which the larvfe 

 mature but all apples stung either drop or are poisoned. Those 

 that do not drop are dwarfed and growth in the vicinity of the 

 punctures arrested. This insect was considered in Report for 

 1888. Considerable work, supposed to be that of the Ash-gray 

 Pinion was observed the past season. The larvae of this moth 

 eats holes intK^ the sides of apples. 



