72 ASSOCIATION OF ECONOMIC ENTOMOLOGISTS. 



ORCHARD INSECTS. 



The San Jose scale (Aspidiotus perniciosus Comst.) has not caused 

 so much damage to orchards as usual, owing to the amount of spray- 

 ing that has been applied. Many gratifying results have been ob- 

 tained with the lime and sulphur wash and its use has increased 

 during the past year. Owing to the poor prospects for an apple 

 crop, many orchardists believed it would not pay to spray in order 

 to control the codling moth {Carpocapsa pomonella L.). The expe- 

 rience of the past three years indicates that, in spite of the many 

 assertions concerning the ease with which this insect can be con- 

 trolled, that frequent and careful spraying must be applied, and that 

 orchards in unsprayed localities must receive special attention, par- 

 ticularly if the crop is light. 



The plum curculio ( C onotrachelus nenuphar Hbst.) caused consid- 

 erable injury to apple orchards in the eastern part of the State ac- 

 cording to observations made by Mr. Runner, one of the assistant 

 inspectors. In cases where the greatest damage was done, the trees 

 had not been systematically sprayed during the past few years. 

 Eighty-five per cent of the fruit on one tree showed curculio marks 

 and many of the apples had been punctured so many times as to be 

 practically worthless. One spraying with Paris green during May 

 gave little evidence of value for controlling the insect. Other or- 

 chards in the same section of the State that had been systematically 

 sprayed for several years with arsenate of lead showed very slight 

 injury. 



During the past year the injury caused by the grape root- worm 

 (Fidia viticida Walsh) has been slight and vineyardists have paid 

 little attention to it. In several sections of the grape-growing area 

 of the State serious losses resulted from the attacks of the grape 

 berry moth {Polychrosis hotrana Schiff.). In some vineyards exam- 

 ined the Concord, Niagara, and Catawba varieties were almost com- 

 pletely ruined and the actual loss was greater than last year. 



FOREST A NO SHADE TREE INSECTS. 



The leaf -mining locust beetle (Odontota dorsalis Thunb.) has been 

 notably abundant in the Ohio River counties during the sum- 

 mer. Hundreds of locust groves were practically defoliated, and the 

 infested area was much larger than during the preceding year. 

 The recent interest which is being taken in planting locust groves 

 as a means of supplying posts, poles, and small timber is increasing, 

 and this insect, unless checked in the future by some natural enemies 

 may be the means of causing great injury to young plantations of 

 these trees. 



