1915 



ENTOMOLOGICAL SOCIETY. 



47 



Prof. Crosby : In regard to the Tarnished Plant Bug, in Rochester where 

 it is a great pest in nursery stock. I think that in that region at least, the injury 

 to peach buds is caused almost entirely by this insect, though in other portions 

 of the country it may be caused by something else. I have never been able to 

 find there a mite doing any perceptible injury. We worked on this question last 

 year, and the results were published in the winter. This summer we continued 

 Dur work with the same results as before. We did not succeed in doing anything 

 to prevent their injury or destroy the bug. This summer we surrounded a 

 portion of the peach block with a six foot wire screen fence of the ordinary mesh 



Fig. 8. — European Fruit Lecanium Scale (Lecanium corni). 

 On the left are the full-sized scales, some of them with holes from 

 which parasites have emerged. On the right is the winter stage 

 of the scale. The tiny scales or specks in the centre are also 

 winter stage that were removed from the twig. Note the small 

 size of this stage compared with the adult scale. 



wo have on windows. A few observations we made last year led us to believe 

 that they would not iiy over such a fence to any extent. We also put a band of 

 tanglefoot round the top. We found that a "great many would walk over the 

 tanglefoot quite easily while other insects got caught. Some flew over. There 

 are many high winds there, and by tlie end of the season of injury, which was 

 about the middle of July, there were as maily stung nursery trees inside the fence 

 as outside. We also had the idea of putting paper bags on the top of the trees 

 to prevent injuries. We had to put the bags on so early in the season that 

 the trees were too tender and would bend over with the weight of the bags. 

 That had to be abandoned. Finally we thought we might be able to help the 

 trees overcome the injury by a system of summer pruning. The results of this 



