June, '15] LEONARD: CONTROL OF TARNISHED PLANT-BUG 



365 



Although the tanglefoot band soon became filled with insects of 

 many kinds — flies, beetles and bugs, it was noticed that practically no 

 tarnished plant-bugs had been captured. Time and again these insects 

 were seen to either crawl or fly onto the tanglefoot, walk about upon 

 it, and then either crawl back onto the wire cloth or proceed to the top 

 of the band and fly into the enclosure. This was not due to the fact 

 that the tanglefoot did not remain sticky for it caught other insects con- 

 stantly. But one tarnished plant-bug was observed to crawl through 

 the meshes of the wire cloth and this one only when a cyanide bottle 

 had been placed over it. 



On November 8 the peaches were examined and when the enclosed 

 block and the check block were compared as a whole no difference 

 could be seen in the growth of the trees as affected by the tarnished 

 plant-bug. 



Bagging 



When the tip of the leader on a peach nursery tree is stung" by 

 the tarnished plant-bug the upward growth of the tree is checked, the 

 nourishment is thrown into the laterals, and a short bushy tree which 

 has lost much or all of its market value is the result. 



In July and August, 1913, preliminary experiments were performed 

 in protecting the terminals of the peach trees from tarnished plant-bug 

 injury by placing paper, mosquito netting and cheese-cloth bags 

 over them. From the results obtained it seemed that it might be 

 feasible to protect the tips by means of five-pound unglazed paper bags 

 without injury to the foliage. Accordingly on June 18, 1914, before 

 any of the tips had been stung, row 15 south and west of the fenced 

 enclosure consisting of about 450 trees, was bagged with five-pound 

 unglazed paper bags. These were placed over the tips so as to leave 

 about three inches between the tip of the leader and the bottom of 

 the bag in order to allow for some growth. The bags were folded once 

 at the bottom so as to close the opening as completely as possible and 

 fastened together with two pins. It was found that one man could 

 put on 100 bags in slightly less than an hour. 



On June 26 these bags were examined and it was seen that as the 

 tips of the young trees were still tender they were being bent far over 

 to the east, due to the weight of the bags and the constant west winds 

 which continually blow over the nursery blocks. On this date 300 bags 

 were placed on trees in th^ first row west of the enclosure. 



On June 30 all the bags were removed as it was found that they 

 were impeding the growth and destroying the shape of the trees. On 

 row No. 1 the foliage under the bags was somewhat cramped, though 

 not greatly so as they had been on only four days. The tips, however, 



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