. Annual report of the Fruit Growers' Association of Ontario, 1902 . in someinstances were positively harmful. In the first place, they are difficult to fit to the trunk ofthe tree ; secondly, the sticky substance did not hold the caterpillars, and other forms ofinsect-life, or prevent them from crawling over it; thirdly, the poisonous band did not killthe insects which crawled beneath the collar ; and fourthly, the bark of the tree immediatelybeneath the band was frequently seriously injured. In my humble opinion, decided improvements in the construction of this device must bemade before it b
. Annual report of the Fruit Growers' Association of Ontario, 1902 . in someinstances were positively harmful. In the first place, they are difficult to fit to the trunk ofthe tree ; secondly, the sticky substance did not hold the caterpillars, and other forms ofinsect-life, or prevent them from crawling over it; thirdly, the poisonous band did not killthe insects which crawled beneath the collar ; and fourthly, the bark of the tree immediatelybeneath the band was frequently seriously injured. In my humble opinion, decided improvements in the construction of this device must bemade before it becomes effective. In Prince Edward County the Apple Maggot {Tri/peto pomovieila) was abundant. In someorchards more than half the fruit was injured by this maggot. The work of this insect differs from that of the Codling-worm in that channels are eaten through the fruit in every direction. Spraying is of no value in combating this pest, and the V y remedy is one of prevention. The infested fallen >/v/^ \, ^/* fruit should be destroyed at once, so as to prevent. ^^- 71
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