INJURIOUS INSECTS. 341 



Cahhige Worm. — The cabbage worm, the larva of the 

 common white butterfly, may be easily destroyed in several 

 ways. That of hand-picking, if begun before the first brood 

 has passed into its perfect state, is efTectual. We have also 

 found that pyrethrura powder mixed with five times its bulk 

 of plaster, and dusted into the centre of the leaves with sul- 

 phur bellows, is certain destruction to every one of them. 

 The ajiplication of insecticides in liquids to the cabl)age has 

 not been satisfactory, on account of the peculiar structure of 

 the leaf surface, which allows the water to roll off in drops, 

 and not adhere to any part of it. Paris green is unsafe to use 

 after the leaves have become over four inches in diameter. 



Currant Worin — The currant worm should be destroyed 

 while small, with the dust of hellebore or pyrethrum. The 

 latter being perfectly harmless is to be more highly recom- 

 mended. 



Plum Weevil. — There are two certain methods of captur- 

 ing the plum weevil ; the first by jarring the tree early in 

 the morning and catching them upon sheets stretched below 

 upon a frame or upon the ground, and the second by placing 

 chicken coops under the trees. The former method must be 

 attended to regularly every morning for three weeks after 

 the plums have set; and in the latter case, if the number of 

 ti'ees is large, a large flock of chickens will be required to 

 make that remedy effectual. 



Codling Moth. — No positive remedy against the ravages 

 of this insect has as yet been found. It is claimed that paris 

 green sprayed over the tree in water is efi'ectual ; but should 

 it prove so, it is far too dangerous a remedy to apply where 

 grass or other crops are growing under them. 



Apple and Peach Dover. — For the destruction of these 

 two insects no sure remedy has been found, except the knife. 

 It is probable that covering the trunk of the tree near the 

 ground with the ink or tar used to catch the moths of the 

 canker worm, or wrapping around the trunk bands of tarred 

 paper, would assist in keeping them away. 



The Rose Bug. — The rose bug has thus far been the most 

 difficult to overcome of the whole tribe of injurious insects, 

 and we can recommend no remedy with a great degree of 

 confidence, but would advise the trial of the fumes of gas tar 



