168 EXPERIMENT STATION RECORD. 



the fields to a distance of 20 or 30 ft., it was found that the attack of the locusts 

 was very materially checked. The use of horse dun;tr for this purpose in the place 

 of bran lias the advantage of cheapness. 



Notes are given on a number of insects which were injurious to some extent upon 

 root crops and garden vegetables. The species of insects chiefly coDcerned in these 

 attacks were cabbage aphis, cabbage worm, variegated cutworm, and other species of 

 cutworm, cabbage-root maggot, asparagus beetle, zebra caterpillar, squash bug, and 

 striped cucumber beetle. Brief notes are given on the habits and life history of the 

 species and the usual remedies are recommended for combating them. 



The insects which were most injurious to potatoes were striped blister beetle, 

 cucumber flea-beetle, tomato worm, potato-stalk weevil, and variable cutworm 

 {Mameatra atlantica). The striped blister beetle was injurious to potatoes, tomatoes, 

 mangel-wurzels, beets, and other garden crops. It is suggested that it may be easily 

 destroyed by spraying with Paris green, but that this measure should not be adopted 

 except where it is necessary, since the larvsR of the beetle are beneficial in destroy- 

 ing the eggs of grasshoppers. The potato-stalk weevil has not previously occurred in 

 Canada in sufficient numbers to cause any serious damage to potatoes. It is recom- 

 mended that all infested vines should be destroyed as soon as the potato crop is 

 harvested. Observations on the variable cutworm indicate that this species may 

 possibly be double brooded at Ottawa, since moths were captured as early as May 22 

 and as late as August 25. 



A number of fruit insects are dissussed in this report, including codling moth, 

 oyster-shell bark-louse, cankerworm, tent caterpillar, apple-tree borer, rose chafer, 

 wireworm, San Jose scale, Colaspls hrunnea, Lecaidum fdclui, Cecidoptes jjnmi, and 

 PJdceotribus liminaris. L. fitchii caused a great amount of damage to blackberries 

 near Trenton, Ontario, where about 8 acres of this fruit were found covered with 

 scales from about a foot above ground to the top of the canes. The injury was 

 chiefly done to the old plantations. C. primi is reported as causing galls of small 

 size on the young twigs, usually on old trees, They were found very abundantly 

 during the year at one orchard in Queenstown. The San Jose scale is still a very 

 important fruit tree pest ; it occurs in no other province of Canada excei^t Ontario. 

 Notes are given on the rajjidity (jf increase and the nature of damage done by this 

 species. It is stated that the Federal San Jose Scale Act has been rigidly enforced, 

 with good results. The three remedies which are recommended for the San Jose 

 scale as especially effective in Canada are whale-oil soap, crude petroleum, and 

 hydrocyanic-acid gas. Crude petroleum proved very effective on peach trees, in a 

 15 per cent mechanical mixture with water, and no injury was done to the trees. 

 G. E. Fisher carried out some successful exi)erinients in fumigating small fruits and 

 young trees in an inverted barrel. Brief notes are given on two species of insects 

 injurious to forest trees, viz, birch skeletonizer [Bucculatrix canadenskella) and 

 Semiophora youngit. The latter species was observed attacking American larch and 

 black spruce, and was described by J. B. Snuth as a new species. The moths appear 

 at the end of August and the early part of September. 



Entomological notes, J. A. Ortiz {Bol. Ofic. Agr. Ganadera, 2 {1902), Jan., pp. 

 408-415, figs. 6). — Brief notes on pea weevil, Eumolpus vitis, fruit-tree bark beetle, 

 Colorado j)otato beetle, and Lytta otomaria. 



Injurious insects, J. C. Chapais {Nat. Canad., 29 {1902), No. 5, pp. 65-70).— 

 Brief notes are given on the habits and life history of the grain weevil, rice weevil, 

 and raspberry sawfly. The usual remedies are recommended for combating these 

 insects. 



Some insects which, are injurious in springtime, H. Faes {Cliron. Agr. Canton 

 Vaud, 15 {1902), No. ^7, pp. 189-195, figs. 2). — Brief notes are given on the habits 

 and lite liistory of Anthonomus pomorum, Hyponomeuta malinella, and other injurious 

 fruit insects of less importance. 



