. Annual report of the Fruit Growers' Association of Ontario, 1902 . the past season, when a few specimens were taken. Dr. Fletcher re- y oH I commends : \ ^ V (1.) Hand-picking, early in the season, of the old bugs when they Fig. 20. Squash-bug. first resort to the plants, and also of the easily seen egg clusters. Thisrequires an inspection of the vines every day or two. The young bugs may be easily destroyedwith a spray of kerosene emulsion, or of whale-oil soap. (2.) Trapping,—This consists of placingat intervals through the plantation, shinglesor pieces of board, beneath which the bugsgath
. Annual report of the Fruit Growers' Association of Ontario, 1902 . the past season, when a few specimens were taken. Dr. Fletcher re- y oH I commends : \ ^ V (1.) Hand-picking, early in the season, of the old bugs when they Fig. 20. Squash-bug. first resort to the plants, and also of the easily seen egg clusters. Thisrequires an inspection of the vines every day or two. The young bugs may be easily destroyedwith a spray of kerosene emulsion, or of whale-oil soap. (2.) Trapping,—This consists of placingat intervals through the plantation, shinglesor pieces of board, beneath which the bugsgather for shelter. By examining theseevery morning, many may be captured. Ina season when the bugs have been abundant,all vines should be burnt as soon as the crophas been gathered. In this way, many ofthe insects in all stages of development willbe destroyed. The Caterpillars of the White Cabbagebutterfly were not so numerous as last yearbut caused, however, some harm in turnipand rape fields, as did also the Zebra cater-pillar {Mamestra picta) Fig. 21, which was. Fig-. •21. Mftinestra picta : a, Zebra caterpillar ; b, Moth. 38 THE REPORT OF THE No. 19 fairly abundant. Edrly in the year hundreds of cut-worms of Noctua ff/nnica were presentin clover fields but I have not heard of their having done serious damage. During the season considerable attention has been given to studying life histories, par-ticularly of lepidoptera. Many specimens have been reared and some additions made to ourknowledge of common species.—Some of the results of this work are submitted herewith show-ing the larvae, pupae, and perfect insects and in some cases parasites also of :— HydroRcia cdtaphracta In burdock. (Lappa inajor.) Gluphisia trilineata On Aspen. {Populus tremuloides.) Edema albifrons On Oak. Ly::omorpha pholus On lichen on rocks. Eudryas grata ...... On grape vines. Metzeria lappella Seeds of Burdock. Euplexia lucipara Ferns of all kinds. Peridroma occulta .... Injuring asparagus. Mam
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