. Annual report. Entomological Society of Ontario; Insect pests; Insects. Much annoyance was caused by the presence of a very small black flea-beetle (Epitrix cucumeris) Fig. 21, on both the potato and the tomato plants. This beetle about 1-16 inch in length, is black with a whitish pubescence. This insect works upon the upper side of the leaf and makes perforations. It is easily overcome with Paris Green. The Cucumber Beetle (Diabrotica vittata) Fig. 22, was as usual a great nuisance on the cucumber, melon, squash, and pumpkin vines. Many inquiries were made as to the best mode of dealing wit
. Annual report. Entomological Society of Ontario; Insect pests; Insects. Much annoyance was caused by the presence of a very small black flea-beetle (Epitrix cucumeris) Fig. 21, on both the potato and the tomato plants. This beetle about 1-16 inch in length, is black with a whitish pubescence. This insect works upon the upper side of the leaf and makes perforations. It is easily overcome with Paris Green. The Cucumber Beetle (Diabrotica vittata) Fig. 22, was as usual a great nuisance on the cucumber, melon, squash, and pumpkin vines. Many inquiries were made as to the best mode of dealing with these beetles. The remedy we found to be most effective was Paris Green with considerable lime added, applied with a knap-sack pump. The rod had an elbow so that the under sides of the leaves were thoroughly sprayed. This year applica- lg' lg' #' tions of Paris Green were made whenever new leaves appeared. The Squash Bug (Anasa tristis) Fig. 23, seemed to thrive this year in spite of every precaution. Decoy crops are generally very valuable, but were quite ineffective in most cases this year. Hand-picking of the leaves containing the clusters of eggs or nymphs was found very effective. The Cabbage Worm (Pieris rapse) was very plentiful this season, and did much damage to cabbage, turnip, and rape plants. In the case of cabbages the worms can be very successfully treated either by Paris Green and lime spray, or by dusting the leaves with insect powder, mixed with flower or ashes. The Cabbage Aphis (Aphis brassicse) did^not appear in such numbers as they did last year, but the application of kerosene emulsion, diluted with 15 parts of water, to the under side of the leaves will practically exterminate them. The grape-vine had its usual enemies, but so far as my knowledge goes, the Flea- beetle (Haltica Chalybea) Fig. 24, was not so troublesome this year as usual, but it is still considered a bad pest. The best method of controlling it is, (1) to spray with Paris Green the buds
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
