. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 1906 ENTOMOLOGICAL SOCIETY. 49 Tlie root and stalk borers (Gortyna nitela—fig. 11—and cataphracta) were much complained of this year. The former was found in potato stems, and the latter was reported by Mr. C. W, Nash, of Toronto, as attacking all kinds of perennial plants in gardens, and also corn and tomatoes. It is difl&cult to prescribe any remedy for these insects, as they work out of sight and their presence is not suspected till they have seriously injured the plant. Attacks by various s
. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 1906 ENTOMOLOGICAL SOCIETY. 49 Tlie root and stalk borers (Gortyna nitela—fig. 11—and cataphracta) were much complained of this year. The former was found in potato stems, and the latter was reported by Mr. C. W, Nash, of Toronto, as attacking all kinds of perennial plants in gardens, and also corn and tomatoes. It is difl&cult to prescribe any remedy for these insects, as they work out of sight and their presence is not suspected till they have seriously injured the plant. Attacks by various species of Plant-lice (Aphis) were complained of in different parts of the Province; on Brussells-sprouts, for instance, at Strat- ford ; on turnips at Grenfel; on hops at >Shelburne; on sweet-peas at Pene- tanguishene; on honeysuckle at Toronto, etc. The ordinary remedies of spraying with kerosene emulsion or whale-oil soap wash have usually proved Fig. 11.—The Root and Stalk Borer (Gortyna nitela). a, female moth ; b, half-PTOwn larva ; c, mature larva in injured stalk ; d, lateral view of abdominal segment of same ; e, pupa—all somewhat enlarged. (After Chittenden, Dept. Agriculture). The Turnir* Magg'ot (Phorhif hrassirrr) was serioiislv injurious at Mark- dale, and the Onion Maggot (Phorhia ceparum) at Woodstock. For these underground insects there has not yet been found any perfectly effective remedy. In the case of the species attacking onions, it is recommended to dust the rows of plants with white hellebore once a week from the time that the young plants appear above ground; later on, when the bulbs are form- ing, the earth may be removed down to the roots and the exposed part dusted with white hellebore. The attack on turnips is not usually very severe, but the same species is liable to injure cabbages and radishes. It may be dealt with by spraying with a carbolic wash made of one quart of soft soap (or one pound of hard soap) in a gallon of
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