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 Grenf el ; 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 

 effective. 



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, U.S. 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 water with half a pint of crude car- 

 bolic acid; this mixture should be boiled for a few minutes and when re- 

 quired for use, diluted with fifty parts of water to each one of the mixture. 

 The application should be made once a week to the growing plants until 

 the danger of attack is over. 



Ctit-worms and Wire-worms have given trojible in many places : at 

 Mount Charles tne Colorado Potato-bo?tlo a(taclcod and did considr^r-.bl'^ 



4 EN. 



