558 



for the preparation of the most commonly used insecticides and spray 

 mixtures, and dips for disinfecting seeds ; methods of fumigating 

 infested cereals, etc., are discussed in connection with the various 

 groups of insects to which they apply. 



Problems of Wheat Storage. — Commonwealth Australia Advisory 

 Council Sci. Indust., Melbourne, Bull. no. 5, 1917, pp. 19-23. 

 [Received 22nd October 1918.] 



A preliminary notice of this report has already appeared [see this 

 Revieiv, Ser. A, vi, p. 269]. The Progress Report of the Special 

 Committee that has been considering the damage done to stored 

 grain by insects discusses the development of weevils in wheat and 

 the increase in the number of weevils ; the destruction of weevils 

 by means of poisonous gases and by drying ; and favourable and 

 unfavourable conditions for the multiplication of grain weevils. 

 Points that still require elucidation are. the percentage of moisture 

 in samples of harvested grain from all the chief grain-producing 

 districts of the Commonwealth, and the degree and rate of absorption 

 of moisture from the air of moist climates by dry grain completely 

 protected from rain, but freely exposed to air. It is suggested that 

 the experiments made by F. J. C'ole on the effects of moisture and 

 carbon dioxide on the rate of multiplication of grain weevils should 

 be repeated and amplified under Australian conditions. 



Brittain (W. H.). Sucking Insects of the Apple. — Fifty-second Ann. 

 Rept. Nova Scotia Fruit Growers' Assoc, for 1916, Port Williams, 

 1916, pp. 85-111. [Received 22nd October 1918.] 



This paper reviews the life-histories, habits and methods of control 

 of the most injurious sucking insects that attack apples in Nova 

 Scotia. The species dealt with include Lygus com.munis novascotiensis 

 (green apple bug) [see this Review, Ser. A, iv, pp. 96 & 520 

 and V, p. 194]. Other species of which some account is given include 

 Aphis sorbi, Kalt. (rosy apple aphis). Aphis pomi, DeG. (green apple 

 aphis), Eriosofna lanigenmi, Hausm. (woolly apple aphis), various 

 scale-insects, and Eriophyes pyri (pear-leaf blister mite), all of which 

 have been dealt with in this Review. 



Sanders ((x. E). Results obtained at the Dominion Entomological 

 Laboratory during 1915.— Fifty-second Ann. Rept. Nova Scotia 

 Fruit Growers' Assoc, for 1916. Port Williams, 1916, pp. 112-129. 

 [Received 22nd October 1918.] 



Recurvaria nanella, Hb. (lesser bud-moth) which was first recorded 

 from Nova Scotia in 1915, is similar in life-history and habits to other 

 species of bud-moths common in Nova Scotia, but differs in the eft'ect 

 that the odour of sulphur sprays has upon it. Almost complete 

 control can be obtained by a late dormant or semi-dormant hme- 

 sulphur or soluble sulphur spray. Such a spray does not seem to kill 

 any larvae in their hibernating quarters, but when they emerge in 

 the spring the odour of these sprays causes them to drop to the ground 

 instead of attacking the opening buds. This species is a serious 

 pest in Europe on apple, pear, plum and peach, and as it has been 



