620 



blossoms was 75 per cent. By the use of the second and third spray^ 

 the number of moths was reduced by GO" 75 per cent. Observations 

 during June showed that 72-48 per cent, of young fruit injured by 

 fruit worms dropped before maturity. The second and third spray 

 reduced this injury by 65-19 per cent. The 12 plots averaged 44-7 

 per cent, bud-moth infestation in the buds and 9-5 per cent, of the 

 leaves showed injury. The most marked results w^ere in all cases 

 obtained from the second and third sprays. The cost of these sprays 

 in Nova Scotia is, on the average, 2|rf. per barrel. The results 

 recorded did not take into account any benefit derived from black 

 spot control. 



Bryson (J. M.). Troublesome Rose Pests and their Cure. — Canadian 

 Horticulturalist, Peterboro, Ont, xxxviii, no. 7, July 1915, 

 pp. 171-172. 



The carpenter bee causes serious injury to roses by mining in the 

 shoots during the larval stage. The only method of control is to cut 

 the shoot below the afEected region, or in cases of bad infestation, to 

 destroy the bush. The insect is most prevalent during June and July 

 and again in October. Green and brown aphis, attacking the leaves 

 in June and July, are readily controlled by spraying with whale-oil 

 soap, at the rate of | lb. to 5 gals, water. Sawflies are destroyed 

 by the use of hellebore powder, 1 oz. in 4 gals, water, together with 

 a small quantity of molasses. The rose beetle, attacking young buds, 

 can only be removed by hand-picking. 



Strickland (E. H.). Poisoned Bait for Cutworms. — Canadian Entomo- 

 logist, London, Ont., xlvii, no. 7, July 1915, pp. 201-204. 



Experiments conducted by the author at the Dominion Entomo- 

 logical Laboratory at Lethbridge, Alberta, during the past two years 

 upon the control of the cutworms, Porosagrotis orthogonia and Euxoa 

 ochrogaster, and again this spring upon a species of Euxoa (Chorizagrotis), 

 have proved that shorts [see this Review, Ser. A, iii, p. 564] are far 

 more valuable than bran as a poison bait. Under the semi-arid 

 conditions of a region where there is no dew at night, it seems impossible 

 to obtain a bran mixture that will remain sufficiently attractive after 

 it has lost its moisture, some fifteen minutes after its application to 

 the heated soil. The following formula gives the best results in the 

 control of E. ochrogaster and P. orthogonia : Shorts, 50 lb ; molasses, 

 h gal. ; Paris green, 1 lb., and water, 2| gals. This costs from 4s. 

 to OS. per acre for the ingredients alone, but since cutworms nearly 

 always begin to do damage in small, well-defined areas, from which 

 they subsequently spread, prompt treatment, as soon as damage is 

 seen, reduces the cost per acre of the area saved to a small figure. 

 For E. ochrogaster the unharrowed plots gave slightly better results 

 than the harrowed, and it was observed that this species feeds more 

 frequently above the ground than does P. orthogonia. The superiority 

 of shorts over bran has been again established in the control of army 

 cutworms, Evxoa agrestis, which invaded part of Alberta early this 

 year. Owing to the migratory habits of this species, results from field 

 experiments are rather uncertain ; definite results were obtained in 



