229 



Overdosing must be carefully avoided, as a sulphur dust mixture 

 tends to defoliate the trees and to crack the skin and flesh of the 

 fruit when applied too heavily. It is essential that the sulphur used 

 should be superfinely ground. 



OsKAMP (J.) & Woodbury (C. G.). Strawberry Varieties and Cultural 



Hints. — Purdue Univ. Agric. Expt. Sta., La Fayette, Ind., Bull, 

 no. 200, 16 pp., 14 figs. [Received 21st March 1918.] 



Insects damaging the strawberry include white grubs [Lachnostertia 

 spp.], which feed on the roots of a great variety of crops. In the case 

 of a bad infestation, the land should be ploughed and pigs or chickens 

 kept on it. The strawberry leaf-roller [Ancylis comptana], which 

 oviposits in early sj)ring, can be controlled by spraying 2 or 3 times 

 at intervals of a week with a solution of 2 lb. lead arsenate paste or 

 1 lb. powder to 50 U.S. gals, water. The plants should be cut and 

 the patch burned over as soon as the crop is harvested. The straw- 

 berry crown borer [Tyloderma fragariae] may be held in check by 

 suitable crop rotation, and also by burning over infested areas. Poisons 

 are useless against them. Sawflies, the larvae of which skeletonise 

 the leaves, and strawberry weevils [Anthonomus signatus], which 

 destroy the staminate flowers and feed on the pollen, may both be 

 controlled by thorough spraying with lead arsenate. 



OsKAMP (J.) & Woodbury (C. G.). Varieties of Blackberries and 

 Raspberries witli Notes on their Care. — Purdue Univ. Agric. Expt. 

 Sta., La Fayette, Ind., Bull. no. 201, August 1917, 12 pp., 6 figs. 

 [Received 21st March 1918.] 



Blackberries and raspberries are seldom attacked by leaf-eating 

 insects, but in the event of their appearance, spraying with lead 

 arsenate is an effective control. 



The crown borers, which attack the roots or canes near the ground, 

 can only be dealt with by examining each plant and destroying them 

 when found. Plants attacked by the cane borer [Oberea bimacvlata], 

 which girdles the young canes near the top, must be dealt with by 

 cutting off the affected canes below the girdle and burning them. 



OsKAMP (J.) & Woodbury (C. G.). Gooseberries and Currants. — Purdue 

 Univ. Agric. Expt. Sta., La Fayette, Ind., Bull. no. 207, August 

 1917, 11 pp., 10 figs. [Received 21st March 1918.] 



The four types of insects that attack gooseberries and currants 

 may be controlled as follows : — Scale-insects infesting the stems, by 

 a winter spray of concentrated lime-sulphur, 1 U.S. gal. to 8 U.S. 

 gals, water ; leaf-eating caterj^illars by poisoning with lead arsenate, 

 2 lb. paste, or 1 lb. powder, and 2 lb. lime to 50 U.S. gals, water ; 

 borers, by cutting out and burning all infested canes in the spring, 

 before the borers emerge ; Aphids, by spraying with nicotine sulphate, 

 1 fluid ounce tc 8 U.S. gals, water, with 4 oz. laundry soap added. 



