511 



WooDWORTH (C. W.). Aphids on grain and Cantaloupes. — Univ. 

 California Agric. Coll., Berkeley, Circ. no. 125, January 1915, 

 4 pp., 1 fig. [Received 10th August 1915.] 



Aphis avenae and A.gossypii are serious pests in the Imperial Valley. 

 Sexual forms of A. avenae occur in the autumn in the northern sections 

 and the winter is passed in the egg stage. Parasites and predaceous 

 insects do not materially decrease the numbers of aphids in seasons 

 favourable to the latter. The cost of spraying, though an efficient 

 method of control, is generally considered prohibitive, when field crops 

 have to be treated. When the host plants become infested in the 

 spring, it is usual to find the insects limited to a few plants upon which 

 they become very numerous before spreading over the fields. In this 

 case, many growers sprinkle gasoline on infested plants and burn them, 

 which appreciably delays general infestation. 



QuAYLE (H. J.). Spraying for the Grape Leaf-hopper. — California 

 Umv. Agric. Coll., Berkeleij, Circ. no. 12G, March 1915, 6 pp., 

 2 figs. [Received 10th August 1915.] 



Typklocyba comes occurs in destructive numbers in the Sacramento, 

 San Joaquin and Imperial valleys. The insect passes the winter as 

 an adult, which may feed on various plants growing in the vineyard. 

 In spring, this pest feeds exclusively on the grape leaves. Nymphs 

 begin to hatch about 1st May in the Fresno section and two or three 

 weeks earlier in the Imperial Valley. The eggs require from 8 to 12 

 days to hatch and maturity is reached about 18 days later. There 

 are two generations in the year, the young of the second generation 

 appearing in the latter part of June. For the Fresno section, the time 

 for spraying is from 20th May to 10th June. [For spraying materials 

 and other methods of control, see this Revieiv, Ser. A, ii, p. 282.] 



Garcia (F.) & Rigney (J. W.). Onions, Spinach, Cauliflower and 



Casabas. — New Mexico Agric. Expt. Sla., State College, Las Cruces, 

 Bull. 92, January 1915, 41 pp., 8 figs. [Received 3rd August 1915.] 



The cabbage aphis (Aphis brassicae) is the most troublesome pest 

 of cauliflower in New Mexico. Kerosene emulsion has proved efi^ective 

 against it. The only remedy for the harlequin bug {Mnrgantia 

 histrionica) is hand-picking and destruction with kerosene. The use 

 of spraying materials for vegetables is not recommended ; thorough 

 cultivation should be sufficient to prevent insects from gaining a foot- 

 hold. The attack of an insect may frequently be prevented by growing 

 at a different season. 



Morrill (A. W.). Sixth Annual Report for the year ending June 30, 



1914. — Arizona Commiss. Agric. & Ilorlic, Phoenix, 21th Decem- 

 ber 1914, 47 pp., 11 figs., 3 plates. [Received 13th August 1915,] 



The inspection of imported nursery stock showed a marked decrease r 



with regard to insect and red spider infestations. Apples and pears 

 were in several cases infested by the codling moth {Cydia jJoinonella). 



