316 



That the experience of Texas and Louisiana with the pink bollworm 

 [Plaft/edra gos.sypiello] emphasises the importance of each State doing- 

 systematic scouting work for such dangerous insect pests as the pink 

 bollworm, European corn borer, Oriental peach moth, sweet potato 

 weevil [Ci/las formicarius], etc. 



That it is apparent that there is need for crop pest control laws, 

 with the necessary funds to enforce them, in every State to enable 

 responsible authorities to deal promptly and effectively with dangerous 

 pests wherever they may become established. 



That while, in our opinion, a wide diversity in climatic conditions, 

 horticultural products and insect fauna makes impracticable the 

 application of uniform nursery inspection laws and regulations in all 

 the States of the United States, it is nevertheless desirable, in the 

 interests of increased horticultural development and the economical 

 administration of inspection measures, that such laws and regulations 

 be standardised in the Southern States, and uniformity therein secured 

 as far as may be possible. 



WoGi.TiM (E. S.) & Borden (A. D.). Control of the Citrophilus 

 Mealybug. — Separate from California Citroqraph, Los Anqeles, 

 May 1920. 1 p., Ifig. 



The history of the spread of the citrophilus mealy-bug [Pseudococcns 

 gahani] in California is reviewed. The remedial measures tried 

 in 1918, and repeated in 1919 [R.A.E., A, vii, 103] are described. In 

 addition to those already mentioned these include banding with burlap, 

 the destruction of the massed insects on the trunks by means of a 

 power spray and the use of an insecticide containing 40 lb. of soap, 

 10 U.S. gals, of distillate crude oil (28° to 30° Be.) and water to make 

 200 U.S. gals. If a lighter oil is used, the amount should be 

 increased to 15 U.S. gals. Bands should be removed before spraying 

 and dipped in pure distillate oil and replaced 2 or 3 days after 

 the treatment. In cases of very severe infestation the spray may have 

 to be repeated, but during the operations in 1919 a single application 

 proved adequate. Spraying should be done before the larvae migrate 

 to the branches. The liberation of natural enemies such as Cryptc- 

 laemus, Leiwopis, Chrysopa and Scymnus is advocated. 



Criddlf. (N.). Locust Control in the Prairie Provinces. — Canada 

 Depf. Agric. Ottawa, Circ. no. 13, 13th April 1920. 20 pj)., 

 6 figs. 



Mdanoplus atlantis. Riley, and Camnnla pellucida, Scudd., were 

 the most troublesome locusts during the recent infestation in Western 

 Canada [R.A.E., A, viii, 278]. The habits of the young and 

 adults and the breeding grounds selected by the different species are 

 discussed. The remedial measures advocated include burning weedy 

 patches and dead grass, etc., where the young hopj)ers shelter for the 

 night, ploughing and the use of poisoned baits. The natural enemies 

 of locusts include the locust flesh fly, Sarcophaga kellyi, Aid., the 

 locust bee fly, Anastoechus (Systoechus) oreas, 0. S., the larvae of which 

 feed on the eggs, Trombidium sp., which destroys the eggs, and a 

 fungus, Etnpusa sp. 



