174 



infestation. A further search for additional natural enemies in Europe 

 and the reintroduction of some of the species that have not been 

 recovered in New England might result in valuable assistance against 

 this pest. The brown-tail moth [Nygmia phaeprrhoea] had been 

 relatively scarce during the past five years, owing partly to its natural 

 enemies, especially imported parasites, but its numbers increased 

 during the summer of 1921. 



Among southern crop pests the cotton boll- weevil [Anthonomtis 

 grandis] was treated by dusting with dry powdered calcium arsenate 

 on a large scale, 75,000 acres of cotton being dealt with. A brief 

 summary of rules for poisoning has been issued, and is widely used 

 by the farmers. The tobacco horn worm [Protoparce] remained the 

 most important tobacco pest in Kentucky and Tennessee, and a mule 

 duster, especially adapted for treating two rows of tobacco at the 

 same time, has been constructed and is being perfected. In the 

 Georgia and Florida tobacco belts dusting and spraying served, in 

 conjunction with weather conditions, to reduce to a minimum the 

 damage done by the tobacco flea-beetle [Epitrix parvuld] and tobacco 

 thrips [Frankliniella ftisca]. 



The collection was continued of Tachinid parasites of the sugar- 

 cane moth borer [Diatraea saccharalis] in Cuba and their shipment 

 to Louisiana ; there is evidence that they will prove valuable in 

 control. To avoid the destruction of the native egg-parasite, the 

 leaves left on the cane field are not burned, but ploughed under ; 

 this also improves the soil. 



A summary is given of the work in connection with pests of citrus 

 fruit in California and Florida ; pests of mango, avocado, and other 

 subtropical fruits ; greenhouse insects, including Chrysomphalus 

 biformis on orchids, and the oleander black scale, Saissetia oleae ; 

 Mediterranean fruit-fly [Ceratitis capitata] and melon fly [Dacus 

 cuacrbitae] ; and pests of forest and shade trees. Bee-culture investi- 

 gations are reported on. There is a brief account of the insect pest 

 survey instituted with the object of collecting scientific data on insect 

 conditions throughout the Union and of issuing a bulletin on the insect 

 conditions of the preceding month [cf. R. A.E., A, x, 98]. 



MiNANGOiN (N.). La Lutte centre la Mouche de I'Orange {Ceratitis 

 capitata). — Rev. Agric. Afr. Nord., Algiers, xx, no. 130, 27th 

 January 1922, pp. 62-64, 2 figs. 



The poison bait mixture here recommended for Ceratitis capitata 

 consists of a small amount of preserved figs boiled in water until 

 reduced to pulp, and water containing sodium arsenite at the rate 

 of about J ounce to If pints. The flasks to be hung in the trees 

 should be two-thirds fufl. For trees of about 15 to 20 years one is 

 sufficient, but two should be hung in older trees. The attractiveness 

 of the mixture may be increased by the addition of a little orange 

 juice. 



VAN Warmelo (H.). Vigna oligosperma als Grondbedekker in de 



Thee. [V. oligosperma as a Ground Cover Plant for Tea. J — 

 De Thee, Bnitenzorg, ii, no. 4, December 1921, pp. 103-107. 



The title of this paper indicates its contents. In an additional 

 note. Dr. C. Bernard states that in his district Vigna oligosperma 

 remained untouched by Helopeltis infesting the tea amongst it. It 

 was also uninjured by Chrysomelid beetles, though these have been 

 known to attack this cover crop elsewhere. 



