507 



source are being studied and classified and the results Avill be published 

 later ; it is probable that several new species will be found among 

 them, and it is hoped that the introduction of some of these may be 

 of considerable assistance in checking the number of bagworras in 

 Argentina. 



Wellington (J. W.). Culture of the Globe Artichoke. — New York 

 Acjric. Exp. S(a., Geneva, Bull. no. 435, May 1917, pp. 311-319. 

 [Received 15th September 1917.] 



The only insect pest attacking the globe artichoke is a black Aphid, 

 which at times completely covers the under-sides of the leaves, 

 especially during midsummer. It may be controlled by spraying 

 thoroughly with a solution of 1 oz. of Black-leaf 4U and 4 oz. of whale-oil 

 soap in 8J U.S. gals, of water. It is necessary to spray both the lower 

 surfaces of the leaves and the crown of the plant. 



DoANE (R. W.). Notes on Mites attaciiing Orchards and Field Crops 

 in Utah. — Science, Lancaster, Pa., xlvi, no. 1182, 24th August 

 1917, p. 192. 



The most important mite attacking grain in Utah during 1915 and 

 1916 was Tetranychus telarius, L. {bimacidalus, Harv.). It has many 

 host-plants and in 1916 was so abundant that it defoliated cherry trees 

 and seriously attacked apricot, pear, plum and apple trees, raspberry 

 and currant bushes, peas, beans, tomatoes, and sugar beets, as well as 

 many ornamental plants. Maize suffered severely, the suckers and 

 lower leaves being first attacked ; while the heads of wheat, if they 

 developed at all, were small and poorly filled. Earlier in the season 

 wheat was attacked by two other species of mites, the clover mite, 

 Bnjohia pratensis, and Tetranychus longijjes, the jumping mite. Both 

 these mites were destructive to barley, oats and many wild grasses. 



MozNETTE (G. F.). The Cyclamen Mite. — Jl. Agric. Research, 

 Washington, D.C., x, no. 8, 20th August 1917, pp. 373-390, 

 2 plates, 6 figs. 



Tarsonemiis pallidus, Banl^s (cyclamen mite), which has been an 

 unimportant pest of cyclamen for some years in various States of 

 North America, has during recent years been increasing to a serious 

 extent and during 1916 caused a severe infestation in Oregon. It 

 seems probable that many of the diseases to which hothouse plants 

 are subject are due to various species of Tarsonemiis, such as 

 T. floricolus^ C. & F., on the leaves of a large variety of plants ; 

 T. spirifex, March., on oats ; T. cliironiae, Warb., on ferns, and T. tejn- 

 da riorum, Warb., on Chironia exigera, in England ; T. aminas, Tryon, 

 causing a disease of pineapples in Queensland ; T. cnlmicolus, Rent., 

 on grasses in Russia ; and T. waitei, Banks, destroying the terminal buds 

 of peaches. 



T. jpaUidus has so far been confined to a few host-plants ; while 

 showing a preference for cyclamen, it is found also on chrysanthemum 

 and on Antirrhinvm spp. (snapdragon). The young, tender leaves of 

 cyclamen are attacked and frequently curled into the appearance of 



