345 



Stookey (E. B.). Why does Red Clover Ml^.—Mthly Bull Western 

 Washington Exp. Sta., Puyallup, viii, no. 2, May 1920, pp. 18-20. 



The chief insect pest of clover in Western Washington is the root 

 borer [Hylastinus obscurus]. Damage by this beetle is done largely during 

 the second season of growth, reducing the crop and resulting in a very 

 poor stand in the following year. The eggs are laid in the spring in 

 and along the stem of the one year old plants. The larvae tunnel into 

 the roots, often entirely separating the root and the crown. They 

 pupate in July and August, reaching the adult stage in early autumn, 

 in which condition they pass the winter. The only method of control 

 is ploughing the infested fields. Tliis is best done immediately after 

 harvesting the first crop, as the larvae are then killed. Clover is thereby 

 hmited to one year in the crop rotation system, but this has been found 

 necessary in many parts of the United States. 



Frank (A.). Diseases and Insect Pests of Currants and Gooseberries. 



— Mthly. Bull. Western Washington Expt. Sta.. Puyallu}), \m, 

 no. 2. May 1920, pp. 29-31, 4 figs. 



The same insects attack both currants and gooseberries. An Aphid, 

 Mtjzus ribis, raises bhstered red areas on the leaves. Black-leaf 40, 

 a third of a pint to 50 U.S. gallons of water, should be sprayed on the 

 under-side of the fohage. The sawfiy, Pteronus ribesii, may be con- 

 trolled by spraying the leaves with lead arsenate, one pound of the 

 powder to 50 U.S. gallons of water, or if the fruit is about to be picked, 

 with fresh hellebore, one ounce to three gallons of water. Remedies 

 for the currant fruit maggot [Epochra canadensis) have already been 

 noticed [R.A.E., A, vi, 242]. Other common pests are flea-beetles and 

 Elaterids. 



Lakon (G.). Zur Systematik der Entomophthoreengattung Tarichium. 

 [The Systematics of the Entomophthoran Genus Tarichium.] — 

 Zeitschr. f. Pflanzenkrankheiten, Stuttgart, xxv, no. 5, 28th August 

 1915, pp. 257-272, 10 figs. [Received 10th June 1920.] 



The systematic position of the fungi of the genus Tarichium is 

 discussed with the object of estabhshiug a foundation for future studies 

 with reference to the artificial dissemination of fungi for the purpose 

 of insect control. 



SoRAUER ( — ). Die Wiederaufnahme der Seidenraupenzucht in 

 Deutschland. [The Resumption of Sericulture in Germany.] — 

 Zeitschr f. Pflanzenkrankheiten, Stuttgart, xxv, nos. 5 & 8, 28th 

 August 1915 & 21st March 1916, pp. 296-311 & 473-478, 

 14 figs. [Received 10th June 1920.] 



The advisabihty of re-estabhshing sericulture in Germany is dis- 

 cussed, and attention is also called to the danger of introducing 

 Aulacaspis (Diaspis) pentagona owing to the consequent cultivation of 

 mulberries. 



