46 



It seems necessary in view of these conclusions that some further 

 measure should be taken that would destroy the caterpillars on the 

 ground and on the plants or jTrevent them from ascending the vines. 

 It is hoped that investigations will be made to determine a method 

 for doing this. It is remarked with regard to humidity that only a 

 prolonged inundation such as those of 20th May 1917 and 7th May 1918, 

 when the vine-stocks were under water for 2 or 3 days, is sufficient to 

 kill all the caterpillars. 



BoNET (J.). La Cochylis et TEud^mis vaincues. [Clysia ambiguella 

 and Pohfchrosis hotrana conquered.] — Progres Agric. Vitic, 

 Montpellier, Ixx, no. 43; 27th October 1918, p. 395. 



The complete success of the following treatment of vines against 

 Clysia ambiguella and Polyclirosis hotrana is vouched for by several 

 vine-growers. The grapes should be absolutely covered with a dust 

 spray of quick-lime, as fresh as possible, before the 10th June, again 

 before 10th July and again before 5th August. It is said that the 

 larvae of these moths do not touch grapes so treated, while the forma- 

 tion of mildew and fungous diseases is also prevented by the lime. 



GoDET (C). Rapport sur 1' Activity de la Station d'Essais viticoles k 

 Auvernier en 1917. [Report on the Work of the Experiment 

 Station of Vine-growing at Auvernier in 1917.] — Annuaire Agric, 

 Suisse, Berne, xix, no. 2, 1918, pp. 196-218, 10 figs. 



Clysia ambiguella caused great damage in some localities during 

 1917 and even the vines in the Experiment Station did not escape 

 in spite of two nicotine treatments. It is estimated, however, that 

 crops have been increased by about 40 per cent, by the remedial 

 measures undertaken. Titrated nicotine was mixed with ordinary 

 Bordeaux mixture in the proportion of 1 : 100 for these sprays, which 

 are applied by a hose with a bent jet. Experiments have been made 

 with various other insecticides, the results of which are given in a 

 table. Several of these were effective and caused a considerable 

 increase in the crop. Golazine I (non-miscible with Bordeaux mixture) 

 gave the best results. Light-traps with acetylene lamps were also 

 tried ; it is difficult to judge the efficacy of these and further tests are 

 desirable. 



Davis (J. J.). The Control of Three Important Wheat Pests in Indiana. 



— Purdue Univ. Agric. Expt. Sia., Lafayette, Ind., Circ. no. 82, 

 August 1918, 11 pp., 6 figs. 



The two important insect pests of wheat in Indiana are the joint- 

 worm [Isosoma tritici] and Hessian fly [Mayetiola destructor]. They 

 occur throughout the State, but chiefly in the wheat belt of southern 

 Indiana. A third wheat pest which usually occurs in northern Indiana 

 and which was unusually destructive during 1917 is the wheat midge 

 [Contarinia tritici]. 



Isosoma tritici has but one brood annually and affects the wheat 

 in the spring only, causing a hardening of the stem at the point where 

 the egg is deposited. The larva, developing in the stem, causes the 

 stalk to bend and fall above the point of infestation, which varies 



