394 



40 acres of cotton being destroyed, involving a loss of about £400. The 

 food-plants include Russian sunflower, A)itaranthus, lucerne, sorghum, 

 maize, beans and cotton, the latter being preferred in the field. For 

 outbreaks in the field the follo\A'ing bran mash proved to be the most 

 successful : 20 lb. wheat bran, 1 lb. Paris green, 1 qt. of syrup and 

 the juice of 3 lemons or one teaspoonful of anise oil. For large plants 

 a spray of 2 oz. lead arsenate to 3 U.S. gals, of water is recommended, 

 and would protect the crop at the same time from Lepidopterous 

 pests such as Loxostege similalis, Feltia spp. and Prodenia spp. 



Goodwin (W. H.). Japanese Flower Beetle. — Jl. Econ. Entom., 

 Concord, N.H., xii, no. 3, June 1919, pp. 247-252. 



Owing to the establishment of the Japanese flower beetle [Adorefus 

 umhrosus tenuimaculatus] in New Jersey over an area of from 4 to 5 

 thousand acres of productive sandy loam farms, active steps for its 

 eradication were taken in 1918, the plans for which and the subsequent 

 work are here described. Various experiments were made, during 

 which 1 oz. of sodium cyanide to 15 U.S. gals, of water distributed 

 over 25 square feet of ground gave the best results as a soil f umigant, 

 Idlhng 65 to 80 per cent, of the larvae in 3 days. Trap -lanterns 

 proved a complete failure. Dusting was also tried with from 15 to 

 24 lb. of lead arsenate to 100 lb. of lime, but the value of the result 

 was difiicult to ascertain. In the autumn the soil was treated with 

 1 oz. of sodium cyanide to 12 U.S. gals, of water, using from 15,000 

 to 25,000 U.S. gals, to the acre. 



The pest has certainly been reduced in luimbers as a result of these 

 measures, but for its successful eradication the work will have to be 

 continued in 1919, for which purpose new equipment is being secured. 



McCoLLocH (J. W.). Variations in the Length of the Flaxseed Stage of 

 the Hessian Fly. — Jl. Econ. Entom., Concord, N.H., xii, no. 3, 

 June 1919, pp. 252-255. 



Investigations to determine the duration of the life-cycle of the 

 Hessian fly [Mayetiola destructor] show that all stages are Hable to 

 vary in duration and that the maximum fluctuation is exhibited by 

 the flax-seed [pupal] stage. A table is given showing the extremes 

 of the different stages of the life-cycle, those for the pupal stage being 

 a minimum of 7 and maximum of 1,083 days. 



A great mmiber of pupae were collected, from which 7,461 adult 

 flies were reared ; the time between their collection and emergence 

 varied greatly, the two extremes being 2 and 1,083 days. Further 

 experiments are being made to determine whether the results are 

 similar under field conditions. The pupal stage certainly withstands 

 extreme weather conditions better than any other. 



Fluke (C. L.). Does Bordeaux Mixture repel the Potato Leaf-hopper ? 



—Jl. Econ. Entom., Concord, N.H., xii, no. 3, June 1919, pp. 

 256-257. 



A short account is given of experiments made with sprays consisting 

 of zinc arsenate and Bordeaux mixture against tip burn of potatoes 



