314 



ground, green beans. In six tests out of seven the new bait worked 

 onsiderably better than the standard one, so that it can be considered, 

 at least quite as good and is about one shilling per acre cheaper. A 

 similar bait with three pounds of freshly ground clover substituted for 

 the beans a(;ted almost as well. No work was done to compare the 

 relative attractiveness or cost of the new bait with a bait made of bran 

 and poison only such as was used in Dr. Morrill's experiments [R.A.E., 

 A, vi, 304] with almost as much success as was obtained with the 

 molasses and lemons. Baits made with paper instead of bran are 

 more suitable in certain situations, wheie weeds aie tall, or where 

 poisoning of poultry or other birds is feared, although there is little 

 evidence of birds ever having been poisoned by the mixture. raj)er 

 soaked in soluble poisons did not give good results, but newspaper 

 soaked for half -an- hour in a mixture of one U.S. gal. of water, a (juarter 

 of a cup of molasses, two ounces of Paris green and one ounce of salt, 

 torn into pieces four inches S(piare and sown over a clover field at six 

 inch intervals, killed four times as many grasshoppers in two days as 

 were killed by the standard bait at ten pounds per acre. The paper 

 also retains its attractiveness for a much longer period though it is 

 particularly attractive when damp. 



Dean (G. A.) & Kelly (E. G.). Organization for Grasshopper 

 Control.— JL Earn. Entom., Concord, N.H., xiii, no. 2, April 1920. 

 pp. 237-242. 



The campaign against the infestation of grasshoppers in 1919 in 

 Kansas is described. After the measures in 1918 [R.A.E., A, vii, 284] 

 large numbers of eggs of Mdanoplns atlantis survived in undisked road- 

 sides and hedgerows, and by 1st June the grasshoppers were swarming, 

 everywhere. The farmers had been warned, but did not recognise 

 the danger till the insects had entered the wheat fields and after eating 

 the leaves crawled up the stalk and attacked the stem just below the 

 head. Hot sun and wind did the rest and by 29tli June one and a 

 half million bushels of wheat were lost. The grasshoppers then 

 attacked green oats and barley and caused more loss while the maize, 

 lucerne, and sorghum crops were threatened. An urgent call for 

 assistance was sent to the State Agricultural College, and measures 

 were set on foot at once. Under the Kansas grasshopper law, supplies 

 of poison were at once located and obtained, and the forces in each 

 county organised for work under the county agents or representatives 

 of the College. The amount of material for each township was estimated 

 and distributed, and the township trustees made responsible for its 

 apphcation. 



The results were excellent throughout. Poisoning the grasshoppers 

 at this time also protected the autumn wheat and no reports of injury 

 to this crop were received. 



McCoLLOCH (J, W.). A study of the Oviposition of the Corn Earworm 

 with relation to Certain Phases of the Life Economy and Measures 

 of Control. — Jl. Econ. Enlom., Concord, N.H., xiii, no. 2, April 

 1920, pp. 242-255. 

 The following summary of this paper on the corn earworm, Heliothis 

 {Chloridea) obsoleta, F., is given by the author : — A study of the ovi- 

 position of the corn earworm on different varieties of maize plants^ 



