284 



ject of " The Weevil," meaning, in-esuinably, tlie " Fly Weevil," or 

 Aiigoumois Grain Motli {Gelechia cerealeUa.) The author falls into the 

 common error of considering that it is necessary for the moth to punc- 

 ture the grain to oviposit, and that consequently this must be done 

 when the corn is " in the milk," considering it to be unproven that the 

 insect will propagate in hard corn. Nevertheless, his experience is in- 

 teresting as showing that the common practice of pulling fodder in July 

 results iu preventing the shuck from adhering naturally to and cover- 

 ing the ear, thus aifording the moths a sure entrance to the grain for 

 oviposition. In the same way he believes that the final working of the 

 crop in common i)ractice in Florida is apt to produce a similar effect. 

 His remarks are based upon three years' experience, and the sugges- 

 tions are certainly worthy of test. 



INJURY TO FOLIAGE BY ARSENITES. A CHEAP ARSENITE. COMBI- 

 NATION OF ARSENITES AND FUNGICIDES. 



In Technical Bulletin Xo. lib, of the Xorth Carolina Experiment 

 Station,* Mr. B. W. Kilgore, assistant chemist of the station, gives the 

 results of his investigations of the cause and prevention of injury to 

 foliage by arsenites, and of experiments in combining arseuites with 

 fungicides. In this work Mr. Kilgore has gone over much the same 

 ground covered by Mr. Gillette in Bulletin No. 10 of the Iowa Station, 

 and by Mr. Woodworth in Bulletin No. 14 of the Arkansas Station. 

 Some of the conclusions reached are as follows: 



That soluble arsenic compounds cause ''burning" or " scorching" ta 

 foliage, the injury being in direct i)roportion to the quantity of these 

 compounds present. 



That the addition of lime to Paris green or London purple mixtures,, 

 used to prevent this injury may be applied with as great safety ten 

 days after as one hour after mixing, because all soluble arsenites in 

 London purple and Paris green are changed almost immediately by 

 lime into insoluble arseuite of lime. 



That white arsenic mixture should be permitted to stand for some time 

 before application to foliage, for the reason that several days are re- 

 quired to completely change it to insoluble arseuite. This change may 

 be tacilitated by treating the mixture with boiling water, which fact 

 he has utilized in the preparation of a cheap arseuite described below. 



That Bordeaux mixture pi^events the solubility of the arsenites hy 

 virtue of its lime, hence this fmngicide may be safely applied in com- 

 bination with London j)urple and Paris green. 



The arsenites combined with Eau Celeste are not safe to use on foli- 

 age, because of their solubility in this fluid. 



"Ou the Cause and Preveution of the Injury to Foliage by Arseuites, together with a- 

 new and cheap Arseuite, and Experimeuts on Comhining Arseuites with Fungicides. 

 By B. W. Kilgore, North Carolina Agricultural Experiment Station, Bulletin No. 77 1 ; 

 Technical Bulletin No. 2; July 1, 1891. 



