Annual report of the Agricultural Experiment Station of the University of Minnesota . Pig. 43.—Gortyna nitcla Gu. Prom Div. of Entomology, Dept. of Agriculture. aster, dahlia, castor bean; in. short any plant with soft center isapt to suffer. It is even reported as attacking twigs of apple,peach, currant, etc., and is to be classed as a general nuisance. Mr. Freeman of the University has identified this fungus as Svoriasspongiosa, Schw. Harshberger, in Vol. C of the Journal of Mycology,reports it as occurring in the honey dew of Schizonevra imbricata. foundon the Beech. FNSECTS INJURIOUS IN 19
Annual report of the Agricultural Experiment Station of the University of Minnesota . Pig. 43.—Gortyna nitcla Gu. Prom Div. of Entomology, Dept. of Agriculture. aster, dahlia, castor bean; in. short any plant with soft center isapt to suffer. It is even reported as attacking twigs of apple,peach, currant, etc., and is to be classed as a general nuisance. Mr. Freeman of the University has identified this fungus as Svoriasspongiosa, Schw. Harshberger, in Vol. C of the Journal of Mycology,reports it as occurring in the honey dew of Schizonevra imbricata. foundon the Beech. FNSECTS INJURIOUS IN 1902. 47 I obtained pupae from hollyhocks on the nth of August, theadult emerging from them in the breeding cage Sept. 7th. Theyoung Caterpillar on emerging is purplish with light stripes run-ning along its body. As it gets older it becomes duller colored,and about midway of its length the color is such as to make thatpart appear Fig. 44.—Tbe larva of the Stalk Borer, enlarged. Mr. T. L. Libbey of 8th St. S. E. Minneapolis, whose to-matoes were sorely threatened last summer, hit upon an ingeniousmethod of killing the borer without injuring the vine. He hadtried to reach the borer by introducing a wire into the mouth ofits burrow, but found that the stem was so irregular in its growththat it was bruised and injured by this process. He then triedchloroform, injecting with a medicine dropper about one teasooon-ful into the burrow and plugging the hole with cotton that thefumes might be retained in the burrow. This worked like acharm, killing the borer and beyond a slight browning of the vineat the point of application, no injury was occasioned. The use of noxious gases such as those of chloroform and themore universally used bisulphide of carbon to kill fruit pests arebecoming quite common. The latter gas has been used success-fully in California against the Peach Tree Borer and no doubtwould have been as effic
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