A preliminary introduction to the study of entomologyTogether with a chapter on remedies, or methods that can be used in fighting injurious insects; insect enemies of the apple tree and its fruit, and the insect enemies of small grains . was done with specimens ofPig. 77.—Chinch-bug, show- ,, .. , , n i. i i. ii, ing the insect as it appeared the diseased bugs collected at tne ;t Station, and eighteensize. [After Lugger.] different places in southern Minne- sota were thus made centers of distribution for this disease, and,as it seems, with remarkably good results, as
A preliminary introduction to the study of entomologyTogether with a chapter on remedies, or methods that can be used in fighting injurious insects; insect enemies of the apple tree and its fruit, and the insect enemies of small grains . was done with specimens ofPig. 77.—Chinch-bug, show- ,, .. , , n i. i i. ii, ing the insect as it appeared the diseased bugs collected at tne ;t Station, and eighteensize. [After Lugger.] different places in southern Minne- sota were thus made centers of distribution for this disease, and,as it seems, with remarkably good results, as the disease haskilled off the bugs to such an extent that careful search in a ma-jority of places failed to produce a single living specimen, whilstthe traces of the disease were found everywhere. The diseasespread so rapidly that even corn fields growing near wheat fieldscrowded with Chinch-bugs were entirely protected, and no bugshad entered them in all the places visited by myself. Professor Snow, of the State University of Kansas, has beenvery successful in killing off the Chinch-bug by means of thesediseases which he succeeds in spreading over the country in in-fested regions. A number of reports that have been printed in. INSEC r ENEMIES OF SMALL GRAINS. 277 the various agricultural and other journals of the country willshow how entirely successful his remedy has proved. A shortextract from his first annual report on contagious diseases of theChinch-bug * will give the reader of the present paper in briefthe results of Professor Snows experiments. the white-fungus DISEASE. * [Sporotrichum globuliferum). During the earlier part of the season, especially during thewet period, the larger percentage of the reports observed wereobtained by the use of white-fungus infection. This, no doubt,is due to the conditions having been more favorable to this in-fection. As to the behavior of the infected bugs in the field, the fol-lowing notes have been taken: (1) The disease begins t
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1894
