Annual report of the Agricultural Experiment Station of the University of Minnesota . by the thousands on the front of anunfinished store in the Hill River Districl on a rainy day. oily corpses dumped upon the road, the pests appeared to be al-most as numerous after treatment as before. INSECTS INJURIOUS IN 1902. 21 With the exception of a slight outbreak near Twin Valley inNorman county, which the Entomologist found to be not serious,an early and limited attack near Glyndon in Clay county and thecrisis at Perham which was promptly met by plowing, Gentillyand the Hill River district were the o
Annual report of the Agricultural Experiment Station of the University of Minnesota . by the thousands on the front of anunfinished store in the Hill River Districl on a rainy day. oily corpses dumped upon the road, the pests appeared to be al-most as numerous after treatment as before. INSECTS INJURIOUS IN 1902. 21 With the exception of a slight outbreak near Twin Valley inNorman county, which the Entomologist found to be not serious,an early and limited attack near Glyndon in Clay county and thecrisis at Perham which was promptly met by plowing, Gentillyand the Hill River district were the only places known to be seri-ously affected. As stated above the Lesser Migratory or White MountainLocust was the offender and was practically the only locust foundon the stubble. In grass and other rank growth (in one instancein a clover field in large numbers and also in timothy) I found theTwo Striped Locust M. bivitattus (see colored plate) ; some fewspecimens of Chortophaga viridifasciata (Fig. 14), have also beenseen and later the always numerous Red-legged Locusts, M. femur. Fig-. 14.—Chortophaga viridifasciata, form virginiana, female. Lugger. rubrum. The usual quota of Carolina Locusts so often mistakenfor the Rocky Mountain species were observed everywhere. In July I visited this locality again. All the grain had headedbut was still in the milk. I then found the hoppers winged andin enormous numbers about one-half mile south of where I hadfirst seen them. They were feeding upon the soft wheat kernelsand four out of every ten heads of wheat were being preyed uponby hungry individuals. As far as one could see and observe suchsmall objects in looking out over the grain, grasshoppers couldbe distinguished by the thousand (see Fig. 11) and it is in thestubble here later, undoubtedly, that eggs were laid. I also learnedat this time that the pests had spread further west beyond thebroken belt of timber which had formed a temporary westernbarrier. My last trip to Hill River
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectagriculture, bookyear
