32 MONTANA EXPERIMENT STATION BULLETIN 484 



CONTENTS 



INTRODUCTION 3 



GENERAL FEEDERS 4 



Grasshoppers 4 



1951 season 4 



1952 season 5 



Outlook for 1953 5 



OTHER IMPORTANT PESTS 5 



Mormon crickets 5 



Garden slugs 6 



White grubs 6 



Army cutworms 6 



Pale western cutworms 6 



Red-backed cutworms 6 



Wireworms 6 



Blister beetles 7 



Flea beetles 7 



Thistle butterfly caterpillars 7 



Field crickets 7 



European earwigs 8 



Spittlebugs 8 



Western chinch bugs 8 



INSECTS DESTRUCTIVE OF FIELD CROPS 8 



Small Grains 8 



Crested wheat plant bug 8 



Western wheat aphid 9 



English grain aphid 9 



Wheat stem sawfly 9 



Wheat stem maggot 10 



Wheat jointworm 10 



Grain thrips 1° 



A wheat head army worm 10 



A wheat leaf sawfly 10 



Corn 1 



European corn borer 1 



Corn earworm 1 



Bumble flower beetle 1 



Alfalfa and Clover 1 



Alfalfa seed chalcid 1 



Alalf a weevil 1 



Lygus bugs 12 



Sweetclover weevil 12 



Clover aphid 12 



Lesser clover leaf weevil 13 



Small milkweed bug 13 



