34 MONTANA EXPERIMENT STATION BULLETIN 474 



Flea beetles 16 



Thistle butterfly caterpillars 16 



False chinch bugs 17 



Field crickets , 17 



Earwigs .' 17 



INSECTS DESTRUCTIVE OF FIELD CROPS 17 



Small Grains 17 



Crested wheat plant bug 17 



Western wheat aphid 17 



English grain aphid 18 



Spring grain aphid 18 



Say's stink bug 18 



Wheat stem sawfly 18 



Wireworms 19 



Alfalfa and Clover 19 



Alfalfa seed chalcid 19 



Alfalfa weevil 19 



Lygus bugs 19 



Sweet clover weevil 19 



Clover head aphid 19 



Lesser clover head weevil 20 



Pea aphid 20 



Potatoes 20 



Tuber maggot 20 



Psyllid and Colorado potato beetle 20 



Wireworms 20 



Sugar Beets 20 



Sugar beet root maggot 20 



Sugar beet root aphid 20 



Sugar beet webworm 21 



Flea beetles 21 



Spinach carrion beetle 21 



Peas and Beans 21 



Pea aphid 21 



Pea weevil 21 



Lateral leaf hopper 21 



Bean root aphid 22 



INSECTS DESTRUCTIVE OF GARDEN AND TRUCK CROPS 22 



Cruciferae 22 



Cabbage or radish maggot 22 



Imported cabbage worm 22 



Cabbage aphid 22 



Root Crops 22 



Onion maggot 22 



Asparagus 22 



Asparagus beetle 22 



INSECTS DESTRUCTIVE OF FRUIT CROPS 23 



Orchards 23 



Black cherry fruit fly 23 



Rust mites 23 



European red mites 23 



Pear slug 23 



Black cherrv aphid 23 



Codling moth 23 



Apple aphid 24 



Woolej' apple aphid 24 



