Insects Injurious to VegetablesO. Judd Company, 1907 - 262 páginas |
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Página 8
... females are furnished with stings , piercers or saws . In this order there are comparatively few noxious forms , and most of these are confined to the sawflies whose larvæ , known as slugs and false - worms , consume vegetation , doing ...
... females are furnished with stings , piercers or saws . In this order there are comparatively few noxious forms , and most of these are confined to the sawflies whose larvæ , known as slugs and false - worms , consume vegetation , doing ...
Página 60
... Female moth ; b , full - grown larva ; c , light form of larva , not quite mature ; d , cocoon ; e , pupa . All slightly enlarged . ( Author's illustration , U. S. Dept. Agr . ) naked caterpillars are more abundant and injurious , and ...
... Female moth ; b , full - grown larva ; c , light form of larva , not quite mature ; d , cocoon ; e , pupa . All slightly enlarged . ( Author's illustration , U. S. Dept. Agr . ) naked caterpillars are more abundant and injurious , and ...
Página 67
... Female beetle . ( Author's il- lustration , U. S. Dept. Agr . ) Fig . 37. - Three - lined blis- ter beetle ( Epicauta lemni- scata ) . ( Author's illustration , U. S. Dept. Agr . ) destructive potato pest of the East and , probably ...
... Female beetle . ( Author's il- lustration , U. S. Dept. Agr . ) Fig . 37. - Three - lined blis- ter beetle ( Epicauta lemni- scata ) . ( Author's illustration , U. S. Dept. Agr . ) destructive potato pest of the East and , probably ...
Página 70
... Female ovipositing : b , egg - pod extracted from ground , with end broken open ; c . a few eggs lying loose on ground ; d , e , earth removed , to illustrate egg - mass in place and one being placed ; f , where a mass has been covered ...
... Female ovipositing : b , egg - pod extracted from ground , with end broken open ; c . a few eggs lying loose on ground ; d , e , earth removed , to illustrate egg - mass in place and one being placed ; f , where a mass has been covered ...
Página 76
... females enter the earth for oviposition . The eggs , which are rather large and whitish or gray , are deposited singly in the ground . The grubs , hatching among the roots of grass and similar plants , feed at first upon the tender ...
... females enter the earth for oviposition . The eggs , which are rather large and whitish or gray , are deposited singly in the ground . The grubs , hatching among the roots of grass and similar plants , feed at first upon the tender ...
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Términos y frases comunes
abundant adult affected aphides appearance applied arsenicals asparagus attack Author's illustration bean weevil beans beet bill-bug bisulphid blister beetles Bordeaux mixture borer cabbage worm carrot caterpillars celery color Colorado potato beetle corn crops cucumber beetle cucurbits cultivation cutworms damage deposited destroy destructive eggs enlarged fall plowing farm farmers feed female fields flea-beetles fore-wings forms frequently fruit garden grasses grasshoppers ground grower grown habits hatch hibernation inch infested insect enemies insecticides insects INSECTS INJURIOUS kerosene kerosene emulsion killed larva larvæ leaf-beetles leafhoppers leaves less looper maggot melon aphis methods natural nearly numbers onion Paris green pea weevil pests plant-bug poisons potato beetle practical pupa remedies Riley root-worm roots season seed shown in figure soap soil sometimes species spray squash stage stalk stalk-borer striped surface sweet potato thrips tion tobacco tomato tortoise beetle tubers U. S. Dept vegetables webworm weeds white grubs wing expanse wireworms young plants
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