The Shipley Collection of Scientific Papers, Том 1641833 |
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Страница 41
... pest . The adult insect is pale yellowish - green in color , with white marking and is about one eighth of an inch ... pest in any locality , though occasionally it may do great damage . 14 Hert Food Plants . - As previously stated ...
... pest . The adult insect is pale yellowish - green in color , with white marking and is about one eighth of an inch ... pest in any locality , though occasionally it may do great damage . 14 Hert Food Plants . - As previously stated ...
Страница 245
... pest . Food Plants . Wheat is the crop most seriously injured by this pest and the damage done to that crop in the central wheat - growing states has been tremendous . It also works on Elymus sp . and Agrostis sp . Control . Fortunately ...
... pest . Food Plants . Wheat is the crop most seriously injured by this pest and the damage done to that crop in the central wheat - growing states has been tremendous . It also works on Elymus sp . and Agrostis sp . Control . Fortunately ...
Страница 282
... pest of crops , a brief account of it is herein included . General Appearance . The presence of this pest is told by such characteristic injuries as root knot on nursery trees , galls on tomato vines and the rough warty surface of ...
... pest of crops , a brief account of it is herein included . General Appearance . The presence of this pest is told by such characteristic injuries as root knot on nursery trees , galls on tomato vines and the rough warty surface of ...
Чести термини и фразе
abdomen abdominal segment adult antennæ ants aphid Aphis Appearance apple arsenic attacked body breeding brood buds California caterpillars cells cent citrus cocoons colonies color Commissioner cornicles cyanide damage deposited destructive Distribution dorsal early eggs Entomologist erichsonii Essig Family feed femora flies foliage Food Plants fruit fumigation gallons genus green hatch head hibernate History horticultural host inch long infested instabilis ladybird beetle larch Larch Sawfly large numbers larva larvæ lateral leaves legs Linn louse maggots male mealy bug mermithergates mites mosquitoes moth muscles Natural Enemies nest numbers observations Orasema orchards ovipositor P. C. Jr parasites Paris green pest Pheidole plant lice Plate Polyederkrankheit pound pseudogynes pupa pupæ pupal pupate quarantine Raupen sawfly scale insects southern species specimens spiracles spray spring stage summer surface thorax thrips Throughout the entire trees usually ventral winged female winter workers yellow young