The Shipley Collection of Scientific Papers, Том 1641833 |
Из књиге
Резултати 1-3 од 62
Страница 44
... aphis and the black peach aphis , but both of these have aerial generations . The beet aphis ( Pem- phigus betæ Doane ) and ( Trifidaphis radicicola Essig ) are not known to be other than strictly subterranean in their habits . In ...
... aphis and the black peach aphis , but both of these have aerial generations . The beet aphis ( Pem- phigus betæ Doane ) and ( Trifidaphis radicicola Essig ) are not known to be other than strictly subterranean in their habits . In ...
Страница 65
... aphis and black peach aphis ; neither do winged sexual forms appear as in the case of some other species . Distribution . Common throughout the entire State . A serious pest in the central and northern parts . Food Plants . The host ...
... aphis and black peach aphis ; neither do winged sexual forms appear as in the case of some other species . Distribution . Common throughout the entire State . A serious pest in the central and northern parts . Food Plants . The host ...
Страница 248
... aphis ( Aphis persica - niger Smith ) , the melon aphis FIG . 243. The American syrphid fly , Syrphus ameri- canus Wied . ( Essig , P. C. Jr. Ent . ) ( Aphis gossypii Glover ) , the green citrus aphid ( Macrosiphum citrifolii Ashm ...
... aphis ( Aphis persica - niger Smith ) , the melon aphis FIG . 243. The American syrphid fly , Syrphus ameri- canus Wied . ( Essig , P. C. Jr. Ent . ) ( Aphis gossypii Glover ) , the green citrus aphid ( Macrosiphum citrifolii Ashm ...
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