The Shipley Collection of Scientific Papers, Том 1641833 |
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Страница 41
... young apple trees ( preferably under bark of two or three years ' growth ) . These eggs hatch in the early spring so that the young nymphs and hiberating adults attack the first green foliage . During the summer , eggs are deposited in ...
... young apple trees ( preferably under bark of two or three years ' growth ) . These eggs hatch in the early spring so that the young nymphs and hiberating adults attack the first green foliage . During the summer , eggs are deposited in ...
Страница 65
... Young appear in the early spring on the young shoots and buds of the oleanders . Great colonies are soon produced , which continue throughout the early summer , when the natural enemies begin to appear . Winged and apterous forms may be ...
... Young appear in the early spring on the young shoots and buds of the oleanders . Great colonies are soon produced , which continue throughout the early summer , when the natural enemies begin to appear . Winged and apterous forms may be ...
Страница 65
... young which hatch from the eggs in the early spring give rise to all succeeding generations , and are known as " stem mothers " when fully developed . The first young are darker green than any of the succeeding broods . In seeking food ...
... young which hatch from the eggs in the early spring give rise to all succeeding generations , and are known as " stem mothers " when fully developed . The first young are darker green than any of the succeeding broods . In seeking food ...
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