The Shipley Collection of Scientific Papers, Том 1641833 |
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Страница 65
... deposited on the branches of the cherry trees and previous fall . Throughout the entire summer only females appear which have the power to reproduce their like -- these being the destructive forms . In the fall , however , they give ...
... deposited on the branches of the cherry trees and previous fall . Throughout the entire summer only females appear which have the power to reproduce their like -- these being the destructive forms . In the fall , however , they give ...
Страница 15
... deposited on a single shoot appears to be about thirty . In the majority of cases , the slits are made only along one side of the young shoot and the eggs are placed alternately . In some cases , the eggs may be three or four abreast ...
... deposited on a single shoot appears to be about thirty . In the majority of cases , the slits are made only along one side of the young shoot and the eggs are placed alternately . In some cases , the eggs may be three or four abreast ...
Страница 30
... deposited in a single cocoon may be judged from the fact that in one case eighty - one eggs were counted on a single larva ; in another case forty - seven pupæ and adults were contained in a single cocoon . Five cocoons examined on May ...
... deposited in a single cocoon may be judged from the fact that in one case eighty - one eggs were counted on a single larva ; in another case forty - seven pupæ and adults were contained in a single cocoon . Five cocoons examined on May ...
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