The Shipley Collection of Scientific Papers, Том 1641833 |
Из књиге
Резултати 1-3 од 54
Страница 580
... number of larvae are observed it is quite possible to preserve their identity by this method ; with large numbers a colour scheme naturally breaks down . It is believed that the observations set forth below were accurate ; others which ...
... number of larvae are observed it is quite possible to preserve their identity by this method ; with large numbers a colour scheme naturally breaks down . It is believed that the observations set forth below were accurate ; others which ...
Страница 246
... large numbers and greatly reduce their efficiency . Internal parasites also prey upon them . There are three species here which are doing good work in keeping down plant lice : a very large species , Lasiophthicus pyrastri Linn . , the ...
... large numbers and greatly reduce their efficiency . Internal parasites also prey upon them . There are three species here which are doing good work in keeping down plant lice : a very large species , Lasiophthicus pyrastri Linn . , the ...
Страница
... number by the workers reaching maturity during the same period within ... large colonies , containing thousands of workers and larvæ and dozens , or ... numbers that the opportunity for destroying them at once presented itself ...
... number by the workers reaching maturity during the same period within ... large colonies , containing thousands of workers and larvæ and dozens , or ... numbers that the opportunity for destroying them at once presented itself ...
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