The Shipley Collection of Scientific Papers, Том 1641833 |
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Страница 44
... PLANT LICE . The members of this family comprise one of the most important groups of destructive insects known . Every one is familiar with the soft - bodied winged and wingless lice which gather so abundantly upon all sorts of plants ...
... PLANT LICE . The members of this family comprise one of the most important groups of destructive insects known . Every one is familiar with the soft - bodied winged and wingless lice which gather so abundantly upon all sorts of plants ...
Страница 44
... plant louse bodily into the air with the pointed end and suck out the juices ... lice is known to all . The red ladybird beetles ( Cycloneda sanguinea Linn ... plant lice . The eggs , larvæ , pupæ and adults are to be found ...
... plant louse bodily into the air with the pointed end and suck out the juices ... lice is known to all . The red ladybird beetles ( Cycloneda sanguinea Linn ... plant lice . The eggs , larvæ , pupæ and adults are to be found ...
Страница 246
... flower or honey flies . " On hot days they are sometimes very numerous and are called " sweat flies " in the Eastern States . They deposit their eggs singly upon leaves and twigs which are infested with plant lice and these give rise to ...
... flower or honey flies . " On hot days they are sometimes very numerous and are called " sweat flies " in the Eastern States . They deposit their eggs singly upon leaves and twigs which are infested with plant lice and these give rise to ...
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