The Shipley Collection of Scientific Papers, Том 1641833 |
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Страница 159
... pupal stage , but some adults also hibernate . Control . The control of these insects has afforded difficult ... pupæ cases often greatly reduce the next year's broods . This is especially im- portant in pea fields . When the worms ...
... pupal stage , but some adults also hibernate . Control . The control of these insects has afforded difficult ... pupæ cases often greatly reduce the next year's broods . This is especially im- portant in pea fields . When the worms ...
Страница 226
... pupæ in the spring and after about two weeks emerge as adult insects . The larvæ and pupæ are usually found within a ... pupal stage is. FIG . 225.- Adoxus obscurus Linn . ( Original . ) FIG . 229. The grapevine hoplia ( Hop- lia ...
... pupæ in the spring and after about two weeks emerge as adult insects . The larvæ and pupæ are usually found within a ... pupal stage is. FIG . 225.- Adoxus obscurus Linn . ( Original . ) FIG . 229. The grapevine hoplia ( Hop- lia ...
Страница 13
... pupæ of the two species are very readily distinguished by the character of the last pupal envelope . In coloradensis ( Pl . IV , Figs . 53 and 54 ) this is pustulate like the semipupal envelope of viridis , the pustules appearing on the ...
... pupæ of the two species are very readily distinguished by the character of the last pupal envelope . In coloradensis ( Pl . IV , Figs . 53 and 54 ) this is pustulate like the semipupal envelope of viridis , the pustules appearing on the ...
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