The Shipley Collection of Scientific Papers, Том 1641833 |
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Страница 159
... hibernate . Control . The control of these insects has afforded difficult problems for years , and even to - day the ... hibernating pupæ cases often greatly reduce the next year's broods . This is especially im- portant in pea ...
... hibernate . Control . The control of these insects has afforded difficult problems for years , and even to - day the ... hibernating pupæ cases often greatly reduce the next year's broods . This is especially im- portant in pea ...
Страница 170
... hibernating larvæ after August . These over - wintering caterpillars make minute burrows in the bark in which to hibernate . They are very small but their chambers are quite easily located by the minute piles of frass above ( Fig . 154 ) ...
... hibernating larvæ after August . These over - wintering caterpillars make minute burrows in the bark in which to hibernate . They are very small but their chambers are quite easily located by the minute piles of frass above ( Fig . 154 ) ...
Страница 227
... hibernate during the winter under any protective covering and appear in the spring about the time the young ... hibernating beetles . Natural Enemies . The young of the ladybird beetles , Megilla macu- lata and Hippodamia ...
... hibernate during the winter under any protective covering and appear in the spring about the time the young ... hibernating beetles . Natural Enemies . The young of the ladybird beetles , Megilla macu- lata and Hippodamia ...
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