The Shipley Collection of Scientific Papers, Том 1641833 |
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Страница 65
... early spring on the young shoots and buds of the oleanders . Great colonies are soon produced , which continue throughout the early summer , when the natural enemies begin to appear . Winged and apterous forms may be found in nearly ...
... early spring on the young shoots and buds of the oleanders . Great colonies are soon produced , which continue throughout the early summer , when the natural enemies begin to appear . Winged and apterous forms may be found in nearly ...
Страница 147
... early in the spring , as soon as the adults appear and begin egg - laying . The vines are so tender that spraying is impracticable . The bugs may be trapped by placing through the garden , boards , pieces of bark or similar material ...
... early in the spring , as soon as the adults appear and begin egg - laying . The vines are so tender that spraying is impracticable . The bugs may be trapped by placing through the garden , boards , pieces of bark or similar material ...
Страница 171
... early spring upon the young buds and shoots and during the summer on these , and on the fruit . The twigs are also attacked . In all cases the larvæ enter near the tip and work toward the base . During the early spring the young start ...
... early spring upon the young buds and shoots and during the summer on these , and on the fruit . The twigs are also attacked . In all cases the larvæ enter near the tip and work toward the base . During the early spring the young start ...
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