The Shipley Collection of Scientific Papers, Том 1641833 |
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Резултати 1-3 од 87
Страница 6
... leaves as soon as they appear in the spring . The eggs are deposited in holes bored into the under- sides of the leaves . The work of the young after hatching causes the galls or swellings . The destruc- tiveness continues throughout ...
... leaves as soon as they appear in the spring . The eggs are deposited in holes bored into the under- sides of the leaves . The work of the young after hatching causes the galls or swellings . The destruc- tiveness continues throughout ...
Страница 17
... leaves of the terminal shoots but always on the leaves inferior to these . When first they begin to feed , they do not completely eat the leaves , but nibble out portions along each side of a leaf which has , in consequence , a ...
... leaves of the terminal shoots but always on the leaves inferior to these . When first they begin to feed , they do not completely eat the leaves , but nibble out portions along each side of a leaf which has , in consequence , a ...
Страница
... leaf being outwards , as seen at br . , where the young leaves have begun to be inrolled . On the left - hand side of the figure a twig is seen , which has not yet been enclosed by a detritus casing . Here the leaves are more tightly ...
... leaf being outwards , as seen at br . , where the young leaves have begun to be inrolled . On the left - hand side of the figure a twig is seen , which has not yet been enclosed by a detritus casing . Here the leaves are more tightly ...
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