The Shipley Collection of Scientific Papers, Том 1641833 |
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Страница 18
... destructive to alfalfa . Orchard trees and vineyards are also attacked , some trees and vines being completely defoliated and many killed . ( Fig . 17. ) General Appearance . This is one of the smaller hoppers , averag- ing about one ...
... destructive to alfalfa . Orchard trees and vineyards are also attacked , some trees and vines being completely defoliated and many killed . ( Fig . 17. ) General Appearance . This is one of the smaller hoppers , averag- ing about one ...
Страница 38
... destructive known . There are nearly twenty thousand species . The term Hemiptera comes from the fact that the fore wings of one of the suborders are thickened at the base , the tips being membranous and overlapping , thus appearing ...
... destructive known . There are nearly twenty thousand species . The term Hemiptera comes from the fact that the fore wings of one of the suborders are thickened at the base , the tips being membranous and overlapping , thus appearing ...
Страница 199
... destructive , the grubs and adults working throughout their entire existence . There are great numbers of destructive beetles and weevils in California but we can in- clude only a few of the more important ones . COCCINELLIDÆ. (. Family. ).
... destructive , the grubs and adults working throughout their entire existence . There are great numbers of destructive beetles and weevils in California but we can in- clude only a few of the more important ones . COCCINELLIDÆ. (. Family. ).
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