The Shipley Collection of Scientific Papers, Том 1641833 |
Из књиге
Резултати 1-3 од 69
Страница 65
... LOUSE . Macrosiphum citrifolii ( Ashm . ) . ( Fig . 58. ) General Appearance . A large green louse , about the size of and greatly resembling the destructive pea louse ( Macrosiphum destructor ) in color and shape . Under the microscope ...
... LOUSE . Macrosiphum citrifolii ( Ashm . ) . ( Fig . 58. ) General Appearance . A large green louse , about the size of and greatly resembling the destructive pea louse ( Macrosiphum destructor ) in color and shape . Under the microscope ...
Страница 81
... louse is usually mani- fested by the smutting of the walnut trees during the early summer months . Close examination ... louse works only upon the cul- tivated walnut . Natural Enemies . The most effective natural foe of this louse ...
... louse is usually mani- fested by the smutting of the walnut trees during the early summer months . Close examination ... louse works only upon the cul- tivated walnut . Natural Enemies . The most effective natural foe of this louse ...
Страница 84
... louse greatly resembles that of the mealy plum louse . The over - wintering eggs are laid upon the fruit trees in the fall . The spring broods breed and feed upon the leaves until the hops begin to appear . By this time winged forms ...
... louse greatly resembles that of the mealy plum louse . The over - wintering eggs are laid upon the fruit trees in the fall . The spring broods breed and feed upon the leaves until the hops begin to appear . By this time winged forms ...
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