The Shipley Collection of Scientific Papers, Том 1641833 |
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Страница 74
... caterpillars of the common Pine Sawfly ( Lophyrus pini ( See 4 , pp . 447-8 , fig . 10 , 583 , 607 ; 5 , p . 21 ) . In June , 1911 , Mr. A. C. Forbes noticed on pines at Avondale , Co. Wicklow , caterpillars from which flies of the ...
... caterpillars of the common Pine Sawfly ( Lophyrus pini ( See 4 , pp . 447-8 , fig . 10 , 583 , 607 ; 5 , p . 21 ) . In June , 1911 , Mr. A. C. Forbes noticed on pines at Avondale , Co. Wicklow , caterpillars from which flies of the ...
Страница 75
... caterpillars feeding until August . When numerous the caterpillars feed in clusters , and , in bad cases , the trees are completely stripped of leaves . When fully grown , the caterpillars descend to the ground , burrow into the turf ...
... caterpillars feeding until August . When numerous the caterpillars feed in clusters , and , in bad cases , the trees are completely stripped of leaves . When fully grown , the caterpillars descend to the ground , burrow into the turf ...
Страница 181
... caterpillars hatch in the spring and begin work upon the tender leaves and shoots , but rarely become abundant until early summer . When full grown the caterpillars are hairy , about one and three quarters inches long , black in color ...
... caterpillars hatch in the spring and begin work upon the tender leaves and shoots , but rarely become abundant until early summer . When full grown the caterpillars are hairy , about one and three quarters inches long , black in color ...
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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