The Shipley Collection of Scientific Papers, Том 1641833 |
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Страница 36
... damage upon the leaf and flower buds as well as the young fruit . The initial damage is done just before or after blossom- ing time . The pear suffers probably more than any other tree due to ravages of this insect , although prunes and ...
... damage upon the leaf and flower buds as well as the young fruit . The initial damage is done just before or after blossom- ing time . The pear suffers probably more than any other tree due to ravages of this insect , although prunes and ...
Страница 230
... damage . They also act as carriers of the bacterial wilt disease of cucumbers . Distribution . Throughout the State . Not as common as Diabrotica soror but enough so to do much damage . Food Plants . - Squashes , cucumbers , cantaloupes ...
... damage . They also act as carriers of the bacterial wilt disease of cucumbers . Distribution . Throughout the State . Not as common as Diabrotica soror but enough so to do much damage . Food Plants . - Squashes , cucumbers , cantaloupes ...
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DAMAGE CAUSED BY RIBES APHIDES . The Ribes feeding Aphides frequently cause very serious loss to fruit growers all over Britain , and three species at least are extremely difficult to deal with , spraying being quite useless against ...
DAMAGE CAUSED BY RIBES APHIDES . The Ribes feeding Aphides frequently cause very serious loss to fruit growers all over Britain , and three species at least are extremely difficult to deal with , spraying being quite useless against ...
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