The Shipley Collection of Scientific Papers, Том 1641833 |
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... attacked by a number of species of bark beetles belonging to the group of Scolytidæ or Ipidæ , the most destructive and deadly of all forest insects . Certain of the more common bark beetles attacking the larch in eastern Canada have ...
... attacked by a number of species of bark beetles belonging to the group of Scolytidæ or Ipidæ , the most destructive and deadly of all forest insects . Certain of the more common bark beetles attacking the larch in eastern Canada have ...
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... attacked has been as high as twenty - five per cent . Such a percentage of infection was observed by me in one locality in Cumberland in January , 1912. While this fungus is important practically , its widespread character would render ...
... attacked has been as high as twenty - five per cent . Such a percentage of infection was observed by me in one locality in Cumberland in January , 1912. While this fungus is important practically , its widespread character would render ...
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... attacking the currant and gooseberry Myzus ribis seems to be their best breeding ground . Last year , a notable ... attacked by Braconidae and Chalcididae to some extent , and so is Aphis grossulariae , but never to the same extent ...
... attacking the currant and gooseberry Myzus ribis seems to be their best breeding ground . Last year , a notable ... attacked by Braconidae and Chalcididae to some extent , and so is Aphis grossulariae , but never to the same extent ...
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