The Shipley Collection of Scientific Papers, Том 1641833 |
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INTRODUCTION . The Large Larch Sawfly1 ( Nematus erichsonii Hartig ) is the most serious insect which attacks the larch ( Larix spp . ) which in North America is also called the tamarack or hackmatak , these being the native Indian ...
INTRODUCTION . The Large Larch Sawfly1 ( Nematus erichsonii Hartig ) is the most serious insect which attacks the larch ( Larix spp . ) which in North America is also called the tamarack or hackmatak , these being the native Indian ...
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... larch being a deciduous tree . As the larch produces its leaves early in the season it naturally might be concluded that , by the time the leaves were removed by the sawfly larvæ , the trees would have stored sufficient reserve food ...
... larch being a deciduous tree . As the larch produces its leaves early in the season it naturally might be concluded that , by the time the leaves were removed by the sawfly larvæ , the trees would have stored sufficient reserve food ...
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... larch sawfly . Infection takes place in nature , no doubt , much earlier . " " Although none of my experiments were made under strictly natural conditions , that is to say in the open air , yet the observation that the fungus Isaria is ...
... larch sawfly . Infection takes place in nature , no doubt , much earlier . " " Although none of my experiments were made under strictly natural conditions , that is to say in the open air , yet the observation that the fungus Isaria is ...
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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