The Shipley Collection of Scientific Papers, Том 1641833 |
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Страница 318
... FUMIGATION . Fumigation consists in the generation and uses of gases to kill destruc- tive insect pests . Formerly such practices were limited to the uses of carbon bisulfid , sulphur dioxid and tobacco fumes . The use of hydro- cyanic ...
... FUMIGATION . Fumigation consists in the generation and uses of gases to kill destruc- tive insect pests . Formerly such practices were limited to the uses of carbon bisulfid , sulphur dioxid and tobacco fumes . The use of hydro- cyanic ...
Страница 334
... FUMIGATION . The spread of scale insects in citrus orchards is very rapid and under ordinary methods of fumigation , where only part of a district is treated each year , there is always a source of re - infestation from the trees which ...
... FUMIGATION . The spread of scale insects in citrus orchards is very rapid and under ordinary methods of fumigation , where only part of a district is treated each year , there is always a source of re - infestation from the trees which ...
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... fumigation . One of the best methods for the destruction of the adults or flies in their occurrence in mushroom houses is fumigation with tobacco or nicotine fumigants such as are used in greenhouses . These should be used in accordance ...
... fumigation . One of the best methods for the destruction of the adults or flies in their occurrence in mushroom houses is fumigation with tobacco or nicotine fumigants such as are used in greenhouses . These should be used in accordance ...
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