Insects Injurious to VegetablesO. Judd Company, 1907 - 262 páginas |
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Página x
... destructive to planted seed are wireworms and root - maggots , and in some cases insects that have fed on the seed stock while in store are planted with the seed , and this they destroy by eating out the germ . Familiar ex- amples are ...
... destructive to planted seed are wireworms and root - maggots , and in some cases insects that have fed on the seed stock while in store are planted with the seed , and this they destroy by eating out the germ . Familiar ex- amples are ...
Página 1
... destructive to one species , would not affect a different insect , and so on . In short , a knowledge of economic entomology beyond the fact that arsenicals are the proper remedies for mandibulate or chewing insects , and that kerosene ...
... destructive to one species , would not affect a different insect , and so on . In short , a knowledge of economic entomology beyond the fact that arsenicals are the proper remedies for mandibulate or chewing insects , and that kerosene ...
Página 7
... destructive to vegetable crops are found in the cutworms , army worms , webworms , cabbage and tomato worms and various caterpillars . The cab- bage looper is shown in figure 9 in its four principal stages . Hymenoptera ( Sawflies ...
... destructive to vegetable crops are found in the cutworms , army worms , webworms , cabbage and tomato worms and various caterpillars . The cab- bage looper is shown in figure 9 in its four principal stages . Hymenoptera ( Sawflies ...
Página 19
... destructive to cabbage will attack any cole crop , such as turnip or radish , and weeds such as wild mustard and pepper - grass ; hence care should be used not to plant cabbage in fields in which the other plants have grown . The same ...
... destructive to cabbage will attack any cole crop , such as turnip or radish , and weeds such as wild mustard and pepper - grass ; hence care should be used not to plant cabbage in fields in which the other plants have grown . The same ...
Página 22
... destructive insects , if we except the employment of insecticides , consists in the observance of clean cultural practice , and when with this we combine the judicious use of other methods , including me- chanical ones , only moderate ...
... destructive insects , if we except the employment of insecticides , consists in the observance of clean cultural practice , and when with this we combine the judicious use of other methods , including me- chanical ones , only moderate ...
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Términos y frases comunes
abundant adult affected aphides appearance applied arsenicals asparagus attack Author's illustration bean weevil beans beet bill-bug bisulphid blister beetles Bordeaux mixture borer cabbage worm carrot caterpillars celery color Colorado potato beetle corn crops cucumber beetle cucurbits cultivation cutworms damage deposited destroy destructive eggs enlarged fall plowing farm farmers feed female fields flea-beetles fore-wings forms frequently fruit garden grasses grasshoppers ground grower grown habits hatch hibernation inch infested insect enemies insecticides insects INSECTS INJURIOUS kerosene kerosene emulsion killed larva larvæ leaf-beetles leafhoppers leaves less looper maggot mature melon aphis methods natural nearly numbers onion Paris green pea weevil pests plant-bug poisons potato beetle practical pupa remedies Riley root-worm roots season seed shown in figure soap soil species spray squash stage stalk stalk-borer striped surface sweet potato thrips tion tobacco tomato tortoise beetles tubers U. S. Dept vegetables webworm weeds white grubs wing expanse wireworms young plants
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