Spraying Crops: Why, When, and howO. Judd Company, 1907 - 136 páginas |
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Términos y frases comunes
50 gallons acre Agitating Device appear apple application arsenate of lead arsenical poison arsenites attacks barrel become full-grown beetles blight blossoms boiling Bordeaux mixture brown BROWN ROT buds cabbage caterpillars change to pupae cherry cocoons codling moth color copper sulphate crop currant destroyed by spraying destructive develop dilute dissolved DOWNY MILDEW emulsion Experiment Station feed foliage fruit fungi fungicides fungous disease FUNGUS ENEMIES gallons of water gallons water grapes hatch Illustrated inch long infested injury INSECT ENEMIES insecticide kerosene kerosene emulsion larvae later leaf LEAF-BLIGHT leaves lice lime London purple magnified MILDEW mycelium nozzle orchard ounces Paris green particles of poison pass the winter peach pear pest plants PLUM CURCULIO potatoes pounds powder prevent Professor pump pupa pupate Pyrethrum Remedies-Spray remedy Riley San José scale season second brood slake soap soon spores spots spraying machine STRAWBERRY suck sulphur surface tobacco treatment trees twigs vines weeks worms young