A Manual for Citrus Growers1947 - 141 páginas |
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Página 43
... RED SCALE is the most serious of citrus pests . It is a small , red- ish scale insect with a waxy coating which tends to protect it from insecticides . Red scale is difficult to control because it has three or more over - lapping broods ...
... RED SCALE is the most serious of citrus pests . It is a small , red- ish scale insect with a waxy coating which tends to protect it from insecticides . Red scale is difficult to control because it has three or more over - lapping broods ...
Página 44
... red scale , it has but one major brood in the summer . But in the coast- al regions there are definitely two broods ; frequently off season hatches oc- cur in intermediate areas . These irregu lar broods make control difficult , because ...
... red scale , it has but one major brood in the summer . But in the coast- al regions there are definitely two broods ; frequently off season hatches oc- cur in intermediate areas . These irregu lar broods make control difficult , because ...
Página 53
... red scale . This insect has become established but it has not yet proved effective as a control . Further explorations for parasites of red scale are in prospect . Black scale now is controlled successfully in coastal areas by the ...
... red scale . This insect has become established but it has not yet proved effective as a control . Further explorations for parasites of red scale are in prospect . Black scale now is controlled successfully in coastal areas by the ...
Índice
Chapter Page 1 SOILS CLIMATE WATER | 2 |
CITRUS TREES | 4 |
IRRIGATION PRACTICES | 11 |
Direitos de autor | |
18 outras secções não apresentadas
Palavras e frases frequentes
100 gallons acid alkaline ammonia amount applied areas black scale boxes per acre brown rot carbon cause chemical chlorosis Citrus Diseases Citrus Experiment Station citrus fruits citrus growers Citrus Leaves citrus trees copper COST PER ACRE County cover-crops crop cultivation Cultural Cost damage dust effective fertilizer field boxes foliage fumigation fungus furrows grapefruit grove growth heavy inches injury insects irrigation irrigation water juice leaf lemons lime manganese deficiency manures material mealybug method mixture moisture Mutual Orange Distributors navel navel oranges nitrate nitrogen oil spray orchard organic matter packed boxes parasites percent pest control phosphate phosphorus plow-sole potash pounds production profitable pruning red scale red spider rind root zone rootstock Rough lemon scaly bark Septoria soil sucker sulphate sulphur symptoms temperature thrips treatment trifoliate orange trunk usually Valencia orange virus weeds windbreak wood young trees zinc deficiency zinc oxide zinc sulfate