A Manual for Citrus Growers1947 - 141 páginas |
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Página 10
... dust as often as necessary to keep the tree free of this pest . When red spider begins to show , use one of the following : DN dust ; one and one - half percent light medium oil spray ; selocide ; or sulphur dust ( this should be used ...
... dust as often as necessary to keep the tree free of this pest . When red spider begins to show , use one of the following : DN dust ; one and one - half percent light medium oil spray ; selocide ; or sulphur dust ( this should be used ...
Página 49
... Dust treatment : On oranges in Central California fairly good con trol is obtained by a three - dust program . The first application of one pound of sulphur dust per tree is applied about the middle of March when the first thrips appear ...
... Dust treatment : On oranges in Central California fairly good con trol is obtained by a three - dust program . The first application of one pound of sulphur dust per tree is applied about the middle of March when the first thrips appear ...
Página 51
... dust or spray of nicotine sulphate in the propor tions of 3/4 of a pint to a pint to 100 gallons of water with a spread- er . Rotenone sprays have been universally successful . ORANGE WORMS - Tortrix and holcocera worms eat holes in- to ...
... dust or spray of nicotine sulphate in the propor tions of 3/4 of a pint to a pint to 100 gallons of water with a spread- er . Rotenone sprays have been universally successful . ORANGE WORMS - Tortrix and holcocera worms eat holes in- to ...
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