A Manual for Citrus Growers1947 - 141 páginas |
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Página 52
... mealybug by the Cryptolaemus ladybird and the later introduced parasites , Coccophagus gurneyi and Tetracnemus pretiosa ; and the control of black scale by Metaphycus helvolus . Cottony cushion scale was so serious a menace to the ...
... mealybug by the Cryptolaemus ladybird and the later introduced parasites , Coccophagus gurneyi and Tetracnemus pretiosa ; and the control of black scale by Metaphycus helvolus . Cottony cushion scale was so serious a menace to the ...
Página 131
... mealybug Pseudococcus gahani ( green ) -citrophilus mealybug Psorosis - scaly bark Saissetia oleae - black scale Schizophyllum commune trunk rot Scirtothrips citri ( Moulton ) -orange thrips . Sclerotinia sclerotiorum - cottony mold ...
... mealybug Pseudococcus gahani ( green ) -citrophilus mealybug Psorosis - scaly bark Saissetia oleae - black scale Schizophyllum commune trunk rot Scirtothrips citri ( Moulton ) -orange thrips . Sclerotinia sclerotiorum - cottony mold ...
Página 137
... Mealybug , citrophilus 52 Pectin 119 Mealybug , long - tailed 53 Mealy bugs Persing , C. O. , on snail 51 control 110 Measuring water 22 Pest control 39 Melilotus alba .101 Pest control , biological 52 Melilotus indica .101 Metallic ...
... Mealybug , citrophilus 52 Pectin 119 Mealybug , long - tailed 53 Mealy bugs Persing , C. O. , on snail 51 control 110 Measuring water 22 Pest control 39 Melilotus alba .101 Pest control , biological 52 Melilotus indica .101 Metallic ...
Índice
Chapter Page 1 SOILS CLIMATE WATER | 2 |
CITRUS TREES | 4 |
IRRIGATION PRACTICES | 11 |
Direitos de autor | |
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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