. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. 8 riTPTTQ PPTTTTQ S on §29 TAT /^TTT T^ /^^/~\ A r~\rT\ r^ rr> * .^^ 9 the fungus causing scab. Such growth can be pruned out and destroyed, which will help to prevent a recurrence of the disease. All sour orange or worthless lemon trees in a grapefruit grove should be cut out or budded over, as they are almost always affected with scab and spread the disease to the grapefruit trees or to other varieties of citrus that are susceptible to it. All scabbed sour oranges or lemons should be picked up and destroyed. In very mo
. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. 8 riTPTTQ PPTTTTQ S on §29 TAT /^TTT T^ /^^/~\ A r~\rT\ r^ rr> * .^^ 9 the fungus causing scab. Such growth can be pruned out and destroyed, which will help to prevent a recurrence of the disease. All sour orange or worthless lemon trees in a grapefruit grove should be cut out or budded over, as they are almost always affected with scab and spread the disease to the grapefruit trees or to other varieties of citrus that are susceptible to it. All scabbed sour oranges or lemons should be picked up and destroyed. In very moist situations where scab is severe from yQ3X to year the fruit may be protected by spraying with any of the commonly used fungicides, as lime-sulphur solution, ammo- niacal copper carbonate, or Bordeaux mixture. The lime-sul- phur is usually preferred, vsince it is also of considerable value in killing scale insects and mites. The first spray should be applied soon after the petals fall and a second application should be made from 2 to 4 weeks later; a third spraying will not often be neces- sary. The tissue as it becomes older be- comes entirely im- mune to further at- tack of the fungus. In moister sections where jmrasitic" fungi are present and are efficient agents in controlling scale insects and the white flics, the use of fungicides is often followed by a rapid increase of these insects, due to the killing of the parasitic fungi. 9. Melanose.—A disease of fungus origin known as melanose is frequently found on the fruit, leaves, and young stems of all varieties of citrus trees in Florida. It is perhaps most noticeable on the grapefruit because of the smoothness of the skin of the normal grapefruit. The disease was first noticed in Florida in 1892. It has since been reported in Australia, Porto Rico, and Algeria. It is not known to occur in Fig. 5 Melanose manifests itself as a superficial marking on the surface of the fruits, leaves, and stems. Fig. 5
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Keywords: ., bookcentury1900, booksubjectcitrusfruits, booksubjectfruitcultur
