. Cirtus frutti sotto irragation. Agrumi; frutta-cultura. r^TT'OTTC V^X X XV V-' .J â POTTT"A X XV v^ X X WJ costantemente in lotta contro i parassiti che possono essere controllati. In California e Arizona la fumigazione degli alberi con idro- cyanic-gas acido contiene la maggior parte dei seri pesti di insetto nel controllare, ma nel golfo costa di membri la spruzzatura sembra essere il modo più pratico per la lotta contro di esse. Entrambi gli insetticidi e fungicidi sono necessari lavori di spruzzatura. Molti coltivatori di acquistare i materiali e mescolare i propri spray; altri proprietari di usare insetticidi e fungicidi. In aggiunta agli insetticidi e

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. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. r^TT'OTTC V^X X XV V-' .J â POTTT'TO X XV v^ X X WJ constantly fighting the pests that they can be controlled. In California and Arizona fumigation of the trees with hydro- cyanic-acid gas holds most of the serious insect pests in check, but in the gulf-coast states spraying seems to be the most practical way of combating them. Both insecticides and fungicides are necessary in spraying work. Many growers buy the materials and mix their own sprays; others use proprietary insecticides and fungicides. In addition to insecticides and fungicides, certain parasitic fungi, usually known as friendly fungi, are sometimes sprayed on the trees. These fungi, of which there are several kinds, help to control many injurious insects. More specific infor- mation regarding them is given in a later Section. All spraying, to be effective, must be done thoroughly. Several sprayings are likely to be required each year, and a grower cannot afford to neglect any of them. The trees should be accessible from all sides, and the workmen should be cau- tioned to get the material on all parts of the tree. For small groves, hand pumps mounted on a barrel are satisfactory, but growers with large acreages find the power sprayers more satisfactory. The gasoline-engine type of j^ower sprayer is the most popular. Carbonic-acid gas and compressed-air power sprayers are also recommended by many growers. Most any kind of equipment desired can be purchased, and a person just starting into the business of growing citrus fruit will have no trouble in getting a desirable outfit. IRRIGATION OF GROVES 43. Growers consider irrigation a means of insuring the citrus crop. When the supply of water is inadequate, the trees do not produce good crops, and what fruit is produced is not of good quality. Often there will be several years when the rainfall is so distributed that practically no irrigation is necessary. Then may come a year in which there i

Parole chiave associate all'immagine

• bookcentury1900
• booksubjectcitrusfruits
• booksubjectfruitcultur