. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. 32 OliKU^ TKUlih UlNiJl^K IKKlLrAllUlN §25 8ZO /~\Trr\T^ TT/-A â T-rrr\r\ t t â¢Â» t t-^ t-% â ?-» -r-t-» t-»-r <"« 4 »-»^-r<-N'*' \^lli\UD ^ UlMJU/i^ ii^i^lLj/VliUlN 66 and usually appear at the side of the tree, or encircling it. At times, however, they come up at a distance from the tree where a root comes near the surface of the ground. The toadstools produce spores which are often so abundant that they cover the ground as a white powder. In addition to the toadstools, felty white growths spread out f
. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. 32 OliKU^ TKUlih UlNiJl^K IKKlLrAllUlN §25 8ZO /~\Trr\T^ TT/-A â T-rrr\r\ t t â¢Â» t t-^ t-% â ?-» -r-t-» t-»-r <"« 4 »-»^-r<-N'*' \^lli\UD ^ UlMJU/i^ ii^i^lLj/VliUlN 66 and usually appear at the side of the tree, or encircling it. At times, however, they come up at a distance from the tree where a root comes near the surface of the ground. The toadstools produce spores which are often so abundant that they cover the ground as a white powder. In addition to the toadstools, felty white growths spread out fanlike within the bark of affected trees. These growths crowd into the healthy bark, which puffs up, becomes moist, and often gummy. A white rot of the wood soon follows; this is accompanied by a clean mushroom odor. The fungus spreads from one place to another by black, cord-like strands about j^ inch in diameter. These are known scientifically as rhizomorphs. Occasionally they fork, but they do not branch like roots. These strands attain enormous length. They may course upwards and downwards in the affected tree, generally under the bark or merely in close contact with the outer surface. They also grow through the soil to con- siderable distance and thus serve to spread the disease from one tree to another. From a small infected area in a grove the disease may spread for several years until quite a large area is affected. Frequently several affected areas in a grove overlap, and if growth is allowed to continue, the entire grove may be affected. 39. Control measures in an affected area consist in blasting out old roots and burning them and then planting some annual crop. After a period of years trees may again be planted, but there will usually be danger of the fungus being in the soil and affecting the new trees. The margin of an affected area should receive treatment to prevent the spread of the disease. A plan suggested by Professor Home is to uproot a
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Keywords: ., bookcentury1900, booksubjectcitrusfruits, booksubjectfruitcultur
