. Better fruit. Fruit-culture. Natural Gall in Young Apple Tref Tluil Has Hpi'ome Infected at Place Where Tree Was Bench flrafted. fall often will not develop until active yrowth in the following spring. May not this retarded development of the disease account for the large amount of gall that sometimes develops on young orchard trees from stock that was care- fully inspected and appeared to be per- fectly free from crown gall? Crown gall infection must start from soil containing the disease-producing organism. There can be little doubt I hat the soils of California are often naturally infecte
. Better fruit. Fruit-culture. Natural Gall in Young Apple Tref Tluil Has Hpi'ome Infected at Place Where Tree Was Bench flrafted. fall often will not develop until active yrowth in the following spring. May not this retarded development of the disease account for the large amount of gall that sometimes develops on young orchard trees from stock that was care- fully inspected and appeared to be per- fectly free from crown gall? Crown gall infection must start from soil containing the disease-producing organism. There can be little doubt I hat the soils of California are often naturally infected with crown gall, â fhis is especially true of those that were formerly wooded or have pre- vioiish grown stone fruits, especially if the trees grew on peach roots. is actually known as to how actively Ihe disease spreads under nursery irri- gation. The fact that where irrigation is practiced crown gall appears more prevalent would suggest that the dis- ease is possibly spread in this Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Washington State Apple Commission. Hood River, Ore. , Better Fruit Pub. Co
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