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. Fig. 28.— Scab disease of horse bean. affected, and again the disease seems to become established or spread in certain spots in the field like a fusarinm wilt, which this trouble resem- bles in some respects. Considerable work has failed, however, to isolate any fungus from plants showing this disease, which is the commonest one attacking horse beans in California. No specific control for yellows can be suggested, but crop rotation is advisable for horse beans as a precaution against diseases and pests in general.
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Keywords: ., book, bookcentury1900, bookleafnumber48, booksubjectplantdiseases