A: The early defoliation of kiwifruit is caused by brown spot disease. The disease mainly damages young leaves and also harms the tender shoots. The disease has obvious symptoms in the leaf in July-August. The white spots on the tender leaves begin to appear, and then turn into brown dots. The shapes are triangular, diamond, polygonal, and radial. With the expansion of the lesions, each shape is mixed into large spots, and some inconspicuous molds appear on the back of the leaves. point. In the case of high-temperature and high humidity lesions expanding faster, causing the lesions from brown to dry, damaged leaves in the coil or broken, leading to early fall off.
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