Kiwifruit scientific name Actinidia chinensis Pianch. Alias ​​carambola, white peach, hair pear, rattan. It belongs to the genus Peach and rattan shrub. Take root and fruit medicine. With tune in Qi, Sheng Jin Runzao, antipyretic Chufan, blood swelling effect. Shaanxi, Zhejiang, Jiangxi, Fujian, Henan, Hubei, Hunan, Guangxi, Guangdong, Sichuan, Guizhou, and Yunnan have all been cultivated.
Symptoms mainly damage the leaves and occur from July to August. The twigs on the leaves were born with a tan-colored tinge, which later expanded into blemishes. The edges were brown, and the middle was gray-brown with a pronounced ring pattern. The disease department has black spots, which are the conidia discs of pathogenic bacteria.
Pathogen Pestalotiopsis sp. A genus of the genus Durum, a fungus belonging to the genus Deuteromycotina. Conidia discs were 172-120 μm in size, with conidiophores and terminal conidia. Conidia fusiformis, 5 cells, conical at both ends of the cell, colorless, the middle 3 cells larger, brown, size 19-237-9 (μm), the top 2-3 bristles.
Transmission routes and pathogenic conditions The pathogens overwinter on leaves and other diseased bodies, and the high-temperature and rainy seasons in June and August of the following year have entered the onset of the disease. There are differences in disease resistance among varieties.
Control methods (1) Selection of disease-resistant varieties in severe wards. (2) Carefully clear the park in autumn and winter, and focus on burning down the diseased body to reduce the source of overwintering bacteria. (3) In the early stage of onset, spray 25% Benzosterpure EC 700 times or 50% Methotrexate Wettable Powder 900-1 000 times, 12% Green Milk Emulsion 600 times, 1:1:200 times Bordeaux liquid.
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