Anthrax is a major disease in Milan and can infect the leaves, petioles, shoots, and stems of Milan. The pathogenic bacteria was Ascomycoides subcolumnella, and the asexual stage of the Aspergillus niger. Shading is aggravated by poor ventilation.
First, symptom recognition
At the early stage of leaf damage, the tip of the leaf becomes brown and spreads into the leaf, reaching one-third to one-half of the foliar surface, and the edge of the lesion is obvious; when the petiole is injured, the diseased part becomes brown and spreads to the leaf and spreads to the main vein, The branch veins and even the entire leaf become brown, the lesions spread downwards, from the petiole to the total petiole, branchlets, and even the stems turn brown and die. During the onset of disease, the leaves and twigs continued to fall off until the leaves of the whole plant fell off and the branches dried up and died.
Second, prevention and control technology
1. Diseased leaves or diseased petioles should be immediately cut off and destroyed, while diseased leaves and dead plants should be removed.
2, strengthen management, increase potash fertilizer; enhance plant resistance.
3, to strengthen the thinning, ventilation and light, can reduce the incidence.
4, before and after the onset of spraying 1:1: 100 Bordeaux mixture; or potassium manganate 1200 times; or 70% thiophanate-methyl powder 800 to 1000 times; or 75% chlorothalonil WP 500 to 800 times liquid Prevention.
5, Milan transplanted in different places, asked the seedlings to earth ball bigger, as little as possible damage the roots, it is best bag seedlings; in the transportation process, requires a good ventilation, shipments of bamboo baskets as well, set up isolation between the seedlings.
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