The pathogenic fungus was a fungus belonging to the genus Aspergillus spp., which was overwintering on the host plant disease. More invasive from the wound and vulnerable plant leaves, leaf margins. High temperature and humidity, conducive to disease.
1. Symptoms of damage
1.1 The disease occurs in the leaves, mostly from the tip of the blade, the edge of the disease began, the lesion is brown green macular at the beginning, after expansion is often connected into a piece, irregular, yellow-brown or gray-brown lesions.
1.2 Late disease leaves dry and appear black granular material, namely conidia.
2. Control technology
2.1 Selection of healthy and disease-free bulbs.
2.2 After the end of summer, use 1:1:200 equal amount Bordeaux mixture; or 2% ferrous sulfate wettable powder 1000 times, or 50% TB wettable powder 1000 times spray, every 7 to 10 Sprayed once a day for 2 or 3 consecutive times.
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