The stem blight mainly occurred in the period of flowering and podging of sesame. High temperature and humidity are conducive to the invasion and expansion of germs. Especially after a sudden onset of heavy rain. Symptoms: After the onset of the roots, it gradually becomes brown and withered. The lesions on the stems showed yellow-brown water stains at the beginning, and there were no clear boundaries with healthy tissue. Then they developed into large spots and spread around the stems. The lesions were blackish-brown, central silvery-gray, shiny, dense black spots with dense needle tips. The leaves of the diseased plants were curled and wilting from the bottom up, dark brown, not falling off, and the tops of the plants bent and sagged. After the onset of pods, it was dark brown and dead. Control methods: spray 70% mancozeb WP 800 times, or 50% carbendazim 500 times, or 70% thiophanate-methyl WP 600 times at the beginning of the disease, spray once every 7 days , Even spray 2 to 3 times, and cure wilt.
The disease mainly damages the leaves, stems and pods. The peak incidence is from July to August, and the high-temperature and high-humidity conditions are expanding rapidly. Cooling after a heavy rain or cooling at night is beneficial to the disease. Symptoms: The appearance of brown water-stained irregular spots at the onset of leaf disease, dark brownish wet rot when the humidity is high, white moldy edges, yellow-brown spots when dry, and dark green water stains at the onset of stalks. Streaky spots, followed by dark brown irregular spots, slightly sag, surrounded by the whole stem after the contraction of the disease, the edge is not obvious, when the humidity is up and down, resulting in the whole plant withered; pods lesions were water stains like dark green, after Brownish sag. Control methods: Bordeaux spray 1∶1:100 at the early onset, or 58% metalaxyl WP WP 500 to 600 times, or 75% chlorothalonil wettable powder 600 times.
Bacterial wilt is mainly harmful to stems, leaves and pods. The peak incidence is from July to August, and high temperature and high humidity are beneficial to the onset of disease. In particular, the incidence of sudden onset after rain is heavier. Symptoms: dark green patches appear at the beginning of the culm, gradually dark brown spots, and 2 to 3 spindle-shaped ulcers at the tip. The top of the plant was wilting, and the lower part of the plant was wilting and showing water loss. The disease was still recoverable at night and died after a few days. There are also half of the plants first wilting and the other half temporarily maintain the original state. The vascular bundle of the rhizomes is brown and eventually spreads to the medullary cavity, resulting in hollows. When the humidity is high, bacteria liquid overflows both inside and outside the stem, and the bacterial liquid gradually changes into black particles. The leaves were infected and the veins were dark green and streaked, sometimes criss-crossing, forming a reticular pattern. The veins on the back of the leaves were yellow and the folds of the diseased leaves became brown and dead. The lesions of the pods were spotted with water-stained lesions, and the gradations were dark-brown spots with uneven thickness. Control methods: The diseased plants were found to be removed in a timely manner, and lime water was used to pour the disease points. In the early stage of the disease, 50% carbendazim WP was sprayed with 500-800 times solution.
Leaf spot damages leaves, pods, and stems, and leaves are the main victims. Rainy and humid conditions are conducive to disease. Symptoms: Leaves victim, lesions are round, nearly round or polygonal; edges dark brown, central grayish brown; lesions on the back of a layer of gray black moldy, lesions often rupture in the middle; serious, a blade on Can produce dozens of lesions. The lesions on the stem are light brown, irregularly shaped, and the edges are distinct. The lesions on the capsule are round and dark brown on the edges. Control methods: spray 75% chlorothalonil wettable powder 1000 times at the beginning of the disease, or Bordeaux mixture 1:1:1:50. Spray once every 7-10 days, even spray 2 or 3 times, and cure leaf blight.
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Short Transport Swab, Short Swab, Short Sampling Swab, Child use Swab,Pediatric​ Swab, Small Swab
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