Diseases and Insect Pests and Their Control
Edible Starch Mixer,Starch Mixer,Coupling Starch Mixer,Yam Starch Mixer Shuangfeng County Dingyuan Machinery Manufacturing Co. Ltd.. , http://www.starchseparator.com
1 The onset of the fruit, first in the green fruit on the irregular round brown micro-depression lesions, there are small black spots, arranged in a ring-shaped, and some orange-red mucin appeared on the lesions. In the later period, the disease turned black and died hard.
2 Leaf disease, early yellow dots, expanded to irregular lesions, red-brown edges, black spots on the late lesions, and some broken perforation. Severe onset of heat and humidity in July-August.
Control methods:
1 During pruning in winter, the cut off pests and branches together with the residual leaves were burned to eliminate the source of overwintering.
2 Spray 0.5 cm Baume of lime sulfur before flowering, spraying 80% of the special 1000 times liquid spray, spraying once every 7 to 10 days, and spraying 3 to 4 times.
3 Control of water and fertilizer in the summer, heavy pruning, giving up fruit and fruit; autumn to strengthen fertilizer and water management. 4 At the beginning of the disease, it was sprayed with 1 : 1: 120 Bordeaux mixture or 50% carbendazim 800 times.
2. Gray spot disease. Hazardous to the leaves, lesions on the diseased leaves appear to be round, grayish-white, and brown on the edges, and pale black poisonous substances appear on the back of the leaves.
Control methods:
1 Increase phosphorus and potassium fertilizers to increase disease resistance.
2 from the beginning of June spray 1:1.5:300 Bordeaux mixture or 65% mancozeb 500 times, spray every 7 to 10 days, and even spray 2 or 3 times.
3. Root rot. Hazardous roots, roots begin to turn brown and rot, spread to the main root black rot, severe skin rot decay, leaving only the xylem, and finally the whole plant withered.
Control methods:
1 The plants with yellow leaves, shrive branches, and dead branches were found and immediately removed. The diseased points were sterilized with 5% lime milk to prevent spread.
2 At the beginning of the disease, water the roots with 50% carbendazim 1000-1500 times.
4. Drain the worms, also known as golden worms, meat worms. Is a head, chest black, has a pair of yellow-brown coleoptera small beetles. Adults and larvae are all damaged leaves, resulting in numerous holes. In severe cases, the leaves are all eaten, leaving only veins.
Control methods:
1 Irrigation, ripping, or ploughing of tree trays in winter and spring can kill some of the overwhelming insects.
In mid-February, when the infestations were excavated, 5 kg of carbaryl powder, 1 kg of finely mixed soil, and 5 kg were applied to the ground, and 2 kg of medicine was applied per 667 square meters.
3 In the occurrence period, spraying with 40% omethoate EC 1000 times to prevent and control, 20 days before fruit collection is prohibited.
5. Other pests. For small earthworms, cockroaches, pod moths, rolling moths, fruit flies and other pests, 40% dimethoate 1000 times or 90% trichlorfon 800-1000 times spray control, or artificial killing.