The major pests and diseases of the major five-star cockroach are anthracnose, leaf spot, leaf spot, leaf ring disease, and stem rot disease. The main pests are poisonous moths, pear borer, and mulberry. Prevention and control adhere to the principle of prevention, comprehensive prevention and control of plant protection principles: First, the installation of frequency-type insecticidal lamp to trap and kill pests, generally every 4hm2 installation of a frequency vibration type insecticidal lamp; second is the application of fruit bagging technology; third is efficient , low-toxic, low-residue biological and chemical pesticides for prevention and control, strict control of the amount of pesticides and safety intervals, stop using drugs before harvest. Specific pest control measures for each pest are as follows:
1, leaf spot
Select disease-resistant varieties, increase tree vigor, improve air and light conditions of plants and orchards, do winter and summer clearing and disinfecting work, and burn and destroy sick leaves; when each new shoot grows to half its length, spray protection leaves and spray Two times, 10-15 days apart. The following agents can be used alternately: 70% thiophanate-methyl wettable powder 800-1000 times or 75% chlorothalonil wettable powder 600-800 times.
2. Anthrax
Strengthen the drainage of orchards and increase potash fertilizer; cut off diseased leaves, remove the diseased seedlings and concentrate or burn them. One month before fruit coloring, spray 1-2 times. The available agents are: 70% methylbutromycin WP 800-1000 times, or 50% carbendazim WP 500-600 times.
3, leaf spot disease
In early spring, timely removal of diseased plants, diseased leaves and burning, and doing summer clear garden work. Spray control before and at the beginning of the disease. The agents that can be used are: 80% mancozeb WP 600 times, or 70% WP 800 times.
4, ringworm disease
Clear the garden work, cut off the diseased leaves, dry branches and burn them in a concentrated manner. In the summer and autumn shoots, spray the protection during the leaf stage and spray once every 7-10 days for 2-3 consecutive times. The available agents are 20% deconcentration oil 2000 times or 80% mancozeb wettable powder 800 times.
5. Branch rot disease
Use 75% chlorothalonil wettable powder 500-600 times or 50% thiophanate-methyl wettable powder 800 times spray control.
6, poison moths
Clean the garden in winter, deepen the garden soil, scrape, brush bark and white. Manual hunting or black light trapping. During each new shoot period, the larvae were sprayed 2-3 times at an initial period of 5-7 days. Use 80% dichlorvos EC 800-1000 times, cypermethrin EC 1000-1500 times or 16% worms 250-300 times spray.
7. Pears
Avoid peach and pear mixed planting and fruit bagging protection. Cut off the stabbing, stop in the fruit, scrape the old skin, and concentrate burned. You can use sugar, wine, vinegar, water ratio of 1:1:4:16 liqueur or black light trap. Control spraying at the hatching stage of the larvae at 5-7 days after the peak of adults. The optional agents are: 90% trichlorfon 800-1000 times or 20% cypermethrin 3000-4000 times.
8. Caterpillars
Do a good job in summer and winter, clear the garden, scrape and brush the white trunk; kill it manually or kill it with a black light lamp; release the natural enemies of parasitoids targetedly; when large numbers of larvae occur, use 90% trichlorfon 8000-1000 times solution. 80% of dichlorvos EC 800-1000 times or 20% cypermethrin 3000-4000 times.
9, Sang Tianniu
After harvesting fruit every year, the diseased branches are cut and destroyed, and the garden is completely cleared; adults are killed in spring and summer; the trunks are inspected from June to September, and young larvae under the skin and bark are scraped with a knife; the larvae are ironed along the active period. Assassination larvae; larvae in the deeper injection of 80% dichlorvos or 40% dimethoate 400 times the syringe, and then closed the wormhole with clay, so that larvae poisoning death.
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