Mulberry Disease and Pest Control

First, the main diseases of mulberry and its prevention
(1) Brown spot: It is a fungal disease. The leaves are full of lesions, brownish, withering and rot. The pathogens were overwintering on the diseased leaf with the semi-known fungus Aspergillus sporangia. The new conidia were produced the following year and infected with wind and rain insects. Control methods: a, with 50% carbendazim 1000-1500 times or 70% thiophanate-methyl powder 1500 times liquid phase separated 10-15 days spray control; b, winter leaves all get rid of, burn buried; c, With Baume 4-5 degrees lime sulfur coated dry; d, 0.7% Bordeaux mixture is also OK.
(2) Mulberry Powdery Mildew: On the back of the old leaves in the lower part of the shoots, small white mildew spots are scattered on the back, and the continuum is gradually enlarged until it is covered with whole leaves. The surface of the mildew spots is powdery. In the corresponding front of the Mulberry white spot, a yellow-brown chlorotic spot appeared. High temperature and humidity environment are popular. The prevention and control method is to eliminate the pathogens of overwintering with Baume 4-5 degree stone flow mixture, and use 2% potassium sulphate or 5% polysulphide sulphate liquid; use 70% thiophanate-methyl 1000-1500 times every 10-15 times. Days can be sprayed twice.
Second, mulberry pests and their prevention and control (1) Mulberry worms: Adults eat staples, affect the growth of trees, postpone mulberry germination period, reduce the clockwork. One generation occurred in a year. Adults lived in winter in the axillary holes of the stubble piles. In the first month of April, acupuncture activities took place and there were nutritional feeding stages. Generations were on the trees and would not fly. Control methods: a, winter pruning, cut off the semi-dry branches; b, 50% of the killing pine oil 1000 times spray.
(2) Sang Tianniu: The larvae gnaw on the branches and stems. When the damage is severe, the entire mulberry tree will die, adults will eat the mulberry cortex, and the branches will be easy to wind-break or even die. Generally, the generation will occur in two years. The adult larvae emerged as adults and emerged from the branches of the larvae. The larvae invaded the xylem at the base of the annual branches after oviposition. Control methods: During the larval movement, use 50% of the killing pine-emulsifiable oil 1000 times of spray, or 10% of the insect-emulsion 5000 times of the injected worm to kill.
(3) Sang worms: larvae in the early spring and after the cutting, the fruit damage mulberry sprouts, mulberry tree growth season food damage mulberry leaves, affecting tree growth and mulberry leaf yield, larvae in mulberry fissures or sporax silk pods overwintering. Young larvae are clustered and harmed after the third instar. Control methods: Use 80% dichlorvos EC 2000 times.
(4) Small tiger: Also known as silkworm. The juvenile larvae suffered from mulberry buds, which caused translucent leukoplakia or small holes in the leaves. After the third instar, they cut off the tender stems and caused mulberry saplings to be cut off. Pests have migrated, suspended animations, nocturnal, and have a strong phototaxis for black light. Prevention methods: a, spring plow soil can eliminate eggs and larvae; b, using Leko cream 1500 times or 80% DDV EC 2000 times spray.
(5) Starscream: larvae, raccoon, and early spring. The larvae of the mulberry leaves are sucked on the back of the leaves in the early spring. Many of the mulberry leaves are damaged along the leaf veins. Many spots appear outside the victim, and the veins are collapsed and become deformed. Yellow-brown, hardened sclerosis. It looks like a fiery burning and soon falls off, causing the mulberry to "cap". Affect the yield and quality of mulberry leaves. Control methods: During the period of sericulture, use the gap time to treat pests. a. When there are 2-3 red spiders per leaf, mix 40% Dimethoate 800-1000 times (residue period 13 days) or urea 1000 times (residue period 10 days) into the mixture; b, 20 % of dicofol 3000-5000 times to prevent and control 1-2 times; c, spraying cold water during the breeding season of red spider can reduce the damage.

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