According to the current comprehensive analysis of the incidence base, the growth of mulberry trees, the management of mulberry fields, and the weather forecast, it is expected that the major diseases and pests of mulberry trees will be moderate to heavy in the fall of this year. Among them, mulberry diseases occur in the middle of rivers and coasts, with partial occurrence; four generations of mulberry occur moderately to overweight and occur in large numbers; five generations of mulberry tend to occur in large numbers and occur in large numbers; three generations of mulberry middle weight occur in the middle, local occurrence The mulberry mosquitoes in the Huainan region occurred moderately and occurred moderately in the Huaibei region. The mulberry horses developed moderately in the Huaibei region, with partial occurrence. The other regions appeared lighter, with moderate incidence.
The forecast is based on the occurrence of pests (1) plague. At present, the field disease rate and incidence area are similar to the same period last year. (2) Mulberry. According to Wujiang, Qidong, Hai'an, Rugao, Dongtai, Rudong, and Sheyang in the survey of three generations of mulberry larvae during the peak period, the amount of worms per mu was 1,200 to 4,100. Qidong and Hai'an were only held at the same level as last year. Other regions were higher than the same period of last year. (1000 to 2000 heads per mu). (3) Mulberry feet. The second generation of insects was higher than the previous year. (4) Mosquito mulberry mosquitoes. The early control effect is good, and the amount of field debris is low. (5) Mulberry horse. Most areas were affected by long-term rains, continuous rains in late July, and thunderstorms in early August, and there were fewer insects.
There are some abandoned mulberry fields because of the high risk of sericulture, and some mulberry gardens are abandoned and abandoned, which will increase the number of field pests.
The overall weather conditions are more favorable. According to the forecast of the provincial meteorological observatory, in August, the temperature in the whole province was slightly higher and the precipitation was slightly more normal, mainly due to process precipitation. Weather conditions are conducive to the occurrence of mulberry, mulberry and mulberry mosquitoes. In addition, typhoon activity is more active and affected by the intensity of precipitation in some areas, which will increase the epidemic of mulberry disease.
The prevention and control opinions on production should capture the favorable opportunity before the start of the autumn silkworm species and carry out appropriate prevention and control for different control objects. According to the timing of the silkworm rearing and the residue period of the pesticide, the pesticide varieties were selected. Silkworm silkworm field application strictly prohibits the use of avermectin, imidacloprid, chlorantraniliprole, pyrethroids, nereis, diamides, bacteria containing Bacillus thuringiensis, nuclear polyhedrosis virus Viral drugs and their compounding agents, as well as other insecticides that indicate silkworm-sensitive pesticides, ensure the safety of silkworms.
To control Lepidoptera pests and mulberry Mosquitoes such as mulberry, mulberry, etc., dichlorvos, phoxim and other drugs may be used. Prevention of mulberry horses, the commonly used drug is acetylene. For prevention and control of mulberry diseases, oxytetracycline hydrochloride, streptomycin sulfate, and enrofloxacin hydrochloride can be used. Pay attention to the use of special medicines for mulberry fields. Pharmacies registered on other crops must not be used at mulberry fields.
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