The pharmaceutical agents currently registered for the control of mulberry are: 40% of Gotemba EC and 60% of Maju EC of Zhejiang Anji Banghua Chemical Co., Ltd. (telephone, 88765699), and 65 of Taizhou Dapeng Pharmaceutical Co., Ltd. (telephone). % chlorpyrifos EC.
According to relevant data, Methomyl is used in mulberry fields, and the residue period is 5-7 days. After 7 days of field spraying, feeding silkworm leaves has no significant effect on silkworms. Dichlorvos have a short duration of validity, and they can generally be fed with silkworms for 7-14 days after application. Spraying 50% of malathion EC on the mulberry tree 1000 times. After 7 days, the 5th instar silkworm had no adverse effects. In the mulberry field, 40% chlorpyrifos EC is applied for 2000 times, and the safe interval for feeding silkworms from the mulberry leaves is 12-15 days.
Tip: Even if silkworms are collected after the residue period, they should be tested first to confirm that there are no toxic effects before they are fed to silkworms. Where conditions permit, the farmland shall be planned and used in a unified way so that the mulberry field will be contiguous and separated from other crops, so as to avoid contamination of the mulberry leaves by farmland medication. In addition, some chlorpyrifos, dichlorvos and other products not registered in the mulberry field, the manufacturer will add some recessive ingredients to the pharmaceuticals to enhance the control effect. These ingredients may be highly toxic to silkworms, so it is advisable to use the medicine registered for mulberry trees. .
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