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Control Recommendations for the Overwintering Generation of the Box Tree Pyralid Moth

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The box tree pyralid moth (Glyphodes perspectalis) is one of the important leaf-eating pests of forestry plants in this district, mainly damaging Chinese box (Buxus sinica var. parvifolia) and Japanese box (Buxus bodinieri). Since early spring this year, the whole district has carried out 2-3 rounds of comprehensive control against this pest, effectively bringing the damage under control; however, since the damage period of this pest is long and can last until the end of October, continued follow-up monitoring of this pest is still needed. According to monitoring at two sites, the Anting Ginkgo Garden and the Fangtai Flowers and Plants Horticultural Farm, a moth peak appeared under the forecasting lamp in early to mid-September, with the highest moth numbers on September 7-9, averaging 22.3 moths per lamp per day

The box tree pyralid moth (Glyphodes perspectalis) is one of the important leaf-eating pests of forestry plants in this district, mainly damaging Chinese box (Buxus sinica var. parvifolia) and Japanese box (Buxus bodinieri). Since early spring this year, the whole district has carried out 2-3 rounds of comprehensive control against this pest, effectively bringing the damage under control; however, since the damage period of this pest is long and can last until the end of October, continued follow-up monitoring of this pest is still needed. According to monitoring at two sites, the Anting Ginkgo Garden and the Fangtai Flowers and Plants Horticultural Farm, a moth peak appeared under the forecasting lamp in early to mid-September, with the highest moth numbers on September 7-9, averaging 22.3 moths per lamp per day; at present, all developmental stages and instars coexist in the field, with older larvae predominating; early to mid-October is expected to be the peak damage period of young larvae, and larvae will successively enter the overwintering stage as 1st-2nd instar larvae. Therefore, all units are requested to organize one round of control to reduce the overwintering population and ease the pressure of control next year.

Control method: In early to mid-October, choose 20% diflubenzuron suspension concentrate at 3000-4000 times dilution, or 25% chlorbenzuron III suspension concentrate at 2000 times dilution, or 1.2% bitter nicotine emulsifiable concentrate at 1500 times dilution and other pesticides, mix with water and spray evenly.

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