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In this experiment, 6 biological pesticides and clear water were used as the control for a total of 7 treatments. The reduction rates of pest populations and corrected control efficacy were analyzed at 1, 3, 7, and 14 days after application. The results showed that 0.5% chelidonine and 0.3% aristolochic acid had the best persistence, with control efficacies reaching 69.21% and 50.84% respectively at 14 days after application; Bacillus thuringiensis (Bt) had significant rapid efficacy, with a control efficacy of 63.42% one day after application. The control efficacy of each pesticide decreased with the extension of application time. Considering the local climate characteristics of drought and little rainfall in Gansu Suzhou maize production area, it was recommended to alternately use chelidonine, aristolochic acid, and Bt to achieve green control of Helicoverpa armigera in this area.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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