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This study investigated the impact of different netting methods on the cowpea (Vigna unguiculata) industry. Specifically, it compared the degradation characteristics of three pesticides-matrine, spinosad, and difenoconazole-under two netting conditions (fully enclosed and semi-enclosed), the accumulation changes of pectin, cellulose, total phenols, and flavonoids, and analyzed the economic benefits of cowpea cultivation under the netting methods. The results indicated that under semi-enclosed netting conditions, the half-life of the pesticides was 1.13 days for matrine, 0.42 days for spinosad, and 1.96 days for difenoconazole. In contrast, under fully enclosed netting conditions, the half-life of the pesticides was 1.53 days, 0.83 days, and 2.51 days, respectively. Compared to fully enclosed netting, the degradation rate of the pesticides was significantly faster under semi-enclosed netting conditions. Regarding the accumulation of key substances, there was no significant difference in the contents of pectin [(15.88±2.025)mg/g] and cellulose [(1.75±0.128)mg/g] between semi-enclosed and fully enclosed conditions. However, total phenol content under semi-enclosed netting [(0.42±0.125)mg/g was 40.00% lower than that under fully enclosed netting [(0.70±0.091)mg/g], and flavonoid content [(6.08±2.509)mg/g] was 55.91% lower under semi-enclosed netting than under fully enclosed netting [(13.79±0.876)mg/g]. Economic analysis showed that considering field management, pest control investment, and market conditions, cowpea cultivation under fully enclosed netting yielded higher input and output compared to semi-enclosed netting. When the purchase price of cowpea reaches 5.11 yuan/kg (for fully enclosed netting) and 3.85 yuan/kg (for semi-enclosed netting), the profit and loss break even. This study would provide both theoretical and practical guidance for selecting appropriate netting methods for cowpea cultivation.
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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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