The researchers pointed out that in the production of peanuts, the amount of seed dressing should not be increased arbitrarily, and the influence of soil temperature and humidity should be noted.
5 kinds of pesticide dressings have different safety to peanuts under different soil temperature and humidity
In order to evaluate 60% imidacloprid suspension seed coating agent, 70% thiamethoxam seed treated dispersible powder, 20% clothianidin suspension, 30% phoxim microcapsule suspension, 30% chlorpyrifos microcapsule suspension agent and other five agents For the safety of peanut seed dressing affected by soil temperature and humidity, researchers from the College of Plant Protection of Shandong Agricultural University used the small cup method to determine the effects of five kinds of pesticide dressing on peanut emergence and seedling growth under different soil temperature and humidity conditions. difference.
The results showed that at 25 °C and 30 °C, the recommended safety doses of imidacloprid, clothianidin, thiamethoxam and chlorpyrifos were higher in peanuts at 60% and 80% soil relative humidity, and the emergence rate was higher. More than 85%, and neonicotinoids imidacloprid, clothianidin and thiamethoxam have obvious promoting effects on the growth of peanut underground rhizome, while the recommended dose of seed dressing in phoxim field has a slight inhibitory effect on peanut emergence.
When 5 kinds of pesticides were seeded with double recommended doses, except for imidacloprid and clothianidin at 25 °C and 30 °C, the other three agents inhibited peanut emergence and growth at different relative humidity of 60% soil. The inhibitory effect of thiamethoxam was the most obvious; under the relative humidity of 80% soil, all the five agents significantly inhibited the emergence of peanut and seedling growth.
The researchers pointed out that in the production of peanuts, the amount of seed dressing should not be increased arbitrarily, and the influence of soil temperature and humidity should be noted.
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