Effects Of Peanut Cultivation Measures On The Leaf Pest And Control Measures

China is the large peanut production country in the world, Shandong is one of the main peanut producing areas. With the development of peanut cultivation techniques, the planting modes became diversification and peanuts species increased continuously. Combined with factors such as the change of climate conditions and planting habits all influenced the occurrence of peanuts pests. This paper studied the effect of planting modes on above-ground pests; the resistant differences of peanut species on Helicoverpa amigera and Tetranychus cinnabarinus, and studied the effect on Aphis craccivora with seed dressing, and provide basis and technical support for the pests control. The main results were as followed:1. The systematic investigation in field indicated that planting modes had a distinctive influence on dominant insect species and acute stage. The effects on occurrences of peanut above-ground pests caused by different planting modes, Aphis craccivora, Tetranychus cinnabarinus, second generation Helicoverpa amigera, Spodoptera exigua and Frankliniella intonsa were those who do harm to spring peanuts, and there were differences between early and late spring peanut field. Aphis craccivora and Tetranychus cinnabarinus, did harm to early peanut field seriously than later peanut field. The third generation Helicoverpa amigera, Spodoptera exigua and Frankliniella intonsa mainly appeared on the summer peanut field.2. It was significantly different that the resistant of peanut species on Helicoverpa amigera. The investigation showed that huayu24, 818 and gaoO/L were more resistance to pests in the selected 12 kinds of peanut, relatively, and in the acute stage of 2 generation Helicoverpa amigera, the number of insects and larvae plant rate was lower than other varieties, obviously; baisha1016. KB008. and fenghua6 were susceptible variety. Indoor test showed that Helicoverpa amigera laid less eggs on huayu24 and 818, the proportion were 3.6% and 3.2%, respectively, were significantly lower than other peanut varieties, and the eggs quantity rate up to 14.2% on susceptible variety of KB008; The effects of peanut species on duration of larvae and weight of Helicoverpa amigera were significant, that the larvae weight were 97.56 mg and 97.56 mg feed on huayu24 and 818, lower than the KB008 significantly, which weight were 215.17 mg and 217.72 mg feed on fenghua6 and KB008. The duration of larvae feed on huayu 24 and 818 were longer than fenghua6 and KB008.3. It was significantly different that the resistant of peanut species on Tetranychus cinnabarinus. The investigation indicated that fenghua5, KB008 and 606 were resistant variety, the damaged leaves rate were 7.2%, 8.1%, 8.0%, lower than the susceptible variety of huayu24, baisha1016 and fenghua6, which damaged leaves rate were 19.2%, 13.7% and 11.0%., other species were medium resistance. Indoor test results showed that fenghua6 and huayu24 were even trend selectivity in the 12 kinds of peanut, and it had not obvious resistance of fenghua5 and 606; The fenghua5, 606 and gaoO/L adverse to the growing development of Tetranychus cinnabarinus, and the population developed faster of Tetranychus cinnabarinus that feed on baisha1016 and huayu24, other peanut species had no significant difference involveed selectivity and growing development of Tetranychus cinnabarinus.4. Seed dressing of neonicotinoid insecticides had a good effect to control Aphis craccivora. Pot test results showed that the control effects of 20% clothianidin SC, 70% thiamethoxam ZF and 60% imidacloprid FS were above 99.1% 20 days later and all over 89% 50 days later when given the dose of 240g/100 kg. The results of field efficacy showed that the control effects of 20% clothianidin SC, 70% thiamethoxam ZF and 60% imidacloprid FS were all up to 100% 25 days later, and were 87.07%-92.67% 45 days later. Clothianidin had the best control effect to Aphis craccivora, while the control effect of chlorpyrifos was very poor. The neonicotinoid insecticides had excellent control effects to Aphis craccivora with seed dressing, and could control underground pests and protect the natural enemy effectively.