Prevention and control method for tobacco aphids
A technology for tobacco aphids and aphids, which is applied in the field of tobacco aphid prevention and control, can solve the problems of single control method for tobacco aphids and cannot effectively control the occurrence and spread of tobacco aphids, and achieves good effects, good economic benefits, and reduced morbidity. Effect
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Embodiment 1
[0048] A control method for tobacco aphids, comprising the following steps:
[0049] 1. Agricultural prevention and control:
[0050] (1) Rationally apply nitrogen fertilizer, appropriately increase potassium fertilizer, and avoid excessive growth of tobacco plants. Fertilization is specifically: 2-2.5kg of pure nitrogen fertilizer per mu for high-fertilization fields, and the weight ratio of N, P, and K is 1:3.5:4; Apply 3-3.5 kg of pure nitrogen fertilizer per mu in the fertile field, and the weight ratio of N, P, and K is 1:2.5:3. High-fertility fields refer to available nitrogen fertilizer content of 81-100mg / kg, and available nitrogen fertilizer refers to quick-acting nitrogen content of 60-80mg / kg.
[0051] (2) Timely topping and wiping can be done,
[0052](3) Capping and pruning branches in good time, chemical bud suppression, described chemical bud suppression adopts 36% Zhongbuling emulsifiable oil, diluted 80-100 times, cup spraying method application,
[0053] (...
Embodiment 2
[0071] Basically the same as in Example 1, the dosage of Woyiduo per mu is 150ml of HYT-A, 300ml of HYT-B and 100g of HYT-C.
[0072] Compared with the control method of the comparative example, the incidence of aphids in the tobacco field using the control method of this embodiment is reduced by more than 80%, the quality of the tobacco leaves is better than that of the comparative example, and the yield is increased by more than 30% compared with the comparative example.
Embodiment 3
[0074] Substantially the same as Example 1, the difference is that every mu land uses 400ml of Difulai tobacco fertilizer,
[0075] The dosage of Woyiduo per mu is 200ml of HYT-A, 350ml of HYT-B and 80g of HYT-C.
[0076] Compared with the control method of the comparative example, the incidence of tobacco aphids in the tobacco field adopting the control method of this embodiment is reduced by more than 70%, the quality of the tobacco leaves is better than that of the comparative example, and the yield is increased by more than 30% compared with the comparative example.
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