KẾT QUẢ NGHIÊN CỨU KỸ THUẬT CANH TÁC VÀ QUẢN LÝ DỊCH HẠI TỔNG HỢP CHO MỘT SỐ GIỐNG LẠC MỚI TẠI HUYỆN QUỲ HỢP, TỈNH NGHỆ AN

This study has been conducted in Quy hop district, Nghe An province for field trial of new groundnut varieites for their adaptation ability and other agronomic traits. The result showed that the variety L14 and L23 were yielded 21 quintals/ha and 29.6 quintals/ha, increasing 53% and 50%, respectively, in comparíon to the local check variety Sen Nghe yielded 13.7 quintals/ha. The result showed that the most optimum sowing dates in spring season are from February 1st to 5th; Meanwhile, in the autumn winter is from August 25th to 28th. The suitable sowing density is 40 plants/m2 and optimate spacing is 25 cm x 10 cm with the row size of 1 m. The rational fertilizers rates are 60 kg urea +450 kg phosphate + 120 potasium per ha. Using plastic mulching in both seasons has got good result in keeping high mosture and diminish weeds in the rows. For IPM implementation there are some used techniques used such as seed treatment by Elnado 40FS with a dose of 5ml/10 kg seed can reduce 95% of seedling damping- off disease; Use of Trichoderma with 60 kg/ha before sowing can also give good result in controling some soil-borne diseases. For controling Lepidoptera insect it the applition Kinalux 25EC or Regent 800 WG has got control efficacy from 92.45 to 98.74% at 1-4 days after spraying. Biological pesticide BT has indicated very high efficacy of 72.54% against some Lepidoptera insects. Demonstration field models have been conducted in farmer fields and also gave good results in groundnut yield and pest reduction and seed quality.