รายละเอียดบทคัดย่อ


Jamornmarn, S., S. Kemma and K. Suwan. 2532. Insect management on mungbean pests in rice Based cropping system.  ใน: รายงานการสัมมนาระบบการทำฟาร์ม ครั้งที่ 6 : . ระหว่างวันที่ 27-30 มีนาคม 2532 ณ มหาวิทยาลัยขอนแก่น จ. ขอนแก่น.  น.186-194.

บทคัดย่อ

         Studies on insect pests and their damage were undertaken in Ratchaburi province to determine the best possible cropping pattern among Rice-Rice, Rice-Sweet Com-Rice and Rice-Mungbean-Rice. The result from two years (1987-1988) shows that the pattern of Rice-Mungbean-Rice is the most suitable cropping pattern to be grown in this area. Added costs, added returns and "marginal benefit cost ratio (MBCR)" on the additional costs for three levels of insecticides (Economic threshold, Next Higher, and Maximum Protection) were evaluated on both sweet corn and mungbean in rice based cropping system. The result revealed that economic threshold treatment is the only one that would be economically attractive in the three levels of insecticide for both crops. Insect pests, insecticide use, expense, yields and profit were monitored in insect management plots and farmers' fields in Ratchaburi province. Insect populations were slightly higher than economic thresholds. In the management plots insecticide averaging about 3.0 times of the recommended dosage was applied, but farmers in the profect area treated their field more frequently. About 40 percent less insecticide was applied in the insect management plots compared to farmers' fields. Yield and profit were slightly higher in insect management plots than in the farmers' field.