The study was conducted to determine the knowledge and practices of vegetable farmers in Hanoi, Vietnam in controlling mites, and their attitude towards N. longispinosus as biological control agent against T. urticae on green bean. The field surveys conducted in Tang My and Son Du hamlets, two of the largest vegetable production areas in Dong Anh district, show that the respondents in Tang My who had training on the vegetable IPM program had higher knowledge on green bean pest management and knew better about natural enemies and biological control than the ones without training in Son Du. However, both groups of respondents did not have enough knowledge on spider mite control and most of them did not know or hear about predatory mite before. Hence, 40 percent of the respondents said they would not use predatory mites, and 33 percent were still uncertain whether they will adopt this biological control. The paper suggests some recommendations to enhance farmers’ use of biological control against mites on green beans.

• Nguyen Duc Tung(MS Entomology College of Agriculture, University of the Philippines Los Baños Laguna, Philippines) Corresponding author
• Celia DR. Medina(University of the Philippines Los Baños Laguna, Philippines)
• Luis Rey I. Velasco(University of the Philippines Los Baños Laguna, Philippines)
• Josefina T. Dizon(University of the Philippines Los Baños Laguna, Philippines)