ประสิทธิภาพของพืชกับดักร่วมกับ Banker Plant System ในการควบคุมแมลงศัตรูพืชในพริก

Abstract

Supporting the balance of an agricultural ecosystem is an approach to control pest infestations. A trap crop consists of plants that attract the insect pests from the main crop. It can be combined with a banker plant system, in which these plants are used to rear prey that attracts predators, natural enemies of the pest insects. Such combination was studied in field plots. The three alternative chili plot treatments were 1) chili plot with eggplant as trap crop and banker plant system composed of goose grass for Hysteroneura setariae (Hemiptera: Aphididae) rearing. This banker plant attracted beneficial insects. 2) Chili plot without insecticide, and 3) chili plot with insecticide. The results show that chili plot with trap crop and banker plant and chili plot without insecticide had better balanced insect and spider populations than chili plot with insecticide. The numbers of natural enemies to pests was higher than number of insect pests in chili plot with trap crop and banker plant, and in chili plot without insecticide. The species diversity indexes of insects and spiders of chili plot with trap crop and banker plant system was highest. This result indicated that trap crop and banker plant system support diverse arthropod community in the agro-ecosystem. Result indicated that eggplant Solanum melongena L. (Solanacee)was suitable trap crop for attracting chili fruit fly Bactrocera latifrons (Hendel) (Diptera: Tephritidae) away from chili, main crop. Then yield of chili plot with eggplant as trap crop and banker plant system was higher than yield of chili plot without insecticide. Insect pest management of chili plot using eggplant as trap crop with banker plant system can attract natural enemies inhabit in the plot, supporting balance of agricultural ecosystem of the plot and decreased yield damage from B. latifrons. Although, yield was lower when compared with yield of chili plot with insecticide, cost was lower and higher in value of free - insecticide product.