고설재배 딸기에서 황색점착트랩의 설치높이에 따른 해충과 천적의 유인특성

Abstract

The optimal installation position of yellow sick trap (YST) according to insect pest species and the types of crop cultivation is essential to increase the efficacy. This study was conduct to evaluate the vertical space where insect pests are attracted to YST in a strawberry farm with high-bed system. A small size of YST (12.7 x 7.5 cm, single side) was installed vertically around the bed-bench of high-bed system in a dimension of 3 x 7 (column x row). The first layer of YST (namely horizontal row traps with denoted by the center = B, the right = A and the left = C) was installed at 70 cm height from the ground, which was located below the bed-bench (27 cm width and 90 cm height). The position of trap B was arranged at the center line of bed-bench, and A and B were away 50cm from C to both sides. The traps for the second to seventh layer were arranged from 30 cm above the bed-bench to 180 cm by 30 cm intervals; resulting in 3 columns of A, B, C and seven rows of 1 to 7 (total 21 YSTs). The dimension of 3 x 7 was separated into two data sets of A-B and B-C (each 14 YSTs) for the purpose of data analysis. In each data set, finally, the ranking of a YST in the number of pests or natural enemies was assigned to find YST positions within the third ranking. The positions with high ranking were A1, B3, B4, C1 and C3 in aphids, A1, A2, B3 and C1 in thrips, A1, A2, A3, B3, C1 and C2 in white flies, A1, A3, A4, B2, B3, C2 and C3 in Cicadellids and B1 in Sciarids. Common position that has high ranking for all insect pest surveyed was B3. There were on YST positions within the third ranking above the forth layer. Natural enemies were mainly attracted to the A1, B2 and C1 in total, A1, A2, B2, C1 and C2 in Chalcidoids, A1, B1 and C1 in Aphidinae. In overall natural enemies were frequently attracted to 1A and 1C. In conclusion, the optimal position of trap placement for monitoring or controlling pests with the least damage to natural enemies in the cultivation of high-cultivated strawberries was determined to be 30 ~ 60 cm height (B3) directly above from the bed. In this study, the proper locations of YST monitoring for natural enemies as well as the pests were verified. If desired, it is also possible to select positions to kill less natural enemies and attract more pests. This result can be presented appropriate guideline for the use of YST in the strawberry farm with high-bed system.