딸기온실에서 칠레이리응애를 이용한 점박이응애의 생물적방제법을 위한 방제효과 및 공간분포 분석 Control Efficacy and Spatial Pattern Analysis for Biological Control of Tetranychus urticae (Acarina : Tetranychidae) using Phytoseiulus persimilis (Acarina : Phytoseiidae) in Strawberry Greenhouses원문보기
In order to establish the two-spotted spider mite (TSSM), Tetranychus urticae (Koch, 1836) biological control in strawberry greenhouses, a fixed-precision-level sampling plan and spatial characterization with SADIE (Spatial Analysis by Distance IndicEs) were developed. The sampling was conducted sim...
In order to establish the two-spotted spider mite (TSSM), Tetranychus urticae (Koch, 1836) biological control in strawberry greenhouses, a fixed-precision-level sampling plan and spatial characterization with SADIE (Spatial Analysis by Distance IndicEs) were developed. The sampling was conducted simultaneously in four independent greenhouses (natural enemy plot, conventional plot) and 32 sampling positions were selected for each greenhouse to investigate TSSM population. TSSM was sampled by taking three leaflets (1 stalk) from each plant (3 three-leaflet) leaves from each sampling position. Natural enemy plot and conventional plot were selected to compare the mean density of TSSM. Natural enemy plot was released with Phytoseiulus persimilis (Athias-Henriot, 1957) and conventional plot was sprayed with commercial chemical pesticides. Each stage of TSSM density was higher in conventional plot than natural enemy plot. The management cost was lower at natural enemy plot than conventional plot. These results suggest that it is possible to effectively control TSSM by using P. pesrsimilis in strawberry greenhouses. The fixed-precision-level sampling plan consisted of spatial distribution analysis, a sampling stop line, and decision making. In this study, spatial distribution analysis was performed using TPL (Taylor’s Power Law). Decision making was undertaken using the maximum of action threshold in accordance with previously published method, and the value was decided by the price of the plants. Using the results obtained in the greenhouse, simulated validation of the developed sampling plan by RVSP (Resampling Validation for Sampling Plan) indicated a reasonable level of precision. SADIE processes analyze and characterize spatial distribution and spatial variation, based on spatial location information. SADIE was used to analyze spatial distribution and index of aggregation , index of clustering , were used to investigate the spatial distribution. Also, the clustering indices were mapped as red-blue plot. As a result, The spatial distribution of TSSM was varied, particularly, feeding ability and density of P. persimilis caused regular spatial distribution of TSSM.
In order to establish the two-spotted spider mite (TSSM), Tetranychus urticae (Koch, 1836) biological control in strawberry greenhouses, a fixed-precision-level sampling plan and spatial characterization with SADIE (Spatial Analysis by Distance IndicEs) were developed. The sampling was conducted simultaneously in four independent greenhouses (natural enemy plot, conventional plot) and 32 sampling positions were selected for each greenhouse to investigate TSSM population. TSSM was sampled by taking three leaflets (1 stalk) from each plant (3 three-leaflet) leaves from each sampling position. Natural enemy plot and conventional plot were selected to compare the mean density of TSSM. Natural enemy plot was released with Phytoseiulus persimilis (Athias-Henriot, 1957) and conventional plot was sprayed with commercial chemical pesticides. Each stage of TSSM density was higher in conventional plot than natural enemy plot. The management cost was lower at natural enemy plot than conventional plot. These results suggest that it is possible to effectively control TSSM by using P. pesrsimilis in strawberry greenhouses. The fixed-precision-level sampling plan consisted of spatial distribution analysis, a sampling stop line, and decision making. In this study, spatial distribution analysis was performed using TPL (Taylor’s Power Law). Decision making was undertaken using the maximum of action threshold in accordance with previously published method, and the value was decided by the price of the plants. Using the results obtained in the greenhouse, simulated validation of the developed sampling plan by RVSP (Resampling Validation for Sampling Plan) indicated a reasonable level of precision. SADIE processes analyze and characterize spatial distribution and spatial variation, based on spatial location information. SADIE was used to analyze spatial distribution and index of aggregation , index of clustering , were used to investigate the spatial distribution. Also, the clustering indices were mapped as red-blue plot. As a result, The spatial distribution of TSSM was varied, particularly, feeding ability and density of P. persimilis caused regular spatial distribution of TSSM.
주제어
#Strawberry Tetranychus urticae Phytoseiulus persimilis Fixed precision level sampling plan stop line SADIE Spatial distribution
학위논문 정보
저자
강주완
학위수여기관
경상대학교 대학원
학위구분
국내석사
학과
식물의학과 식물의학 응용곤충
지도교수
박정준
발행연도
2018
총페이지
viii, 82 p.
키워드
Strawberry Tetranychus urticae Phytoseiulus persimilis Fixed precision level sampling plan stop line SADIE Spatial distribution
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