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자료유형
학술저널
저자정보
Chung, Bu-Keun (Division of Plant Environment, Kyongnam Agricultural Research and Extension Services)
저널정보
한국응용곤충학회 Journal of Asia-Pacific Entomology Journal of asia-pacific entomology 제4권 제2호
발행연도
2001.1
수록면
149 - 155 (7page)

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Division of Plant Environment, Kyongnam Agricultural Research and Extension Services A relationship between damage of eggfruits and the number of Frankliniella occidentalis (Pergande) on eggplant leaves was determined in a plastic eggplant greenhouse under various insecticide application schedules. The damage of eggfruits was evaluated by the four independent evaluators using a damage scale from 0 (leastdamaged) to 5 (most damaged). There was no significant difference in damage grading between evaluators. A relationship between the expected portion of marketable eggfruits and an average degree of damage was determined to provide a standard for a specific market. The proportion of marketable fruits was determined at the guidelines of three market acceptance (A, B, and C) levels: The A, B and C accept only<1, <2 and <3 damage scaled eggfruits, respectively. Eggfruits included in the scale 1 had <7 thin lines or <3.0 thick lines on the surface of the fruit. The scale 2 had >7 thin lines or >3.0 thick lines. The scale 3 had one patch of bleaching with/ without any lines on the fruits. At acceptance A, the marketable proportion was 47, 38, and 20% among the harvest eggfruits of <1, <2 and <3 damage scale, respectively. The proportions at acceptance B and C were 80, 70 and 48%, and 93, 84 and 61%, respectively. An average degree of damage was correlated with the accumulated logarithmic number of F. occidentalis on the eggplant leaf during 10 to 5 days before harvest. Damage scale of <1, <2 and <3 was equivalent to 1.9, 7.4 and 28.8 insects per leaf per day, respectively, during the period.

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