藥毒所98年度

52 表 17. 南黃薊馬二齡幼蟲及成蟲期不同獲毒時間後在西瓜及洋香瓜苗上傳播西瓜銀 斑病毒之效能 Table 17. The efficiency of Thrips palmi 2 nd -instar larva and adult transmission WSMoV after different acquisition access period Inoculation host No. of virusliferous thrips inoculated No. of plant trans- mitted No. of plant infected % transmis- sion AAP IAP Stage period Stage period 2nd- instar larvae 24h 2nd- instar larvae 48h watermelon 1 15 0 0 5 14 1 7.10 cantaloupe 5 33 0 0 sum 62 1 1.6 2nd- instar larvae 24h adult 48h watermelon 1 21 0 0 cantaloupe 1 4 0 0 5 10 2 20.0 sum 35 2 5.7 2nd- instar larvae 48h adult 48h watermelon 1 17 0 0 5 4 0 0 cantaloupe 1 16 0 0 5 25 3 12.0 sum 62 3 4.8 adult 24h adult 48h watermelon 1 6 0 0 5 13 0 0 cantaloupe 5 18 0 0 sum 37 0 0 48h 48h watermelon 5 8 1 12.5 cantaloupe 1 9 0 0 5 4 1 25.0 sum 21 2 9.5