《Table 2 Effect of different hanging heights of traps on the trapped number of S.litura》

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《Effect of Trap Space Layout on Trapped Number of Spodoptera litura in Tobacco Field》

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As shown in Table 2，the traps could catch S.litura at the hanging heights from 1 m to 50 m（even higher），and the trapped number was the largest at the hanging height of 2.0 m，when the number was 607.67.There was only a small difference in between the hanging height of 1.0 and 5.0 m，which had the trapped number of 472.67 and 393，respectively，while the total trapped number of S.litura gradually decreased when the hanging height was over 5.0 m.the results indicated that S.litura had strong diffusion ability and large activity space，and the number of active S.litura was the largest at a height of about 2 m.Combined with tobacco growth，climate，cost and other factors，the optimal hanging height of the traps for S.litura was 1.5-2.0 m.