The paper used data which came from the Chinese Ministry of Finance and the State Forestry Administration cooperation "Poverty Reduction in Priority Forestry Programs" and included 2070 sampling rural households of the year 1999~2008. It analyzed the impact of farmland area converted to forestland and time for rural household's participating in Sloped Land Conversation Program (SLCP) on rural household's forest, land-based and off-farm labor supply making use of Tobit econometric model. The findings of this study were as follows. Firstly, farmland area converted to forestland and time for rural household's participating in SLCP could increase rural household's forest and off-farm labor supply, while decrease land-based labor supply significantly. Secondly, impact of SLCP on labor supply for forest activities, land-based-activities and off-farm activities in Yellow River Basin is more than that in Yangtze River Basin. Thirdly, SLCP is not only promoting farmer's labor supply transferring from farmland to off-farm job, but also increasing farmer’s off-farm labor supply.

<正>近年来,绿盲蝽危害葡萄日趋严重。由于绿盲蝽虫体小,危害发生早,白天隐藏,夜里活动,危害初期受害症状不明显,常造成防治不及时,影响葡萄正常生长。1绿盲蝽危害状绿盲蝽以刺吸式口器串食葡萄嫩芽叶,被害处形成红褐色针头大小的坏死点,随叶片的伸展长大,以