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发明公开
CN87100857A 防虫害的薄膜或薄板 失效 - 授权

防虫害的薄膜或薄板
摘要：
一种防虫害的薄膜或薄板，它在波长小于0.4微米的紫外线范围内，具有一反射光谱，具体地说，是在波长小于0.4微米时，它具有一反射光谱峰，且具有紫外线反射率(RA)与波长为0.5微米的可见光反射率(RB)之比不小于1.4的反射光谱，以及具有不小于40％的可见光透光率，该薄膜或薄板可用来覆盖温室或坑道，或用来覆盖栽培作物的土壤，或用作农业、林业和园艺中的各种虫害的防虫剂。
摘要（英）：

An insect-repelling film or sheet which has a reflective spectrum in the ultraviolet region at a wavelength of less than 0.4 mu m, particularly a reflective spectrum peak at a wavelength of less than 0.4 mu m, a reflective spectrum with a ratio RA/RB of not less than 1.4 wherein RA is the ultraviolet reflectance and RB is the visible light reflectance at a wavelength of 0.5 mu m, and a visible light transmission of not less than 40 %,is useful as a cover for greenhouses and tunnels or for mulching of the ground for crop culture or as a repellent for various insect pests in agriculture, forestry and gardening.

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