论文部分内容阅读
根据D.A.Gre- aves等报道,用空中摄影技术对冬小麦受黄矮病(BYDV)的危害进行鉴定,可取得比地面实测更客观的资料。1977年在英国东部对成熟和未成熟的小麦进行了航空摄影,其鉴定方法和取样单位与常规鉴定法相似。这些取样的照片对BYDV和煤污病(Cladosporium Spp.)的发
According to reports by D.A. Greves et al., Aerial photographic techniques were used to identify the hazards of BYDV in winter wheat and more objective information than the ground-based data was obtained. In 1977, aerial photography of mature and unripe wheat was conducted in the eastern part of the United Kingdom. The identification methods and sampling units were similar to the conventional identification method. The photos of these samples were taken on BYDV and the coal smudge (Cladosporium Spp.)