Detection of Sclerotinia rot incidence in indian mustard from polar orbiting satellite platform
Satellite-sensed detection of disease incidence in crops using optical radiometry depends on degree of loss of greenness of canopy based on differentiation of reflectance patterns between disease-free and diseased crop patches. Crop identification and discrimination between crops from polar orbiting Indian satellite sensors with narrow multi-spectral optical bands in green (450-550 nm), red (550650 nm), near infrared or NIR (650-750 nm), short-wave infrared (1100-1200nm) and middle infrared or MIR (1500-2000 nm) were standardized. This uses digital data from Indian Remote Sensing (IRS) satellite P6 Linear Imaging Self Scanning (LISS)-Ⅳ, 1D LISS-Ⅲ, IRS P6 Advanced Wide Field sensors with spatial resolutions varying 5.6 m-60 m representing field to local scales with repeat visits at 5-25 day intervals. Sclerotinia rot (Sclerotinia sclerotiorum) is a major soil borne disease in mustard (Brassica juncea) causing premature drying of crops that leads to yield losses up to 40％ in India. First week of Feb 2005 witnessed cold (max temp: 19-23.1℃; min temp: 1.7-8℃) and humid (moming relative humidity: 97-100％;afternoon relative humidity: 43-79％) spell with sunny (8.0-10.2 hours bright sunshine) days accompanied by night rainfall (2.7 mm) at Bharatpur (27°12′N; 77°27′E), which resulted in high soil moisture and conditions favourable for the disease. Cloud-free hyperion photograph having 7.5 km swath and 142 km long track coverage were acquired on 24 Feb 2005. Sclerotinia rot incidence, ranging 10％-60％ was recorded from 20 mustard patches along with Global Positioning System coordinates within a study area of 20 km×5 km. Cloud-free LISS-Ⅳ (5.6 m) images over Bharatpur were used to identify distribution of mustard patches. Different pigment and water sensitive spectral regions in hyper-spectral bands from hyperion were identified sensitive to Sclerotinia incidences by comparing with ground observed incidence with disease-water-stress-index-Ⅴ (radiance or R800-R550)/(R1660+R680) found better correlated with ground truth. This group records the first report of use of data onboard satellite platform for disease detection in India.
Brassica juncea Sclerotinia sclerotiorum remote sensing disease detection hyperspectral band
B.K.Bhattacharya C.Chattopadhyay S.Dutta R.L.Meena Sumana Roy J.S.Parihar N.K.Patel
Agricultural Resources Group, Space Applications Centre, ISRO, Ahmedabad 380015, India National Research Centre on Rapeseed-Mustard, ICAR, Sewar, Bharatpur 321303, India
国际会议
第十二届国际油菜大会( The 12th International Rapeseed Congress)
武汉
英文
1343-1347
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）