The data correlated regarding the effect of atmospheric temperature, relative humidity and rainfall on disease development during 2002-03 and 2003-04 revealed that, moderate relative humidity accompanied by nearly moderate temperature favoured disease development in both the years. The maximum disease development was recorded in the second fortnight of November during both the years. The average maximum and minimum temperatures and relative humidities were , and , per cent, respectively during 2002- 03, whereas during 2003-04 average maximum and minimum temperature were and ºC, respectively with average maximum and minimum relative humidities of and per cent, which led to maximum disease development. The rainfall in January led to rise in relative humidity and fall in atmospheric temperature hampered the disease development. | Effect of atmospheric temperature, relative humidity and rainfall on disease development of Alternaria alternata causing alternaria leaf spot and fruit rot of chilli under natural conditions
