Tomato (Solarium lycopersicon L.) is an important off-season vegetable crop grown during March to October in Mid hills of Himachal Pradesh and fruits are transported to the northern plains where these are sold at premium prices. Now with the introduction of polyhouses, this crop is also grown during winters under protected cultivation conditions and fruits are available round the year. Due to the prevalence of high humidity and temperature under protected cultivation conditions, the crop is severelyinfected with leaf spotting fungi viz., Alternaria solani, A. alternata, A. alternata f.sp. lycopersici and Septoria lycopersici.
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