Study of appearance of leaf and stem spot disease on Asalio (Lepidium sativum L.) under epiphytotic condition caused by Alternaria alternata (Fr.) Kiesser

Abstract

Alternaria leaf and stem spot disease caused by Alternaria alternata (Fr.) Kiesser is serious aerial disease, commercially grown Asalio crops (Lepidium sativum L.) in western Madhya Pradesh of India. The present study investigated the effect of temperature, relative humidity and rain fall during 2009-10. Relative humidity is found to be 42.42% minimum and 84.14% maximum an average 63.28%, temperature 4.9 °C minimum and 29.14 °C maximum an average 17.02 °C and rain fall 20.0 mm, these indicate that moderate temperature high humidity and moderately rainfall are favorable for the development of leaf and stem spot disease on Asalio.