1. Pathological Studies of Sclerotium rolfsii causing Foot-rot disease of Brinjal (Solatium melongena Linn.).
- Author
-
Chaurasia, Shridha, Chaurasia, Amit Kumar, Chaurasia, Shubha, and Chaurasia, Sushmita
- Subjects
- *
SCLEROTIUM rolfsii , *EYESPOT (Plant disease) , *FUNGAL diseases of plants , *ORGANIC compounds , *SCIENTIFIC observation , *COLOR of plants ,EGGPLANT diseases & pests - Abstract
During the regular survey of local brinjal growing field of Tikamgarh, it was observed that brirjal plants have been severely affected from a foot-rot disease caused by Sclerosant rolfsii sacc. It was also observed that the incidence of disease was much more in those areas where dead decaying plant debris and other organic matter accumulated near the plants. When disease plants uprooted and examined closely, it was seen that the basal portion of stem at foot region was infected and became dark brown in colour with superficial rotting. In some cases at collar region of stem on rotting tissues, superficial frosty growth of pathogen was observed which the characteristic symptoms of the pathogen are. In the experimental study the effect of four types of inoculum viz., sand oatmeal inoculum, infested wheat grains inoculum, seclerotia inoculum and mycelial suspension inoculum have been tested and investigated on the development of foot rot disease in sterilized and un-sterilized soil conditions. Sand oatmeal inoculum and infested wheat grains inoculum were proved to be the best as they cause 100% disease development and all the ten inoculated plants were collapsed in sterilized as well as in un-sterilized soil condition. In host range study of Sclerotium rolfsii, seedlings of ten different host species were tested in culture tubes against Sclerotium rolfsii by artificial inoculation method. Out of ten plant species, only five species namely chilli (capsicum annum). Fenugreek (Trigonella foenwn-graeatm). Gram (Cicer arietinam). Tomato (Lycopersicon esculentum) and Wheat (Triticum vuigare) were found to be most susceptible, as degree of highly infection have been recorded in them and these plant species were completely collapsed within 10 days. Groundnut (Arachis hypogaea). Lady's finger (Abehioschus esculentus), Linseed (Linum usitatissimum) and Sunnhemp (Crotalaria juncea) were found to be moderately susceptible. Ben (Dolichos lablab) was found to be resistant to some extent against Sclerotium rolfsii as a degree of a poor infection has recorded. It reveals that Sclerotium rolfsii has got a wide host range and the degree of infection differs from host to host. [ABSTRACT FROM AUTHOR]
- Published
- 2014