In this paper, the extraction, purification, bioassay and the characteristic of physical chemistry of the toxin produced by Phytophora capsici were systemically researched. The effect of the toxin on the ultra structural organization and the leakage of cell membrane, and the activity of disease resistant enzyme, the content of chlorophyll and MDA were also analyzed, and determined resistance of 50 squash material . The main results were as follows :
Some optimal production factors of ...