Biological Control of Chili Anthracnose Disease with Rhodotorula Spp.

摘要

This study aims at determining the ability of yeast Rhodotorula sp. to inhibit the infection and anthracnose disease on chili during the test both in the laboratory and on the field. The fructosphere isolation resulted in seven yeast isolates of Rhodotorula sp whose colonies are pink, reddish, coral. On the Rodhotorula the medium of glucose peptone yeast agar extract, well known as GPY medium, the mucoid colony appeared to be soft with a smooth surface. The edge of the colony was flat while the cell is oval and hyaline and it reproduces by single cell budding. The yeast cell formed faint capsules. There was no finding of any ascospore. There was no finding of existing true hyphae nor pseudohyphae. The laboratory test, all the yeast of Rhodotorula sp. isolates were effective in inhibiting the anthracnose disease which was to reduce the diameter of anthracnose spot. The inhibition effectiveness was ranging around 35-73% on the bruised chili fruit condition. The Rhodotorula sp. during the field test was effective in controlling the anthracnose disease caused by Colletoreichum acutatum fungi. The effectiveness was shown by the reduction of the visible intensity of the disease. The controlling effectiveness reached 97%.