Effectiveness of Trichoderma virens in controlling mango anthracnose
J. Jomduang, S. Aemprapa and T. Manond.
Journal of Plant Pathology Volume 90 (2, Supplement) August 2008, Book of Abstract, 9th International Congress of Plant Pathology, August 24-29, 2008 Torino,Italy,. 507 pages.
2008
บทคัดย่อ
Effectiveness of Trichoderma virens in controlling mango anthracnose
Chemical fungicides have been used for controlling mango anthracnose,caused byColletotrichum gloeosporioides,for a longtime inThailand. However, the disease still causes serious damageon mango produce. Therefore, antagonistic microorganismsare proposed as alternatives. The present study was done to evaluatethe effectiveness ofTrichoderma virensto control anthracnoseby spraying on mango trees in an orchard, 3 or 5 times startingfrom bearing thumb-sized fruits. Three sprays were applied at30-day intervals while five sprays were applied at 15-day intervals.Air-dried PDB-biomass ofT. virensmixed with rice bran(1:1 w/w) was used at a concentration of 100 g per 20 litre of water.Anthracnose development on mango fruits was determined,using 0-6 disease scoring, at two weeks after ripening. The resultshowed that 5 sprays ofT. virenscould reduce anthracnose developmentas effectively as 3 sprays of the chemical fungicide mancozeb.This was indicated by disease scores of 1.09 and 1.00, respectively.Five sprays of mancozeb provided the best control(disease score of 0.6). Meanwhile, threeT. virenssprays providedsatisfactory control (disease score of 1.58) even though less effectivethan the fore-mentioned treatments. All treatments significantlyreduced anthracnose compared to the non-spraying (control)treatment which showed a disease score of 2.49.