Biological control of Botrytis cinerea on tomato stem wounds with Trichoderma harzianum

摘要: The effectiveness ofTrichoderma harzianum in suppression of tomato stem rot caused byBotrytis cinerea was examined on pieces and whole plants. Ten days after simultanous inoculation withB. andT. harzianum, the incidence infected reduced by 62–84%, severity infection 68–71% intensity sporulation 87%. Seventeen wounds plants, 50 33% at 15 26 °C, respectively, leaf scar sites main 60 50%, respectively. Simultanous pre-inoculation withT. gave good control ofB. (50 90% disease reduction, 10 inoculation). rate rotting not biocontrol agent once established. However, byB. specifically these pieces. Temperature had a greater effect than vapour pressure deficit (VPD) efficacy biocontrol. Suppression byT. significant °C higher temperatures up to °C. Control significantly lower VPD 1.3 kPa (60% reduction), VPD<1.06 (90–100% control). Reductions grey mould were generally affected range 0.59–1.06 kPa. Survival ofT. stems both temperature greatest low ° C high VPD.