Effect of Temperature and Relative Humidity on Occurrence of Trichoderma Species

Trichoderma citrinoviride, T. harzianum and T. koningii were recorded when the temperature ranged between 12.7–19.3°C with 63–67% humidity level and the rainfall recorded to the extent of 32.2mm. T. flavofuscum was isolated at 10.5–28.1°C, thus, more prevalent at wider range of temperatures. T. hamatum was best at 22.6–31.1°C with humidity ranging between 60–70%, whereas T. virens was recorded best during May and June months when temperature was recorded between 31.2–33.7°C with 46–51% humidity. However, T. viride was recorded best during November to February when temperature ranged between 15.5–19.3°C.