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测定了筛选木霉菌株ＮＦ９和ＴＣ３对喀麦隆芋艿根腐病病原真菌的体外拮抗作用。在对峙培养中，ＮＦ９和ＴＣ３对群结腐霉（Ｐｙｔｈｉｕｍｍｙｒｉｏｔｙｌｕｍ）（Ｐｍ），立枯丝核菌（Ｒｈｉｚｏｃｔｏｎｉａｓｏｌａｎｉ）（Ｒｓ）和茄镰孢（Ｆｕｓａｒｉｕｍｓｏｌａｎｉ）（Ｆｓ）的拮抗系数分别为１—２，１，１．在赛珞玢分层培养中，ＮＦ９对Ｐｍ，Ｒｓ，Ｆｓ的菌丝生长抑制率分别为１００％，９３．４％及５５．３％；而ＴＣ３对上述真菌的抑制率分别为１００％，９２．１％及４６．４％，光学显微镜下观察到ＮＦ９对Ｒｓ菌丝的缠绕和穿透；在不同温度（１０—３５℃）、不同酸度（ｐＨ３—９）条件下，在ＰＤＡ培养基上，ＮＦ９的菌丝生长均明显超过群结腐霉（Ｐｍ）．当ＰＤＡ培养基中瑞毒霉（Ｒｉｄｏｍｉｌ）的含量为２３ｍｇ／Ｌ及４６ｍｇ／Ｌ时，群结腐霉的生长完全受到抑制，而木霉菌株ＮＦ９和ＴＣ３的生长甚至超过对照（不含瑞毒霉）．实验结果表明了上述木霉菌株在病害防治中的应用潜力。
In vitro antagonism of Trichoderma strains NF9 and TC3 against root rot pathogens of taro root rot in Cameroon was determined. In confrontation culture, the antagonistic coefficients of NF9 and TC3 against Pythium myriotylum (Pm), Rhizoctonia solani (Rs) and Fusarium solani (Fs) were 1-2, 1,1. The inhibitory rates of NF9 on the mycelial growth of Pm, Rs and Fs were 100%, 93.4% and 55.3%, respectively. The inhibitory rates of TC3 to these fungi were 100%, 100% 92.1% and 46.4% respectively. The entanglement and penetration of NF9 to Rs mycelia were observed under light microscope. Under the conditions of different temperature (10-35 ℃) and different acidity (pH 3-9) On the other hand, mycelial growth of NF9 was significantly higher than that of Pythium pyogenes (Pm). When Ridomil in PDA medium was 23 mg / L and 46 mg / L, the growth of P. harzianum was completely inhibited, whereas the Trichoderma strains NF9 and TC3 grew even more than the control mold). The experimental results show that the Trichoderma strains in the application of disease control potential.