Multifunctional organisms such as Trichoderma
harzianum Rifai 1295-22 appear to enhance plant growth by
solubilising phosphate (P) and micronutrients required by plants,
such as iron and manganese, and also suppresses plant pathogens
(Altomare et al., 1999). HCN production suppresses microbial
growth and may inhibit pathogens such as root-knot, bacterial
canker and black rot in tomato and tobacco