BIOLOGICAL CONTROL OF ROOT PATHOGENIC FUNGI BY TRICHODERMA

K. Thinggaard
The antagonist Trichoderma harzianum Rifai is able to protect against many plant pathogenic fungi. Glasshouse trials with biological control of black root rot (Phomopsis sclerotioides Kest.) in cucumber with T. harzianum were carried out. The cucumbers were grown in rockwool (Grodania A/S). Seeds and rockwool mats were treated with spores of the antagonist. After a growing season (February–August), the total yield in plants attacked by the pathogen was 14% higher in the plots treated with the antagonist than in the non treated. Also an increased yield before pathogen inoculation was observed, which indicates that T. harzianum was able to stimulate the plant growth. The root test showed a correlation between high content of Trichoderma and increased yield in treated plots in May and June. Trichoderma population on the roots declined through the growing season and made the antagonist unable to inhibit the pathogen enough, so attack could be prevented. Improvement of the treatment with the antagonist and more research of its growth stimulating effect should be done.
Thinggaard, K. (1988). BIOLOGICAL CONTROL OF ROOT PATHOGENIC FUNGI BY TRICHODERMA. Acta Hortic. 221, 212-212
DOI: 10.17660/ActaHortic.1988.221.20
https://doi.org/10.17660/ActaHortic.1988.221.20

Acta Horticulturae