An experiment was conducted to study the effect of antagonist Trichoderma harzianum and different fungicides
for the control of guava decline (Psidium guajava) in-vivo at the research area of Department of Plant Pathology
University of Agriculture Faisalabad. Guava decline is a serious disease caused by different pathogens
Botryodiplodia theobromae, Fusarium oxysporum f. sp. Psidii, Phytophthora parasitica and Fusarium solani f. sp.
psidii. The disease can be controlled effectively through antagonists but effectiveness increases when fungicides
are used as soil drenching alongwith antagonists. This paper reports in vivo evaluation of fungal antagonist T.
harzianum and the fungicides Topsin-M, Alert plus and Reconil-M for the control of guava decline. Various
experiments were conducted to analyze the effectiveness of antagonist and fungicides for the control of disease.
It was found that in control, where no fungicide and antagonist was added in soil, it showed ample disease
intensity i.e. 24-57% and 44.15% in sterilized and unsterlized soil respectively. Statistical analysis revealed that
disease intensity was zero and 0.74% when treated with T. harzianum and Topsin-M as drenches in sterilized and
unsterlized soil and showed maximum control of disease.
Aftab Ali Bokhari, Shahbaz Talib Sahi, M. Aslam Khan, Rashid Ahmad, Islam-ud-Din. (2008) In vivo studies on the biological and chemical control of guava decline caused by different soil borne pathogens, , Volume-45, Issue-1.
