SUPPRESSION OF FUSARIUM WILT OF TOMATO BY SEED, SEEDLING AND SOIL TREATMENTS WITH CERTAIN FUNGAL AND BACTERIAL BIOCONTROL ORGANISMS.

Document Type : Original Article

Author

Plant Pathology Res. Inst., ARC, Giza, Egypt

Abstract

Three different cultivars of tomato were treated with biocontrol agents. these
biological agents were, Pseudomonas fluorescens, Trichoderma harzianum ,
commercial powder ( Rhizo-N ) containing Bacillus subti/us , commercial liquid ( Plant-
Guard ) containing T. harzianum, Rizolex T -60 ,combinations between Rhizo-N ,
Plant-Guard and P. fluorescens, T. harzianum. The treated seeds were evaluated for
seed germination and vigour index. The treated seedling and soil were evaluated for
reduction the percentage of Fusarium wilt. It was found that seedling in treatment was
more effective in reducing Fusarium wilt than soil treatment. Also, P. flourescens was
more effective in increasing seed germination, vigour index and reduction of Fusarium
wilt, followed by combination between P. nuorescens, T. harzianum, T. harzianum,
Rhizo-N , Plant-Guard and the combination between Rhizo-N , Plant-Guard. Rizolex
T -60 treatments was the test effective.

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