The effect of forcing biochemical factors on the growth and development of tomato plants disease Fusarium wilt

Ahmed A. Alnuaimy Jawad k. Al – Janabi Laith Abdul Hassan
College of agriculture College of Life Sciences College of Life Sciences
University of Muthanna University of Babylon University of Muthanna
ABSTRACT
This study was aimed to evaluate the effectiveness of some of chemical (salicylic acid and calcium chloride) and biological factors (Trichoderma harzianum) and the extract of tomato plant debris on resistance induction in tomato plants against Fusarium wilt disease Fusarium oxysporum f.sp lycopersici and on growth parameter of this crop.
The effect of pre-inoculation treatments of biotic and abiotic inducers to tomato plants in green house conditions against F. o. f. sp. lycopersici , revealed that SA, CaCl2 and T. harzianum which applied three days before inoculation with the pathogen (FOL), were completely prevented disease incidence and disease intensity in tomato plants. Extract of tomato debris revealed less inhibitory effect on percent infection and disease intensity of wilt disease which reduced to 35.24 and 20.94 respectively by un-sterilized extract and to 100% and 90.94% by sterilized extract compared with that treated with pathogen only.
In contrast, the use of chemical and biological factors, led to increased growth parameters, height, fresh, dry weight of shoots and roots and chlorophyll content in tomato plants treated with SA, CaCl2 and T. harzianum in comparisons with that in untreated plants.
Lycopersicon esculentum, Fusarium oxysporum f.sp. lycopersici, induced resistance Key words:
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