Abstract
Fruit rot disease of sweet pepper is one of the main fungal diseases causing huge economic losses to the grower. An experiment was conducted to find out the fungal pathogen associated with fruit rot disease of sweet pepper, obtained from experimental fields of Jahangirnagar University, Bangladesh. Fruit rot disease-causing fungus was isolated from infected fruits and identified using morphological characterization based on colony features, mycelia, conidia as well as molecular characterization based on internal transcribe spacer (ITS) region of the fungus. ITS sequence of our studied fungus MH368146.1 was genetically 99-100% similar to sequences of Fusarium solani in NCBI database. Typical fruit rot symptoms were reproduced by artificial inoculations of the isolated fungus. The mycelial growth of this fungus was evaluated on ten different solid culture media i.e., Potato Dextrose Agar, Yeast Extract Agar, Honey Peptone Agar, Hansen’s Medium, Sabouraud’s Glucose Agar, Kauffman’s Agar, Potato Sucrose Agar, Richard’s Agar and Carrot Agar. Fungus grew well on all tested solid culture media. Several bio-control agents and two commercial fungicides were evaluated against isolated fungus under in vitro condition, in which the highest percent inhibition of radial growth of the fungus was determined as 64.75% due to Trichoderma reesei isolate 2, and 60.63% by Tilt 250 EC (500 ppm) at 7 days post-incubation. Therefore, T. reesei was found as the most suitable to control the growth of F. solani under laboratory conditions. However, further pot and field trials needed to be confirmed the bio-control potential of it. Int. J. Agril. Res. Innov. Tech. 11(2): 108-116, Dec 2021
Highlights
Sweet pepper (Capsicum annuum) belongs to the Solanaceae family, is one of the important vegetables in most European and North American countries
Our study revealed an antagonistic effect of biocontrol agents (T. reesei T. harzianum and rhizospheric soil bacteria B. subitilis) against F. solani under lab bioassay
Fusarium solani causing fruit rot disease of sweet pepper is responsible for reducing the quantity and quality of the product at pre and post-harvest period
Summary
Sweet pepper (Capsicum annuum) belongs to the Solanaceae family, is one of the important vegetables in most European and North American countries This crop is mostly grown in glasshouse conditions. A severe outbreak of this disease resulted in a 50% yield loss in Ontario, Canada under greenhouse in 1990 (Jarvis et al, 1994) Other species such as Fusarium subglutinans (Utkhede and Mathur, 2004), Fusarium lactis, Fusarium proliferatum and Fusarium oxysporum (Yang et al, 2009) known to cause fruit rot of sweet pepper. Diseases causing fungal spores germinate on the young seeds or internal parts of the fruits at early stages of infections, and sunken lesions appear on the fruit surfaces at later stages (Poucke et al, 2012). Organic and ecological harmless substitutes, for example, bio-control agents, natural plant metabolites, and cultural techniques are being investigated for conceivable
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