Screening of Chilli Genotypes for Resistance to Fruit Rot caused by Colletotrichum capsici at Fruit Bearing and Harvest Stages

Five Trichoderma species/strains, Trichoderma virens IMI-392430, T. pseudokoningii IMI-392431, T. harzianum IMI-392432, T. harzianum IMI-392433 and T. harzianum IMI-392434 were tested against anthracnose and fruit rot of chilli. Effect of Trichoderma species in suppressing anthracnose and fruit rot as well as the growth and yield of chilli were evaluated. Seven treatments consisting of five Trichoderma strains, one Colletotrichum capsici and control were used as seed treatments. Chilli seeds were treated with spore suspension or secondary metabolites of each Trichoderma species/strain and C. capsici separately. Mixture of suspension of each Trichoderma species/strain with C. capsici was also used as spore suspension or secondary metabolites. Percent fruit infection in the control treatment was found almost similar to the treatment that contained T. viridae and T. pseudokoningii spore suspension or secondary metabolites. T. harzianum strains alone suppressed fruit infection (%) significantly. Further all the Trichoderma species/strains reduced the fruit infection (%) than the diseased control even when seeds were treated with Trichoderma separately mixing with C. capsici. Spore suspension of T. harzianum IMI-392433 was found much more effective against C. capsici which suppressed 95.8% and 79.6 % fruit infection respectively under natural (without C. capsici) and high inoculum pressure of C. capsici. All the tested Trichoderma species/strains showed higher plant growth and increased fruit yield irrespective of rest of the treatments. It was found that Trichoderma strains control chilli fruit rot significantly but high inoculum pressure of C. capsici reduced fruit yield drastically. Among the treatments, spore suspension of T. harzianum IMI-392433 increased the fruit yield 83.6% and 76.5% per plant compared to spore suspension of C. capsici and control treatments, respectively. These results implied that T. harzianum IMI-392433 can effectively control fruit rot of chili caused by C. capsici through host resistance and antifungal metabolite activity. The fruit yield was increased due to the influence of T. harzianum IMI-392433 on vigorous physiological growth of plants as well as efficacy against the disease. The Agriculturists 2018; 16(2) 75-87

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Biochemical studies on electrophoretic banding pattern among the different isolates of Colletotrichum capsici causing fruit rot in chilli

International Journal of Chemical Studies ◽

10.22271/chemi.2020.v8.i6g.10811 ◽

2020 ◽

Vol 8 (6) ◽

pp. 458-462

Author(s):

Rajappa Vithal ◽

Mina D Koche ◽

Aparna Tekade ◽

BT Raut

Keyword(s):

Banding Pattern ◽

Fruit Rot ◽

Colletotrichum Capsici ◽

Biochemical Studies

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Colletotrichum capsici. [Descriptions of Fungi and Bacteria].

IMI Descriptions of Fungi and Bacteria ◽

10.1079/dfb/20056400317 ◽

1971 ◽

Author(s):

J. E. M. Mordue

Keyword(s):

Capsicum Annuum ◽

Geographical Distribution ◽

Leaf Spot ◽

Fruit Rot ◽

Southern Europe ◽

Seedling Blight ◽

Plant Debris ◽

Colletotrichum Capsici ◽

Wide Range ◽

Extensive Growth

Abstract A description is provided for Colletotrichum capsici. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Capsicum annuum, C. frutescens, Aristolochia, Cicer, cotton, Eggplant, jute, tomato, turmeric and many others from a wide range of families. DISEASE: Dieback, stem break, anthracnose, leaf spot, seedling blight, fruit rot (dieback of young fruits and ripe rot). GEOGRAPHICAL DISTRIBUTION: Tropics and subtropics of Africa, Asia, America and Australasia; has been recorded occasionally in Southern Europe. TRANSMISSION: Seed-borne; persists in decayed fruits and other plant debris from which conidia are dispersed locally by water and air currents. No extensive growth in soil reported.

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