Articles
FIELD REACTION TO ANTHRACNOSE CAUSED BY COLLETOTRICHUM SPP. ON PEPPER FRUITS
Article number
830_80
Pages
557 – 562
Language
English
Abstract
Anthracnose caused by Colletotrichum spp. was increasingly observed on pepper fruits in the experimental field of Institute of Genetics, Sofia, during the last several years.
In our investigation it was established that the population of Colletotrichum is heterogeneous and at least 3 species (C. acutatum, C. coccodes and C. gloeosporioides) could be associated with pepper anthracnose in Bulgaria C. capsici was not found.
The symptoms first appeared as small, watersoaked lesions that expanded rapidly.
Fully expanded lesions were usually round and sunken and ranged in color from dark red to tan to black.
Often multiple lesions formed on individual fruit.
The disease could also be introduced into a crop on infested seed.
During warm and wet periods, conidia were splashed by rain or irrigation water from diseased to healthy fruit.
Diseased fruit acted as a source of inoculum, allowing the disease to spread from plant to plant within the field.
A part of the existing at the Institute of Genetics pepper collection of Capsicum annuum cultivars and lines, C. baccatum var. pendulum accessions and interspecific hybrid progenies was evaluated for natural attack by Colletotrichum spp.
All studied C. baccatum var. pendulum accessions and most of C. annuum × C. frutescens hybrids showed high field resistance.
The most susceptible were the cultivars Pazardjishki edar, Mačvanka, C. annuum × C. chinense hybrids 85/8, 94/2 and 35/26 2.
In our investigation it was established that the population of Colletotrichum is heterogeneous and at least 3 species (C. acutatum, C. coccodes and C. gloeosporioides) could be associated with pepper anthracnose in Bulgaria C. capsici was not found.
The symptoms first appeared as small, watersoaked lesions that expanded rapidly.
Fully expanded lesions were usually round and sunken and ranged in color from dark red to tan to black.
Often multiple lesions formed on individual fruit.
The disease could also be introduced into a crop on infested seed.
During warm and wet periods, conidia were splashed by rain or irrigation water from diseased to healthy fruit.
Diseased fruit acted as a source of inoculum, allowing the disease to spread from plant to plant within the field.
A part of the existing at the Institute of Genetics pepper collection of Capsicum annuum cultivars and lines, C. baccatum var. pendulum accessions and interspecific hybrid progenies was evaluated for natural attack by Colletotrichum spp.
All studied C. baccatum var. pendulum accessions and most of C. annuum × C. frutescens hybrids showed high field resistance.
The most susceptible were the cultivars Pazardjishki edar, Mačvanka, C. annuum × C. chinense hybrids 85/8, 94/2 and 35/26 2.
Publication
Authors
R. Rodeva, Z. Stoyanova, R. Pandeva, N. Petrov
Keywords
Capsicum, Colletotrichum acutatum, Colletotrichum gloeosporioides, Colletotrichum coccodes, fruit disease, host resistance
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