Articles
OBSERVATION OF PERSIMMON ANTHRACNOSE IN THE NATIONAL FIELD GENEBANK FOR PERSIMMON
Article number
833_16
Pages
109 – 112
Language
English
Abstract
Persimmon anthracnose is a disease commonly observed in persimmon fields in southern China in the past.
With the rapid development of the persimmon industry, anthracnose was more and more epidemic in all regions planting persimmon in China in recent years.
In order to guide persimmon growers to know the symptoms of anthracnose on persimmon trees well and preventing damage from it, the symptoms of anthracnose were surveyed in trees at different position over a period of 2-3 years in the National Field Genebank for Persimmon (NGPF). The result shows that susceptibility to the disease was correlated with different varieties; the well-known local cultivars Fuping Jianshi and Gongcheng Yueshi were easily infected and resulted in significant damage to tree vigor.
Persimmon anthracnose symptoms were easily found on new shoot and fruit, seldom on leaf.
New shoot was infected before its lignification, the disease first infects axil and bud base, the infection ceased when scarfskin of shoot turns brown.
But the spots on the infected shoots enlarged with shoot growing.
The symptoms of anthracnose also occur on the surface of persimmon fruit during the period of fruit enlargement to ripening.
Moreover, black spots were found on petioles and main leaf veins, and sepals.
Persimmon anthracnose occurs in a severe way in the high dense orchard, high dense shoots of a tree and in rainy environments rich of dew.
This suggests that removal of pruned shoots, fallen leaves, infected fruits and calyx from the persimmon field during autumn will aid in disease control by decreasing the primary infection source.
Improving orchard management by proper dense planting and pruning was also an efficient method of controlling disease infection.
Utilizing resistant cultivars is useful as a cultural control strategy.
With the rapid development of the persimmon industry, anthracnose was more and more epidemic in all regions planting persimmon in China in recent years.
In order to guide persimmon growers to know the symptoms of anthracnose on persimmon trees well and preventing damage from it, the symptoms of anthracnose were surveyed in trees at different position over a period of 2-3 years in the National Field Genebank for Persimmon (NGPF). The result shows that susceptibility to the disease was correlated with different varieties; the well-known local cultivars Fuping Jianshi and Gongcheng Yueshi were easily infected and resulted in significant damage to tree vigor.
Persimmon anthracnose symptoms were easily found on new shoot and fruit, seldom on leaf.
New shoot was infected before its lignification, the disease first infects axil and bud base, the infection ceased when scarfskin of shoot turns brown.
But the spots on the infected shoots enlarged with shoot growing.
The symptoms of anthracnose also occur on the surface of persimmon fruit during the period of fruit enlargement to ripening.
Moreover, black spots were found on petioles and main leaf veins, and sepals.
Persimmon anthracnose occurs in a severe way in the high dense orchard, high dense shoots of a tree and in rainy environments rich of dew.
This suggests that removal of pruned shoots, fallen leaves, infected fruits and calyx from the persimmon field during autumn will aid in disease control by decreasing the primary infection source.
Improving orchard management by proper dense planting and pruning was also an efficient method of controlling disease infection.
Utilizing resistant cultivars is useful as a cultural control strategy.
Publication
Authors
Y. Yang, R. Wang, G. Li, X. Ruan
Keywords
persimmon, anthracnose, observation, Colletotrichum gloeosporioides
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