
Isolation and identification of the pathogens causing peanut pod rot in Henan Province
Wan-wan FAN, Shao-jian LI, Su-ling SANG, Hai-yan ZHANG, Meng GAO, Zhen-yu WANG
CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2024, Vol. 46 ›› Issue (2) : 377-384.
Isolation and identification of the pathogens causing peanut pod rot in Henan Province
To identify the pathogens responsible for peanut pod rot in Henan Province, 92 samples of peanut pod rot were collected from various geographic regions and subjected to tissue isolation techniques. Pathogens were identified based on their morphological and molecular biological, and verified using Koch's rules. The results revealed that Fusarium, Aspergillus niger, Aspergillus flavus, Lasiodiplodia theobromae, Sclerotium rolfsii and Neocosmospora vasinfecta were the pathogenic fungi causing peanut pod rot in Henan Province, with Fusarium as the dominant genus. The main Fusarium species identified in this study were F. oxysporum, F. solani, F. proliferatum and F. chlamydosporum, with F. oxysporum and F. solani being the predominant species. This study further confirms that peanut pod rot is caused by multiple pathogens, providing a foundation for controlling this disease in Henan Province.
peanut pod rot / pathogens / Fusarium / Aspergillus / multiple infection {{custom_keyword}} /
Table1 Isolation of fungi from peanut pod rot samples表1 花生果腐病病样中各类真菌的分离情况 |
序号 No. | 属 Genus | 分离菌株数 No. of isolates | 分离频率 Isolation frequency /% |
---|---|---|---|
1 | 镰刀菌属Fusarium | 454 | 63.94 |
2 | 曲霉属Aspergillus | 112 | 14.36 |
3 | 小核菌属Sclerotium | 39 | 5.49 |
4 | 色二孢属Lasiodiplodia | 32 | 4.51 |
5 | 新赤壳属Neocosmospora | 6 | 0.85 |
6 | 炭疽菌属Colletotrichum | 39 | 5.49 |
7 | 木霉属Trichoderma | 11 | 1.55 |
8 | 毛壳菌属Chaetomium | 9 | 1.27 |
9 | 青霉菌属Penicillium | 4 | 0.56 |
10 | 链格孢属Alternaria | 7 | 0.99 |
11 | 壳囊孢属Cytospora | 4 | 0.56 |
12 | 匍枝霉属Cladobofryum | 2 | 0.28 |
13 | 枝孢属Cladosporium | 1 | 0.14 |
Fig. 1 The result of pathogenicity identification图1 致病性测定结果 |
Fig. 2 Morphological characteristics of the representative isolates of the five types pathogenic fungus and symptoms of peanut pods 30d after inoculated图2 5类病原真菌代表菌株的形态特征及接种30天致病症状 |
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