Tropical soil microflora of spice-based cropping systems as potential antagonists of root-knot nematodes

被引:45
作者
Eapen, SJ [1 ]
Beena, B [1 ]
Ramana, KV [1 ]
机构
[1] Indian Inst Spices Re, Div Crop Protect, Calicut 673012, Kerala, India
关键词
biological control; bioassay; hatching suppression; microflora; Meloidogyne incognita; parasitism; plant parasitic nematodes;
D O I
10.1016/j.jip.2005.01.011
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Suppression of plant parasitic nematodes with nematode predators, parasites or antagonists is an eco-friendly approach than the toxic chemicals. In a study, soil borne fungi from the rhizosphere of major spice crops were collected from diverse cropping systems prevailing in three southern states of India. A series of in vitro studies were conducted using 73 freshly collected fungal isolates and 76 isolates obtained from other sources. Out of this 67 isolates were not parasitic on females of root-knot nematodes whereas 115 isolates, though colonized the egg masses, did not show any signs of parasitism on nematode eggs. Fifty-nine isolates showed 50-90% inhibition in egg hatch. Pochonia chlamydospora, Verticillium lecanii, Paecilomyces lilacinus, and few isolates of Trichoderma spp. showed > 25% parasitism on root-knot nematode eggs. The most promising isolates in this study were one isolate each of Aspergillus (F.45), Fusarium (F.47), and Penicillium (F.59); three each isolates of Trichoderma (F.3, F.52, and F.60) and Pochonia (F.30 and Vc.3) Verticillium (VI); and two isolates of fungi that could not be identified (F.28 and F.62). Parasitism by Aspergillus tamarii, Aspergillus ustus, Drechslera sp., Humicola sp., and Scopulariopsis sp. on root-knot nematode eggs or females, reported in the present study, are new reports. (c) 2005 Elsevier Inc. All rights reserved.
引用
收藏
页码:218 / 225
页数:8
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