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Ramesh Babu, S.
- Cotesia ruficrus (Haliday, 1834) (Hymenoptera: Braconidae) Emerging as a Common Natural Parasitoid of Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) in Indian Maize Fields
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PDF Views:243
Authors
Affiliations
1 ICAR-National Bureau of Agricultural Insect Resources, H. A. Farm Post, Bellary Road, Hebbal, Bengaluru – 560024, Karnataka, IN
2 Agricultural Research Station, MPUAT, Borwat Farm, Banswara – 327001, Rajasthan, IN
1 ICAR-National Bureau of Agricultural Insect Resources, H. A. Farm Post, Bellary Road, Hebbal, Bengaluru – 560024, Karnataka, IN
2 Agricultural Research Station, MPUAT, Borwat Farm, Banswara – 327001, Rajasthan, IN
Source
Journal of Biological Control, Vol 33, No 3 (2019), Pagination: 193-196Abstract
Field surveys conducted during 2018-2019 in the maize fields infested with Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) in Karnataka, Tamil Nadu, Rajasthan and Meghalaya revealed that Cotesia ruficrus (Haliday) (Hymenoptera: Braconidae) was the common gregarious larval parasitoid in the maize fields parasitizing S. frugiperda. This is the first report of C. ruficrus parasitizing S. frugiperda in India, earlier reports being from Trinidad and Tobago. The present study (using integrated approach) provides morphological and molecular identification details along with host data, cocoon characters and geographical distribution of C. ruficrus.
Keywords
Fall Army Worm, Larval Parasitoid.Full Text
References
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- Report of a Mermithid Nematode Infecting Amyna axis, Chrysodeixisspp. and Spodoptera Spp. from India
Abstract Views :279 |
PDF Views:115
Authors
Affiliations
1 Agriculture Research Station, Maharana Pratap University of Agriculture and Technology, Banswara - 327001, Rajasthan, IN
2 Division of Nematology, ICAR-Indian Agricultural Research Institute, PUSA Campus, New Delhi - 110012, IN
1 Agriculture Research Station, Maharana Pratap University of Agriculture and Technology, Banswara - 327001, Rajasthan, IN
2 Division of Nematology, ICAR-Indian Agricultural Research Institute, PUSA Campus, New Delhi - 110012, IN
Source
Journal of Biological Control, Vol 33, No 3 (2019), Pagination: 217-221Abstract
Amyna axis (Lepidoptera: Erebidae), Chrysodeixis spp. (C. acuta and C. eriosoma) and Spodoptera spp. (S. exigua and S. litura) (Lepidoptera: Noctuidae) are important polyphagous insect-pests of leguminous crops. A mermithid (Nematoda: Mermithidae) nematode was found parasitizing the larval stages of these insects in the western Indian state of Rajasthan. Morphological and molecular analysis suggests that the nematode might be a species of the genus Hexamermis. The average length of post-parasitic nematode juveniles was 15 cm, and the average greatest body width was 1.5 mm. The vulva was median (V% = 48) without vulval flap. Approximately 100-125 μm long caudal appendages were present on tail. The cross-section revealed the presence of six hypodermal chords at the mid body region, and stichosome was present. The 18S rDNA sequence showed 99% similarity to mermithid nematode. A phylogenetic analysis of 18S rDNA sequences of mermithids resulted in identification of a new clade “Lineage 3” which included representatives of Mermis sp., Isomermis sp., Limnomermis sp., and Pheromermis sp. This is the first report of natural mermithid parasitism of A. axis and Chrysodeixis spp. along with its molecular characterization.
Keywords
Amyna Axis, Chrysodeixis, Hexamermis, Mermithid, Soybean, SpodopteraFull Text
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