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Singaravelu, B.
- Penetration and Pathogenicity of Entomopathogenic Nematodes to Sugarcane Early Shoot Borer, Chilo infuscatellus Snellen (Lepidoptera: Crambidae)
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1 Division of Crop Protection, Sugarcane Breeding Institute, Coimbatore 641 007, Tamil Nadu, IN
1 Division of Crop Protection, Sugarcane Breeding Institute, Coimbatore 641 007, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 25, No 1 (2011), Pagination: 1-4Abstract
Penetration and pathogenicity of seven species of entomopathogenic nematodes (EPN), viz., Heterorhabditis indica (LN2), H. bacteriophora (LN8), Heterorhabditis sp. (HII), Steinernema carpocapsae, S. glaseri, S. riobrave and S. feltiae to sugarcane early shoot borer, Chilo infuscatellus Snellen, was studied under laboratory conditions with bioassay techniques. Significant differences were observed in mean penetration of the EPNs in C. infuscatellus larvae. The penetration rate recorded was highest in S. glaseri followed by S. carpocapsae (29 and 18% respectively), while it was lowest in the three species of heterorhabditids, Heterorhabditis sp. (HII), H. indica (LN2) and H. bacteriophora (LN8). In pathogenicity studies, mortality of the early shoot borer larvae increased with increase in dosage. The larval mortality was 83.3 per cent at the dose of 50 infective juveniles (IJs) of H. indica and S. glaseri. It was least at 10 IJs/larva of all EPNs tested. The LD50 values showed that S. glaseri was superior to all other EPN species (24.2 IJs/larva) followed by S. feltiae (26.6 IJs/larva).Keywords
Chilo infuscatellus, Early Shoot Borer, Entomopathogenic Nematodes, Heterorhabditis, Steinernema, Sugarcane.Full Text
References
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- Pathogenicity of Entomopathogenic Nematodes to Sugarcane Internode Borer, Chilo sacchariphagus indicus Kapur (Lepidoptera: Crambidae)
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Authors
Affiliations
1 Division of Crop Protection, Sugarcane Breeding Institute, Coimbatore - 641 007, Tamil Nadu, IN
1 Division of Crop Protection, Sugarcane Breeding Institute, Coimbatore - 641 007, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 22, No 1 (2008), Pagination: 1-5Abstract
The penetration and pathogenicity of five species of entomopathogenic nematodes (EPN), viz., Heterorhabditis indica (isolate LN2), H. bacleriophora, Steinernema giaseri, S. riobrare and S. feltiae to the sugarcane internode borer (INB), Chilo sacchariphagus inilicus (Kapur), were studied under laboratory conditions. Significant differences were observed among mean penetration of the EPNs. The highest penetration (42.2%) was observed for the steinerncmatids, S. glaseri and S. riobrave (28.3%) and the lowest penetration for the two heterorhabditids. H. indica (5.5%) and H. bacteriophora (5.2%). In pathogenicity studies, mortality of the INB increased with increase in dosage. The borer suffered 100 per cent mortality with 40 and 50IJs of H. indica and with 50IJs larva−1 of S. glaseri. The lowest mortality (10 to 26.6%) of INB was observed at a dosage of 10IJs larva−1 of all EPNs. H. indica was found to be superior among all EPN species with an LD50 of I4.7IJs larva−1. The LD50 values for other EPNs were 17.9IJs larva−1 for S. glaseri, 24.4IJs larva−1 for H. bacteriophora, 27.5IJs larva−1 for S. riobrave and 33.1IJs larva−1 for S. feltiae.Keywords
Chilo sacchariphagus indicus, Entomopathogenic Nematodes, Haterorhabditis steinernema, Sugarcane Internode Borer.Full Text
- A New Record of Granulovirus on Sugarcane Top Borer, Scirpophaga excerptalis Walker (Lepidoptera:Pyralidae)
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Authors
Affiliations
1 Section of Entomology, Sugarcane Breeding Institute, Coimbatore 641 007, Tamil Nadu, IN
1 Section of Entomology, Sugarcane Breeding Institute, Coimbatore 641 007, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 13, No 1&2 (1999), Pagination: 133-135Abstract
A granulovirus was found to infect sugarcane top borer, Scirpophaga excerptalis Walker for the first time. In a preliminary study, the virus infection in field population was found to vary from 1.6 to 14.4 (̅X = 5.8) percent. In the laboratory test, the virus caused mortality of final instar larvae up to 55.2 percent in 4 to 8 days after infection.Keywords
Baculovirus, Granulovirus, Natural Infection, Pathogenicity, Sugarcane Top Borer.Full Text
- Web mite Schizotetranychus krungthepensis on sugarcane in India: molecular evidence for occurrence and the way forward
Abstract Views :149 |
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Authors
Affiliations
1 Section of Entomology, ICAR-Sugarcane Breeding Institute, Coimbatore 641 007, India, IN
2 Section of Biotechnology, ICAR-Sugarcane Breeding Institute, Coimbatore 641 007, India, IN
3 Section of Physiology, ICAR-Sugarcane Breeding Institute, Coimbatore 641 007, India, IN
1 Section of Entomology, ICAR-Sugarcane Breeding Institute, Coimbatore 641 007, India, IN
2 Section of Biotechnology, ICAR-Sugarcane Breeding Institute, Coimbatore 641 007, India, IN
3 Section of Physiology, ICAR-Sugarcane Breeding Institute, Coimbatore 641 007, India, IN
Source
Current Science, Vol 123, No 8 (2022), Pagination: 1038-1049Abstract
Following the detection of an incongruity in the nomenclature of sugarcane web mite Schizotetranychus andropogoni (Hirst) (Acari: Tetranychidae), we collected web mite samples from commercial hybrids of sugarcane and Saccharum spontaneum in parts of Tamil Nadu and Kerala States, India. Acarologists identified these samples as Schizotetranychus krungthepensis Naing & Auger (Acari: Tetranychidae), originally described from Thailand in 2014. To provide molecular evidence to distinguish S. krungthepensis from S. andropogoni, we subjected sequences of 5.8S rRNA and mitochondrial cytochrome oxidase I (mtCOI) genes of both species available in NCBI database to Molecular Evolutionary Genetics Analysis (MEGA6). The analysis produced phylogenetic trees with distinct clusters for S. andropogoni and S. krungthepensis, albeit with some exceptions, thus providing evidence to consider S. krungthepensis a species distinctly different from S. andropogoni. In view of the possible threat of S. krungthepensis to sugarcane cultivation in the country, we outline the basic course of action needed to manage the pest if it were to assume more serious proportions than the native species it appears to be displacingFull Text
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