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David, H.
- Interaction between Entomopathogenic Nematodes and Granulosis Viruses of Chilo infuscatellus Snellen and Chilo sacchariphagus Indicus (Kapur)
Abstract Views :237 |
PDF Views:112
Authors
Affiliations
1 Maduranthakam Co-op, Sugar Mills Ltd., Padalam 603 308, Kancheepuram Dist., Tamil Nadu, IN
2 Section of Entomology, Sugarcane Breeding Institute, Coimbatore 641007, Tamil Nadu, IN
1 Maduranthakam Co-op, Sugar Mills Ltd., Padalam 603 308, Kancheepuram Dist., Tamil Nadu, IN
2 Section of Entomology, Sugarcane Breeding Institute, Coimbatore 641007, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 16, No 2 (2002), Pagination: 153-156Abstract
Steinernema feltiae Filipjev, S. glaseri Steiner and Heterorhabitis indica (Poinar, Karunakar, David) developed and reproduced in sugarcane shoot borer, Chilo infuscatellus Snellen and Chilo sacchariphagus indicus (Kapur) larvae infected with granuloviruses (GV). The mean percent infectivity of the three nematode species showed no significant difference among the diseased and healthy larvae of both shoot and internode borers. The multiplication of dauer juveniles was significantly higher in healthy larvae of C. infuscatellus and C. sacchariphagus indicus compared to GV infected larvae.Keywords
Granuloviruses, Heterorhabditis indica, Interactive Effects, Steinernema feltiae, S. glaseri.- Influence of Storage Temperature, Population Density and Duration of Storage on the Survival of Three Species of Entomopathogenic Nematodes
Abstract Views :199 |
PDF Views:133
Authors
Affiliations
1 Section of Entomology, Sugarcane Breeding Institute, Coimbatore 641007, Tamil Nadu, IN
1 Section of Entomology, Sugarcane Breeding Institute, Coimbatore 641007, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 15, No 2 (2001), Pagination: 183-188Abstract
Among the five different temperatures tested for storage of infective juveniles (Ijs). survival of Steinernema feltiae Filipjev and S. glaseri Steiner was higher at 7.5°C, while the survival of Heterorhabditis indica (Poinar, Karunakar and David) was higher at 10°C. All the three species of nematodes showed higher percentage of survival when stored at 250 IJs per ml compared to 500 and 1000 Us per ml. A negative correlation was observed between duration of storage and per cent survival in S. feltiae (r = -0.9831**). S. glaseri (r = -0.9847**) and H. indica (r = -0.9437**). Based on the results of the study, the best combination of temperature, population density and duration of storage for the entomopathogenic nematodes was 7.5°C, 250 IJs perml and 120 days, respectively for S. feltiae, 7.5°C, 250 IJs per ml and 90 days for S. glaseri and 10°C, 250 IJs per ml and 90 days for H. indica.Keywords
Heterorhabditis indica, Population Density, Steinernema feltiae, S. glaseri, Storage.- Influence of Temperature and Relative Humidity on the Growth, Sporulation and Pathogenicity of Beauverianrnr. bassiana
Abstract Views :215 |
PDF Views:143
Authors
Affiliations
1 Sugarcane Breeding Institute, Coimbatore 641 007, Tamil Nadu, IN
1 Sugarcane Breeding Institute, Coimbatore 641 007, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 12, No 1 (1998), Pagination: 71-75Abstract
Among the five different temperature conditions tested; radial growth, biomass production and sporulation were greater at 25°C foHowed by 30 and 20De. Similarly susceptibility of third instar shoot borer (Chilo infuscatellus Snellen) larvae to fungal infection was higher when the larvae were held at 25°C after treatment. Among the 5 relative humidity (RH) levels tested at 25°C, the radial growth of the fungus was maximum at 90 per cent RH, whereas biomass production and sporulation were greater at 100 per cent RH. Higher mortality of borer larvae occurred at 100 and 90 per cent RH levels and the susceptibility decreased as the RH increased.Keywords
Beauveria nr. bassiana, Chilo infuscatellus, Relative Humidity, Temperature.- Studies on the Spider Fauna of Sugarcane Ecosystem in Southern Peninsular India
Abstract Views :271 |
PDF Views:148
Authors
Affiliations
1 Division of Crop Protection, Sugarcane Breeding Institute, Coimbatore - 641 007, IN
1 Division of Crop Protection, Sugarcane Breeding Institute, Coimbatore - 641 007, IN
Source
Journal of Biological Control, Vol 8, No 2 (1994), Pagination: 85-93Abstract
Surveys conducted in three states of southern peninsular India revealed the occurrence of 57 species of spiders belonging to 13 families of Araneae in the sugarcane ecosystem. Of these, only two species viz., Hippasa greenalliae BlackwaH (Lycosidae) and Cyrtophora cicatrosa Stoliczka (Araneidae) were abundant, while six species were less abundant and 49 species were rare in occurrence. The spiders were found to colonize the sugarcane crop 40·45 days after planting. The population of the wolf spider H.greenalliae which comprised more than 70% of the total population increased with age of the crop upto 180 days. There was no significant variation in the population of H.greenalliae in sugarcane cropped field and adjacent fallow land. The orbweaver spider C.cicatrosa started colonizing the crop 100 days after planting of the crop and its population increased upto 240 days. Population of H.greenalliae and that of all the species had negative association with maximum temperature and rainfall and positive association with relative humidity. A reverse trend was noticed in C.cicatrosa. Soil and foliar application of insecticides recommended for the suppression of shoot borer, Chilo infuscatelius Snellen in the early stage of the crop growth did not exert any significant influence on the colonization of spiders. Among the five insecticides tested as foliar sprays at six month old crop, quinalphos, monocrotophos and endosulfan significantly reduced the spider population.Keywords
Sugarcane Ecosystem, Spiders, Hippasa greenalliae, Cyrtophora cicatrosa.- Relative Toxicity of Certain Insecticides To Adelencyrtus mayurai (Subba Rao), A Parasitoid of Sugarcane Scale Insect, Melanaspis glomerata (Green)
Abstract Views :298 |
PDF Views:129
Authors
Affiliations
1 Division of Crop Protection Sugarcane Breeding Institute, Coimbatore - 641 007, IN
1 Division of Crop Protection Sugarcane Breeding Institute, Coimbatore - 641 007, IN
Source
Journal of Biological Control, Vol 8, No 1 (1994), Pagination: 14-17Abstract
Toxicity of seven insecticides viz.,carbosulfan, dimethoate, malathion, monocrotophos, cypermethrin, decamethrin and fenvalerate each at three concentrations were tested for their relative toxicity to Adelencyrtus mayurai (Subba Rao), the principal parasitoid of sugarcane scale insect, Melanaspis glomerata (Green), by exposing the adults to the treated surface. At recommended concenrratfori, both fenvalerate (31.3% mortality) and deltamethrin (49.9%) proved to be less toxic to the adult parasitoids. Malathion caused 93.0 % mortality, while the other insecticides inflicted cent per cent mortality. The mortality increased with increase in the concentation of the insecticides and decreased with increase in time lag between treatment with insecticide and exposure of the parasitoid to the treated surface.Keywords
Adelencyrtus mayurai, Parasitoid, Melanaspis glomerata, Insecticide Susceptibility.- Biology of Heterorhabditis indicus Poinar, Karunakar & David, 1992
Abstract Views :218 |
PDF Views:111
Authors
Affiliations
1 Kallakurichi Co-op. Sugar Mills Ltd, Vadamathur Village, Kanji, IN
2 Sugarcane Breeding Institute, Coimbatore, 641 007, IN
3 University of California, Berkeley, California - 94720, US
1 Kallakurichi Co-op. Sugar Mills Ltd, Vadamathur Village, Kanji, IN
2 Sugarcane Breeding Institute, Coimbatore, 641 007, IN
3 University of California, Berkeley, California - 94720, US
Source
Journal of Biological Control, Vol 7, No 1 (1993), Pagination: 24-28Abstract
The life cycle of Heterorhabditis indicus Poinar, Karunakar & David, 1992 closely resembles that of other heterorhabditids. It has two cycles - a hermaphroditic cycle, one with an oviparous generation with a complete set of four juvenile stages and another amphimictic generation with four juvenile stages. These hermaphroditic and oviparous generations are completed in 11-12 days in Galleria mellonella (L.) (Gallerriidae:Lepldoptera)at 24°C.
Keywords
Heterornabditis indicus, Biology, Galleria mellonella.- Influence of Dosage of Steinernema carpocapsae (Weitser) S. glaseri Steiner and Heterorbabditis indicus (Poinar, Karuuakar and David) on Mortality of the Host and Multiplication of Infective Juveniles in Sugarcane Internode Borer,
Abstract Views :219 |
PDF Views:128
Authors
Affiliations
1 Sugarcane Breeding Institute, Coimbatore - 641 007, IN
1 Sugarcane Breeding Institute, Coimbatore - 641 007, IN
Source
Journal of Biological Control, Vol 6, No 1 (1992), Pagination: 26-28Abstract
Steinernema carpocapsae (Welser), S. glaseri (Steiner) and Heterorhabditis indicus (Polnar, Karunakar and David) at an Inoculum level of 40 infective juveniles (IJ) per Illrva caused 97.5 - 100 per cent mortality of Chilo Sacchariphagus indicus (Kapur) larvae and the morfality decreased with decrease in dosage levels. There was no significant difference in the mortality caused by the three species of nematodes. The multiplilcation of infective juveniles (IJ) per unit body weight of the host was higher in H. indicus than in S. capcapsae and S. glaseri. The dosage level of 20 IJ/larva yielded significantly high nematode multiplication in S. glaseri (37,335.8 IJ/larva) and H. indicus (2,10,283.3 IJ/larva) while S. carpocapsae multiplied to the maximum at a dosage of 10 IJ/larva (1,35,894.3 IJ).Keywords
Dosage-Mortality, Multiplication, Steinernema glaseri, S. carpocapsae, Heterorhabditis indicus, Chilo sacchariphagus indicus.- A Simplified Mass Culturing Technique for Sturmiopsis inferens Tns
Abstract Views :222 |
PDF Views:102
Authors
Affiliations
1 Sugarcane Breeding Institute, Coimbatore 641 007, IN
1 Sugarcane Breeding Institute, Coimbatore 641 007, IN
Source
Journal of Biological Control, Vol 3, No 1 (1989), Pagination: 1-3Abstract
Attempts were made to simplify the culturing technique of the Tachinid parasitold, Sturmiopsis inferens Tns. The results showed that removal of chorion ensheathing the parasltold maggots before inoculation on host larva did not increase the per cent parasitisation significantly and this time consuming step in the breeding technique may be dropped. Modified King's technique in which maggots are suspended in 0.15% agar agar and allowed to find the host larva on their own was as effective as that of hand inoculation of individual host larva with parasitic maggots (Scaramuzza's technique). Both these modifications in the breeding technique enabled mass production of the parasite at reasonabte cost.Keywords
Sturmiopsis inferens, Mass Culturing.- Pathogenicity and Host Range of Beauveria nr. bassiana, a Fungal Pathogen of Chilo infuscatellus Snellen
Abstract Views :202 |
PDF Views:113
Authors
Affiliations
1 Sugarcane Breeding Institute, Coimbatore - 641 007, IN
1 Sugarcane Breeding Institute, Coimbatore - 641 007, IN