A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Radhakrishnan, B.
- Bio-Ecology of Three Aphidiid Parasitoids of Toxoptera aurantii (Boyer de Fonscolombe) Infesting Tea in South India
Authors
1 UPASI Tea Research Institute, Nirar Dam BPO, Valparai, 642 127, IN
Source
Journal of Biological Control, Vol 6, No 1 (1992), Pagination: 4-8Abstract
In the tea plantations of south India, Aphidius colemani Viereck, Lipolexis scutellaris Mackauer and Trioxys indicus Subba Rao and Sharma parasitise Toxoptera aurantii (Boyer de Fonscolombe). At 25±5 °C and 75±5 percent RH, developmental period of the parasitoids varied between I5 and 18 days. The three year study revealed that the percentage of parasitism was hlghest from January to March. High relative humidity adversely affected the numerical abundance of aphidiids.Keywords
Tea Aphid, Toxoptera aurantii, Aphidiids, Bioecology.- First Host Record for Dichrogaster fulvescens seminigra Townes (Hymenoptera: Ichneumonidae, Cryptinae), a Parasitoid of Mallada desjardinsi (Navas) (Neuroptera: Chrysopidae) Associated with Tea Ecosystem
Authors
1 Department of Entomology, UPASI Tea Research Foundation, Tea Research Institute, Valparai-642 127, Tamil Nadu, IN
2 Department of Zoology, University of Calicut, Malappuram–673 635, Kerala, IN
Source
Journal of Biological Control, Vol 29, No 4 (2015), Pagination: 179-182Abstract
The larva of green lacewing, Mallada desjardinsi (Navas) is an important predator of red spider mite (RSM) Oligonychus coffeae, infesting tea. Mallada desjardinsi is reported as potential biological control of RSM, but the report on its parasitoids is scarce. Here we report the parasitism of M. desjardinsi by a species of ichneumon wasp. Mallada desjardinsi is the first host report for Dichrogaster fulvescens seminigra Townes, a sub species of Dichrogaster fulvescens. Five field collected larvae of M. desjardinsi were being found to be parasitized by this parasitoid. Dichrogaster fulvescens emerged after 9.5 d of pupal period. A broader understanding of the tritrophic level interactions that encompasses parasitoid-predator can enhance our ability to design effective biological control strategies.
Keywords
Oligonychus coffeae, Predator, Parasitoid, Tea, Mallada desjardinsi.References
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- Biology and Feeding Efficacy of the Anthocorid, Blaptostethus pallescens Poppius on Oligonychus coffeae in Tea
Authors
1 Department of Entomology, UPASI Tea Research Foundation, Valparai, Coimbatore – 642 127, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 31, No 4 (2017), Pagination: 198-200Abstract
The anthocorid predator, Blaptostethus pallescens Poppius was studied for the first time on red spider mite (RSM), Oligonychus coffeae Nieter. Laboratory studies indicated that B. pallescens can be successfully reared on RSM. Incubation period was 4.4 ± 0.34 days. The total developmental period of five nymphal instars to adults was 17.1 ± 0.34 days. Blaptostethus pallescens nymphs consumed RSM in the range of 3.83 ± 0.18 to 17.37 ± 0.95/day. Female B. Pallescens consumed more mites than male. The study clearly showed B. pallescens is a promising candidate in tea plantations for the control of red spider mite.Keywords
Blaptostethus pallescens, Biology, Predator, Red Spider Mite, Tea.References
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- Taxonomy, Bionomics and Predatory Potential of Eocanthecona concinna (Walker) (Hemiptera: Pentatomidae: Asopinae)
Authors
1 UPASI Tea Research Foundation, Valparai, Coimbatore - 642127, Tamil Nadu, IN
2 National Bureau of Agricultural Insect Resources, Bangalore - 560024, Karnataka, IN
Source
Journal of Biological Control, Vol 32, No 2 (2018), Pagination: 81-86Abstract
Eocantheocna concinna (Walker) is recorded as an important predator of lepidopteran pests in tea plantations of South India. It is described for the first time based on male and female genitalia. Biology of this predator was studied on Corcyra cephalonica larvae. Egg incubation period was 14.3 ± 0.4 days. Five nymphal instars were developed in a period of 33–36 days. Feeding efficacy of different instars of E. concinna was evaluated on third instar tea looper, Biston suppressaria. Results showed fourth and fifth instars of E. concinna attacked faster on B. suppressaria. The study describes E. concinna as a potential predator of various lepidopteran pests in tea plantations and a promising candidate for biological control of looper pests.Keywords
Biology, Predatory Stink Bug, Predatory Efficiency, Lepidopteran Pests, Taxonomy.References
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