Browsing by Author "Bhanu, K.R.M."

Now showing 1 - 4 of 4
  • Thumbnail Image
    Item
  • Thumbnail Image
    Item
    Integrated Management of Major Coconut Pests Using Pheromone Lures
    (2012) Bhanu, K.R.M.; Jayanth, K.P.; Thomas Mathew, M.; Prabhakara, M.S.
    Red palm weevil Rhynchophorus ferrugineus Olivier(Coleoptera:Curculionidae; Rhinoceros beetle Oryctes rhinoceros Linn.(Coleoptera: Scarabidae) and Black headed caterpillar Opisina arenosella Walker (Lepidoptera: Oecophoridae) are the three among major insect pests of coconut in India.Grubs of Re d palm weevil(RPW) enter and complete their life cycle within the stem, killing the tree, adults of Rl1inoceros beetle (RB) feed on the growing point of the tree and cause yield loss and the larvae of black headed caterpillar scrape and feed on the green part of the coconut leaflets leading to burnt symptoms of the fronds, death of young trees and yield loss.Aggregation pheromones of RPW and RB are used for monitoring and mass trapping of RPW and RB to manage the pest under economic threshold level.During 2006-07 large scale field trials for RPW and RB were carried out in four different states in India by PCl under a partially funded Coconut Development Board(CDB) project using indigenously synthesized pheromone lures.It was demonstrated that the pheromone lures predominantly attracted virgin and gravid females of RP W and RB. Female sex pheromone of black headed caterpillar Opisina arenosella was also identified and developed in India by PCl,under a project partially funded by CDB; dispensers, dosage and traps were standardized under field conditions and further trials were also conducted in India.It was also established that pheromone lures can be used as a monitoring and a surveillance tool for understanding the pest status before the release parasitoids and natural enemies.
  • Thumbnail Image
    Item
    Monitoring Emergence Pattern of Coconut Black-Headed Caterpillar Opisinaarenosella Walker (Lepidoptera: Oecophoridae) Using Sex Pheromone Traps
    (2013) Bhanu, K.R.M.; Chandrasekharaiah, M.; Prabhakara, M.S.; Mallik, B.; Muralidharan, K.; Chakravarthy, A.K.
    The pheromone mass trapping programme for coconut black-headed caterpillar (BHC), Opisinaarenosella Walker under development at the south eastern dry zone of Karnataka calls for a proper monitoring system. Experiments conducted at Bidadi, Nelamangala, Nittur and Thyamagondlu near Bangalore, peninsular India to establish the emergence pattern of BHC indicated that nearly six emergence peaks of moths were recorded in 18 months. The duration of emergence and non-emergence periods of moths was approximately 41 days (SD= ±3.93) and 48 days (SD= ±4.35) respectively. The maximum number of days of moth and non-moth emergence was recorded during March, April and May. The studies on emergence pattern throughout the generation indicated that the moth emergence followed a normal curve. The moth emergence pattern of BHC in four coconut gardens at Nelamangala, Thyamagondlu, Nittur and Bidadi indicated the occurrence of spatially segregated moth emergence. The present studies provided thoughtful information on flight pattern of BHC in each generation and also throughout the year. Such basic results are helpful in designing pheromone based pest control strategies.
  • Thumbnail Image
    Item
    Pheromone technology: An ecofriendly approach for coconut pest management
    (2013-07) Bhanu, K.R.M.; Chandrasekharaiah