The aggregation rate was 33.3% and 75.0%, in the presence and absence of pheromone traps, respectively. Time required for taking-off from the release point was 5-20 min and 0.5-6 h in the presence and absence of pheromone traps, respectively. The percentages of tagged adults that dispersed more than 50 m were 50% and 8.3% in the presence and absence of pheromone traps, respectively. The mean distances females and males covered were 95.80 m and 42.40 m in the presence of pheromone traps and 32.47 m, 16.30 m in the absence of pheromone traps, respectively. The average flight of the RPW was 69.1 m (7.7-213 m) in the presence of pheromone traps and only 24.4 m (10-90 m) without pheromone traps. The flight behavior of the RPW adults was influenced by pheromone traps. Our results indicated that wild-caught adult RPW with attached dummy transmitters were able to fly normally, whereas laboratory-reared adults were unable to fly successfully with attached transmitters. Small radio transmitters (LB-2X, HOLOHIL) were glued on wild-caught adults and released in date palm orchard in late April and early May 2019. This study is the first to track individual adult RPW using radio telemetry in production date palm orchards. In this study, we tracked the movements and habitat preferences of RPW in date palm orchards in KSA using radio telemetry with and without the use of pheromone traps. Radio telemetry has provided beneficial knowledge on the movements, the habitat preference, and reproductive behaviors of numerous species of animals. The red palm weevil, Rhynchophorus ferrugineus (Olivier) (RPW) is a destructive insect pest of palm trees, destroying thousands of date palm trees in Kingdom of Saudi Arabia (KSA) and other countries. rhinoceros in the dead wood of the palm, Borassus flabellifer L. In addition, the Red Palm Weevil, Rhynchophorus ferrugineus (Oliver, 1790) (Curculionidae) is newly recorded as an associate of O. Peltophorum pterocarpum (DC.) Heyne (Fabaceae) is a new larval host plant for the beetle. monitoring of coconuts and other palms which have been planted in the park and removal of adult beetles etc) should be undertaken in case of any outbreak of the species in the park. The presence of the beetle in the Lat Krabang Park may indicate that mitigation control measures (e.g. Abstract: Observations on the biology and records of two larval host plants (one of which is new) for the tropical scarab beetle Oryctes rhinoceros (L., 1758) (Coleoptera: Scarabaeidae) in Lat Krabang Park, Bangkok, Thailand during October 2016 are provided therein. The Coconut Rhinoceros Beetle, Oryctes rhinoceros (L., 1758) (Coleoptera: Scarabaeidae: Dynastinae) in Lat Krabang Park, Bangkok, Thailand with notes on its biology and a new larval host plant.
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