TRAP CROP MANAGEMENT STRATEGIES TO MONITOR STINK BUG IN LITCHI ORCHARDS WITH EMPHASIS ON PSEUDOTHERAPTUS WAYI (HEMIPTERA: COREIDAE) AND BATHYCOELIA NATALICOLA (HEMIPTERA: PENTATOMIDAE)
The coconut stink bug Pseudotheraptus wayi (Hemiptera: Coreidae) is increasingly becoming a major problem in the subtropical growing regions of South Africa. This is because it has a wide host range of commercial plants. The widespread use of insecticides to control these pests has created several repercussion pests. Therefore, this research focuses on monitoring for early detection of this pest. Litchis have been found to be a good host for the coconut stink bug. Trap cropping is the traditional tool that has been used for pest management in several cropping systems and usage of this method has increased considerably in recent years. Inherent characteristics of a trap crops include not only natural differential attractiveness for oviposition and feeding, but also other attributes that enable the trap crop to serve as a sink for insects or the pathogens they vector. After fruit set in early September when litchi fruit become more abundant, the coconut bug is the most abundant sap sucking insect in most litchi orchards. Thereafter, it is suspected that the bugs migrate to other subtropical crops. Indiscriminate pesticide usage poses a direct threat to farm workers and as such it compromises compliance to Integrated Pest Management principles. The cost of pesticides and increased potential of resistance of stink bugs to chemical sprays makes it necessary to explore alternative control methods. This study aims to provide growers with practical alternatives to current monitoring techniques which in turn will ease production cost and increase sustainability. Various trap crops were rated for their attractiveness to stink bugs. Plantings of potential trap crops were established in small plots adjacent to the subtropical orchards using standard agronomic practices. The host status of each alternative crop is discussed.
Radzilani, T., Schoeman , P.S., Botha, B. and de Lange, H.C. (2014). TRAP CROP MANAGEMENT STRATEGIES TO MONITOR STINK BUG IN LITCHI ORCHARDS WITH EMPHASIS ON PSEUDOTHERAPTUS WAYI (HEMIPTERA: COREIDAE) AND BATHYCOELIA NATALICOLA (HEMIPTERA: PENTATOMIDAE). Acta Hortic. 1029, 433-438
stinkbug, trap cropping, pesticides, oviposition, pest management, monitoring, litchi