AN OVERVIEW OF CONTROL STRATEGIES OF ECONOMICALLY IMPORTANT STINKBUGS (HETEROPTERA) AND TORTRICIDAE MOTHS OCCURRING ON LITCHIS IN SOUTH AFRICA

P.S. Schoeman
The coconut stinkbug Pseudotheraptus wayi (Hemiptera: Coreidae) was recorded for the first time during 2007 on litchis in South Africa. This polyphagous insect is widely distributed throughout southern and eastern Africa and affects a wide range of commercial host plants. They are selective feeders and will feed on a specific host plant for only a short period of time before moving on. In litchis, the damage varies significantly. In the Nelspruit area where a large number of alternative hosts occur, damage levels of up to ±70% have been recorded. In contrast in the Malalane area where very few commercial hosts are cultivated in close proximity to litchis, damage levels of lower than 5% have being recorded. Due to the short residual actions of many agrochemicals, the short periods between spray application and harvest, as well as a large reservoir of insects migrating between various host plants, it became clear that a well-coordinated area wide management program is probably the only suitable long term sustainable solution to the problem. The first phase of the project entailed a detailed population survey of heteropterans on all commercial crops. Major aspects currently under investigation include pheromone research, microbial control as well as studies relating to habitat management. Tortricidae moths are also important, not only due to the direct damage they cause (±5%) but also because they pose a very serious quarantine risk in fruit destined for export markets. In order to integrate insect management in litchis, it is important that environmentally sustainable methods of control be used against this group of insects as well.
Schoeman, P.S. (2014). AN OVERVIEW OF CONTROL STRATEGIES OF ECONOMICALLY IMPORTANT STINKBUGS (HETEROPTERA) AND TORTRICIDAE MOTHS OCCURRING ON LITCHIS IN SOUTH AFRICA. Acta Hortic. 1029, 401-408
DOI: 10.17660/ActaHortic.2014.1029.51
https://doi.org/10.17660/ActaHortic.2014.1029.51
Litchi chinensis Sonn., Coreidae, Pseudotheraptus wayi Brown, mating disruption, lychee, integrated pest management
English

Acta Horticulturae