African Entomology (2013) 21, 310-315

T. Fullard and M.P. Hill (2013)
Impact of insecticides on the reproductive potential of false codling moth, Thaumatotibia leucotreta (Meyrick, 1913) (Lepidoptera: Tortricidae)
African Entomology 21 (2), 310-315
Abstract: False codling moth, Thaumatotibia leucotreta (Meyrick, 1913) (Lepidoptera: Tortricidae), is an important pest on citrus in South Africa. Several new insecticides were screened for their potential negative impacts on T. leucotreta's reproduction through topical insecticide applications and detached fruit bioassays. Detached fruit bioassays showed that the registered standard concentration of Delegate^® 20 g/1001 and DPX-HGW86 35 ml/1001 caused females to oviposit significantly fewer eggs (P = 0.0016) than the controls. The same was found for the registered concentration of Coragen^®(P < 0.0001). Topical insecticide trials showed that only concentrations of Coragen^®, at the registered field rate and above had an effect on the moths' reproductive output (P <0.0001). Alsystin^® and Meothrin™, which were used as industry standards, did not negatively affect the reproductive output of the moths during topical or detached fruit bioassay trials. This study helps to better understand the importance of the application mode, i.e. directly on moths or fruit and implies secondary benefits to some insecticide applications.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Thaumatotibia leucotreta	Citrus (genus)	South Africa