Browsing Faculty of Natural and Agricultural Sciences by Author "b4d61698-077b-4930-811c-f2954547902c"
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Biology and performance of two indigenous larval parasitoids on Tuta absoluta (Lepidoptera: Gelechiidae) in Sudan
Idriss, G.E.A.; Du Plessis, H.; Mohamed, S.A.; Khamis, F.; Ekesi, S. (Taylor & Francis, 2018)Tuta absoluta is an alien invasive pest in Sudan. Since it was detected in the country, the pest continues to cause major tomato losses. Alarmed by its devastating nature and the speed of spread, tomato growers resorted ... -
The effect of temperature on the development and reproduction of Busseola fusca (Lepidoptera: Noctuidae)
Glatz, J.; Du Plessis, H.; Van den Berg, J. (Cambridge Univ Press, 2017)The effect of temperature on the reproduction and development of Busseola fusca was studied under laboratory conditions. Single male–female pairs were confined to oviposition chambers kept at 15, 20, 26 and 30 ± 1°C and a ... -
Effects of Entomopathogenic fungi and Bacillus thuringiensis‐based biopesticides on Spoladea recurvalis (Lepidoptera: Crambidae)
Opisa, S.; Du Plessis, H.; Akutse, K.S.; Fiaboe, K.K.M.; Ekesi, S. (Wiley, 2018)Spoladea recurvalis (Fabricius) is one of the most devastating pests of amaranths caus- ing severe yield losses of 60%–100% to the crop. Unfortunately use of chemical pes- ticides is the most common control strategy that ... -
Efficacy of Bacillus thuringiensis sprays and cotton cultivars expressing cry proteins in the control of Earias biplaga (Walker) (Lepidoptera: Noctuidae)
Fourie, D.; Van den Berg, J.; Du Plessis, H. (BioOne, 2017)Earias biplaga (Walker) (Lepidoptera: Noctuidae) forms part of the bollworm pest complex of cotton in South Africa. Genetically modified Bt cotton that expresses Cry insecticidal proteins successfully controls the bollworm ... -
Evaluation of the susceptibility status of spiny bollworm Earias biplaga (Walker) (Lepidoptera: Noctuidae) to Bt cotton in South Africa
Fourie, D.; Van den Berg, J.; Du Plessis, H. (Entomological Society of Southern Africa, 2017)The bollworm complex of cotton in South Africa consists of the African bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), red bollworm, Diparopsis castanea (Hamps.) (Lepidoptera: Noctuidae), and the spiny ... -
Flight activity of the groundnut leafminer (Aproaerema modicella Deventer) (Lepidoptera: Gelechiidae) in the groundnut production areas of South Africa
Du Plessis, H. (Taylor & Francis, 2011)The groundnut leafminer (GLM), Aproaerema modicella (Deventer) is a pest of groundnut and soybean and also attacks lucerne. No information exists on the flight patterns of this invasive species that established in the ... -
The oxygen consumption rate of three lepidopteran maize pest species measured by a Clark polarographic oxygen electrode using an air-to-water respirometer chamber of novel design - short communication
Van Aardt, W.J.; Du Plessis, H. (ESSA, 2018)In the past, traditional oxygen consumption mea - surements on air-breathers have been made by means of chemical (Winkler titration) (Winkler 1888), physical (Cartesian divers) (Howard et al . 1965) ... -
The potential effect of Bt maize on Chrysoperla pudica (Neuroptera: Chrysopidae)
Van den Berg, J.; Warren, J.F.; Du Plessis, H. (Oxford Univ Press, 2017)Previous studies into third trophic level exposure of Chrysoperla spp. (Neuroptera: Chrysopidae) to Cry1Ab proteins produced by Bt crops yielded contradicting results. These contradictions were largely ascribed to differences ... -
Resistance status of Busseola fusca (Lepidoptera: Noctuidae) populations to single- and stacked-gene Bt maize in South Africa
Strydom, E.; Du Plessis, H.; Van den Berg, J.; Erasmus, A. (Oxford Univ Press, 2019)Transgenic Bt maize expressing Cry insecticidal δ-endotoxins of Bacillus thuringiensis has been cultivated in South Africa for the control of Busseola fusca since 1998. Busseola fusca is resistant to Cry1Ab Bt maize at ...