Development of Clitoria ternatea as a biopesticide for cotton pest management: assessment of product effect on Helicoverpa spp. and their natural enemies

Abstract

The Australian cotton industry is now dominated by transgenic (Bt) varieties, which provide a strong platform for integrated pest management (IPM) of Helicoverpa spp. (Lepidoptera: Noctuidae). New IPM‐compatible tools are required to manage the development of resistance in Helicoverpa spp. and the control of other sucking pests. A 10‐year study commenced in 2001 to identify short‐range, non‐volatile compounds on organ surfaces of plants that deter feeding or oviposition, or are toxic and do not support development of Helicoverpa spp. on cotton plants. The results of the initial study identified Clitoria ternateaL. (Fabaceae) as non‐preferred for Helicoverpa spp. oviposition and larval feeding. The study found that C. ternatea fractionalized extract mixture (fractions 2, 3, 4, and 6) caused oviposition and feeding deterrence as well as direct toxicity to Helicoverpa spp. This study has developed an oil‐based semiochemical product from C. ternatea identified in the initial study into a potential commercial product. The application of 1–2% (vol/vol) of the oil‐based formulation of the C. ternatea mixture against Helicoverpa spp. on commercial transgenic and conventional cotton crops resulted in Helicoverpa spp. oviposition and larval feeding deterrence, as well as caused direct mortality to larvae. No negative effect on beneficial insects was observed. In conclusion, the ability of the oil‐based C. ternatea mixture to control Helicoverpa spp. infestations, while conserving beneficial insect populations, suggests its potential for use in supplementing IPM programs to reduce the use of synthetic insecticides on transgenic and conventional cotton crops.

Butterfly Pea (Clitoria ternatea), a Cyclotide-Bearing Plant With Applications in Agriculture and Medicine

“…Expanding on the initial findings of Poth et al (2011a), additional studies have reported pesticidal activities of cyclotide extracts from C. ternatea (Gilding et al, 2015; Mensah et al, 2015) (Table 5). Gilding et al (2015) showed that C. ternatea extracts permeabilized insect-like membrane lipids, with the shoot extracts exhibiting the greatest potency (0.31 μg/mL LC 50 ).…”

“…Another study reported that application of oil-based C. ternatea mixture (1–2% v/v) to transgenic and conventional cotton crops, resulted in Helicoverpa spp. larval mortality and reduced oviposition and larval feeding (Mensah et al, 2015). Detrimental effects of the extract against beneficial insects were not observed (Mensah et al, 2015), suggesting that C. ternatea extracts could provide the basis for eco-friendly natural insecticides.…”

Keragaman Fenotipik Bunga Telang Double Petal Asal Indonesia dan Thailand Berdasarkan Morfologi Bunga

“…Hal ini karena adanya kandungan antosianin yang menghasilkan warna biru (Suebkhampet & Sotthibandhu, 2012). Selain itu, tanaman ini juga dimanfaatkan sebagai pakan ternak (Sutedi, 2013;Morsy & Awadalla, 2017) dan fungisida (Mensah, Leach, Young, Watts, & Glennie, 2015;Suganda & Adhi, 2017). Oleh karena itu, tanaman bunga telang memiliki potensi untuk dikembangkan.…”

Repenser la gestion des ravageurs du cotonnier en Afrique de l’Ouest

“…En Australie, un produit à base d'huile de Clitoria ternatea (Fabaceae) est utilisé pour son effet dissuasif sur l'oviposition et l'alimentation des larves d'Helicoverpa spp. (Mensah et al, 2015). L'utilisation de médiateurs chimiques ou substances sémiochimiques régissant les relations plantes-insectes constitue une voie en plein essor.…”