Impact of the Defoliator Cleopus Japonicus (coleoptera: Curculionidae) on Buddleja Davidii in the Laboratory
نویسندگان
چکیده
Cleopus japonicus Wingelmüller (Coleoptera: Curculionidae) has been investigated as a potential biocontrol agent against Buddleja davidii Franchet (Buddlejaceae), an invasive weed of exotic and indigenous forests in New Zealand. The impact of feeding damage by C. japonicus, at densities of 0, 3, 10 or 20 larvae per plant (from 2nd instar), on the growth of buddleia plants was assessed in a quarantine laboratory. Matured larvae were replaced every 11 days until, after seven weeks, the effects of defoliation were assessed. Grazing damage increased with larval density and in the high density treatment (20 larvae per plant), 83% of expanded leaves had more than 50% of the leaf area grazed. One third of the plants in the high density treatment died, presumably as a result of grazing, whereas there was no mortality in the control and light grazing (3 larvae per plant) treatments. Grazing resulted in a significant reduction in main stem height, total stem and branch length, and dry weight of roots and shoots, primarily in the medium and high density treatments. The results suggest that, following permission to release and successful establishment, C. japonicus should successfully suppress buddleia growth.
منابع مشابه
Linarin Inhibits the Acetylcholinesterase Activity In-vitro and Ex-vivo
Linarin is a flavone glycoside in the plants Flos chrysanthemi indici, Buddleja officinalis, Cirsium setosum, Mentha arvensis and Buddleja davidii, and has been reported to possess analgesic, antipyretic, anti-inflammatory and neuroprotective activities. In this paper, linarin was investigated for its AChE inhibitory potential both in-vitro and ex-vivo. Ellman's colorimetric method was used for...
متن کاملImpact of Cultivation and Subsequent Burial on Cydia pomonella (Lepidoptera: Tortricidae) and Conotrachelus nenuphar (Coleoptera: Curculionidae)
We assessed the efficacy of cultivation as a potential management strategy for codling moth, Cydia pomonella L. (Lepidoptera: Tortricidae), and plum curculio, Conotrachelus nenuphar Herbst (Coleoptera: Curculionidae) in apple orchards. Cocooned codling moth pupae and thinning apples infested with plum curculio larvae were cultivated over in the field. Emergence, percent burial, damage to buried...
متن کاملLinarin Inhibits the Acetylcholinesterase Activity In-vitro and Ex-vivo
Linarin is a flavone glycoside in the plants Flos chrysanthemi indici, Buddleja officinalis, Cirsium setosum, Mentha arvensis and Buddleja davidii, and has been reported to possess analgesic, antipyretic, anti-inflammatory and neuroprotective activities. In this paper, linarin was investigated for its AChE inhibitory potential both in vitro and ex vivo. Ellman’s colorimetric method was used for...
متن کاملLinarin Inhibits the Acetylcholinesterase Activity In-vitro and Ex-vivo
Linarin is a flavone glycoside in the plants Flos chrysanthemi indici, Buddleja officinalis, Cirsium setosum, Mentha arvensis and Buddleja davidii, and has been reported to possess analgesic, antipyretic, anti-inflammatory and neuroprotective activities. In this paper, linarin was investigated for its AChE inhibitory potential both in vitro and ex vivo. Ellman’s colorimetric method was used for...
متن کامل