Nematicidal activity of phytochemicals and their potential use for the control of Meloidogyne javanica infected eggplant
- PDF / 331,768 Bytes
- 10 Pages / 547.087 x 737.008 pts Page_size
- 3 Downloads / 192 Views
Nematicidal activity of phytochemicals and their potential use for the control of Meloidogyne javanica infected eggplant in the greenhouse Deiaa E. El-Habashy & Mona A. Abdel Rasoul & Samir A. M. Abdelgaleil
Accepted: 20 July 2020 # Koninklijke Nederlandse Planteziektenkundige Vereniging 2020
Abstract Nematicidal activities of 17 phytochemicals belonging to the monoterpene, sesquiterpene, phenylpropene and alkaloid classes were assessed in vitro and in pot experiments under greenhouse conditions. The results showed that, based on LC50 values, monoterpenes and phenylpropenes were more toxic than sesquiterpenes and alkaloids to second-stage juveniles (J2) of Meloidogyne javanica. α-Terpinene (LC50 = 36.22 mg/L) displayed the highest toxicity against juveniles, followed by α-pinene (LC50 = 47.49 mg/L), nerolidol (LC50 = 53.60 mg/L) and eugenol (LC50 = 73.45 mg/L). Furthermore, α-pinene, αterpinene and nerolidol were highly effective in reducing egg hatching of M. javanica after 7 days of treatment displaying IC50 values of 43.28, 49.26 and 50.39 mg/L, respectively. The three compounds showed nematicidal activity against eggs comparable to a reference nematicide, oxamyl. In pot experiment with eggplant, α-pinene, α-terpinene, eugenol and nerolidol induced remarkable reduction in number of galls, egg-masses
D. E. El-Habashy Department of Plant Pathology, Faculty of Agriculture, Damanhour University, Damanhour, Egypt M. A. Abdel Rasoul Department of Plant Protection, Faculty of Agriculture, Damanhour University, Damanhour, Egypt S. A. M. Abdelgaleil (*) Department of Pesticide Chemistry and Technology, Faculty of Agriculture, Alexandria University, El-Shatby, Alexandria 21545, Egypt e-mail: [email protected]
and eggs per plant, and number of second stage juveniles in soil at concentration of 500 mg/L. Also, these compounds increased the growth parameters of eggplant compared with infected control. α-Terpinene gave nematode control and plant growth similar to oxamyl. The results suggest that these four compounds could be applied for M. javanica management. Keywords Nematicidal activity . Natural products . Monoterpenes . Sesquiterpenes; Phenylpropenes . Alkaloids . Eggplant . Meloidogyne javanica
Introduction Plant parasitic nematodes are highly destructive plant pathogens globally. They attack a wide variety of economic crops and cause huge yield losses in agricultural production worldwide (Bird et al. 2009; Bernard et al. 2017). Among plant parasitic nematodes, Meloidogyne spp., the root-knot nematodes, are able to infect more than 2000 plants. Therefore, they are one of the most harmful genera on field and horticultural crops and cause approximately 5% of global crop loss (Asadi Sardari et al. 2015). It is estimated that, they cause world-wide annual losses of approximately US$ 157 billion (Singh et al., 2015). In Egypt, Meloidogyne javanica and M. incognita are among the most important economic pests of many field and vegetable crops (Ibrahim et al. 2010). The management of plant parasitic nematodes, inc
Data Loading...
