Effect of two protein elicitors extracted from Alternaria tenuissima and Beauveria bassiana against rice leaf folder (Marasmia exigua)

• Published in: Journal of King Saud University. Science 2021-12, Vol.33 (8), p.101652, Article 101652
• Main Authors: Basit, Abdul, Farhan, Muhammad, Essa, Muhammad, Abbas, Mureed, Wang, Yong, Zhao, De-Gang, Maridha, Amin U., Amjad Bashir, Muhammad, Hussain, Arif, Hanan, Abdul, Alajmi, Reem A., Al Eshram, Saedd, Hargis, Billy M.
• Format: Article
• Language: English
• Subjects: Plants resistance; Protein elicitors; Rice leaf folder; Signalling pathway
• ISSN: 1018-3647
• DOI: 10.1016/j.jksus.2021.101652

The rice leaf folder, Marasmia exigua (Butler), is dangerous pests and negatively affecting the rice production worldwide. Protein elicitors are considered to be bio-factors that induce rice resistance against herbivores. The present study was performed with two protein elicitors, Hrip 1 (extracted from Alternaria tenuissima) and PebB1 (from Beauveria bassiana) to study their efficacy against the rice leaf folder. Three different concentrations of Hrip 1 (68.88, 46.69 and 28.44 µg/ml) and PebB1 (56.66, 39.76 and 32.62 µg/ml) were assigned to evaluate the developmental time, survival rate, and fecundity of M. exigua. Both elicitors were applied to the three-leaf stage of the rice plant where newly emerged adult insects were released. Bioassay results showed that after the application of protein elicitors, the life cycle and survival rate of the rice leaf folder were prolonged, while fecundity decreased. The concentration of protein had a significant (p