Pathogenicity of Saudi Arabian fungal isolates against egg and larval stages of Rhynchophorus ferrugineus under laborato
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ORIGINAL RESEARCH ARTICLE
Pathogenicity of Saudi Arabian fungal isolates against egg and larval stages of Rhynchophorus ferrugineus under laboratory conditions Lamya Ahmed Al-Keridis 1 & Nevien M. Gaber 1,2 & Abdulrahman Saad Aldawood 3 Received: 24 December 2019 / Accepted: 24 March 2020 # African Association of Insect Scientists 2020
Abstract The pathogenicity of various local entomopathogenic fungal isolates from the kingdom of Saudi Arabia has been tested in the laboratory against the red palm weevil, Rhynchophorus ferrugineus Olivier (Coleoptera: Curculionidae). Fungi were coded, isolated, and purified. Beauveria bassiana (Balsamo-Crivelli) Vuillemin, coded as: BbSA-1 PDA-15 and Metarhizium anisopliae (Metsch.) Sorokin, coded as: MaSA-1 PDA-15, isolates demonstrated significant potential against R. ferrugineus larvae. A 1 × 1010 conidia/mL concentration of positive fungal isolates along with natural B. bassiana was used against different stages of R. ferrugineus. Rhynchophorus ferrugineus larvae were supplied with synthetic diets that contain preservatives and nonpreservatives. The fungal isolates BbSA-1 PDA-15 and MaSA-1 PDA-15 affected the egg hatchability and caused significant larval mortality of red palm weevil. It was shown that MaSA-1 PDA-15 is one of the most pathogenic fungi against R. ferrugineus larvae followed by BbSA-1 PDA-15 and Natural B. bassiana isolates. Therefore, these local fungal isolates have the potential to be used against R. ferrugineus. Further development in the research could facilitate the farmers to save their valuable palm trees from the notorious pest. Keywords Kingdom of Saudi Arabia . Fungus isolates . Pathogenicity . Red palm weevil
Introduction The date palm Phoenix dactylifera L., is a major fruit crop in most Arab countries, including the Kingdom of Saudi Arabia. It has traditionally been related to maintaining people’s lives and traditions as a major agricultural plant in the old world. Arab countries account for 70% of the world’s 120 million date palms and contribute up to 67% of global date production
* Abdulrahman Saad Aldawood [email protected] Lamya Ahmed Al-Keridis [email protected] Nevien M. Gaber [email protected] 1
Faculty of Science, Department of Biology, Princess Nourah Bint Abdulrahman University, Riyadh 11474, Saudi Arabia
2
Agricultural Research Center, Plant Protection Research Institute, Dokki, Giza 12311, Egypt
3
Economic Entomology Research Unit, Plant Protection Department, College of Food and Agriculture Sciences, King Saud University, Riyadh 11451, Saudi Arabia
(El-Juhany 2010). The date palm is one of the oldest cultivated plants with a high nutritional value and a long production period (100 years) (Riad 2006). The date palm is the main fruit crop in Saudi Arabia, with 23 million date palms covering about 72% of the cultivated land and being ranked third in the world in date fruit production (Erskine et al. 2004). The date palm is a multi-purpose tree that provides food, shelter and timber. The date fruit is a good source of fib
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