Study the synergistic effects of ecdysoids and diatomaceous earth on Metarhizium anisopliae for control of date horned beetle larvae, Oryctes elegans Prell. | ||
| مهار زیستی در گیاهپزشکی | ||
| Article 2, Volume 7, Issue 1 - Serial Number 13, September 2019, Pages 15-27 PDF (179.4 K) | ||
| Document Type: Research Paper | ||
| DOI: 10.22092/bcpp.2019.121144 | ||
| Authors | ||
| Masoud Latifian* ; Bahar Rad | ||
| Date Palm and Tropical Fruits Research Center, Horticulture Science Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Ahvaz, Iran | ||
| Abstract | ||
| The aim of this study was to evaluate toxic and synergistic effects of ecdysoids compounds and diatomaceous earth on their integrated control along with the entomopathogenic fungus, Metarhizium anisopliae on date palm horned beetle larvae. In this study, the evaluated ecdysoids were Atabron, Dimilinand Nimazol. The fungal mycelium growth and spore germination were evaluated to checking the consistency of the ecdysoids compounds by extract medium mixing method. Then, the toxicity of compounds individually and in conjunction with pathogen M. anisopliae was evaluated by bioassay method. Studies revealed that mycelial growth and spore germination of M. anisopliae occurre in all ecdysoids compounds. The highest compatible index was 76.89 for concentration of 500 microliters per liter of Nimazol extract and the lowest level consistent with the incorporation of Dimilin in 1000 microliters per liter concentration. The combination of ecdysoids compounds with fungal pathogen M. anisopliae had synergistic effect on larval developmental stage of date palm horned beetle. The synergistic effect of Nimazol was higher. The use of diatomaceous earth showed mortality of horned beetle larvae with average lethal concentration equal to 1269.7 mg per liter. It also has synergistic effects on toxicity of fungal pathogen M. anisopliae and anti-synthesis chitin componds. The most powerful synergistic effects were observed in terms of mixing 50 percent lethal concentrations of diatomaceous earth, Nimazole and M. anisopliae. | ||
| Keywords | ||
| Metarhizium anisopliae; ecdysoid; diatomaceous earth; compatibility; synergism | ||
| References | ||
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