Investigation of the effect of silica nanoparticles with the pathogenic fungus Beauveria bassiana on the greenhouse whitefly, Trialeurodes vaporariorum Westwood
Subject Areas : entomology and othea arthropods
SEYYED KAZEM
Vahedi
1
(Master , Department of Plant Protection, Islamic Azad University Mahabad Branch, Mahabad, Iran)
A.
Hoseinzadeh
2
(هیت علمی دانشگاه ازاد اسلامی واحد مهاباد)
Akbar
Ghassemi-Kahrizeh
3
(Mahabad Branch, Islamic Azad University)
Keywords:
Abstract :
Introduction: Greenhouse whitefly, as an economic pest, has a wide and ubiquitous host range and causes great damage to many crops, including greenhouse plants. Due to the morphological characteristics and potential of resistance to chemical toxins, it is necessary to find suitable and compatible compounds for integrated control of this pest by increasing the effect and minimizing the adverse effect on the pathogenic fungus Beauveria bassiana.Methods: In this study, the effect of pathogenic fungus Beauveria bassiana alone and in combination with silica nanoparticles against second instar seeds and nymphs of Trialeurodes vaporariorum Westwood and germination power of pathogenic fungi using probit analysis, one-way analysis of variance and ANOVA SPSS software was examined.Results: LC50 values obtained from probit degradation as a result of the effect of different concentrations of silica nanoparticles and Beauveria bassiana against eggs after 7 days and against second instar nymph after 72 hours (643.97 mg / L and 170399 conidia/ ml) and (602.952 mg / L and 78379 conidia/ ml) were obtained, respectively.Results: According to the results of the present study, silica nanoparticles alone have higher toxicity than other treatments and in combination with B. bassiana can be used in integrated control of the important greenhouse whitefly pest. The most important advantage of using these compounds is their compatibility with the environment and the lack of resistance to insects against them.
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