Diversity of entomopathogenic fungi associated with Mediterranean fruit fly (Ceratitis capitata (Diptera: Tephritidae)) in Moroccan Argan forests and nearby area: impact of soil factors on their distribution.

IF 2.2 2区 环境科学与生态学 Q1 Agricultural and Biological Sciences BMC Ecology Pub Date : 2020-11-24 DOI:10.1186/s12898-020-00334-2
Ayoub Hallouti, Mohamed Ait Hamza, Abdelaziz Zahidi, Rachid Ait Hammou, Rachid Bouharroud, Abdellah Ait Ben Aoumar, Hassan Boubaker
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Abstract

Background: Studying the ecology of biocontrol-agents is a prerequisite to effectively control medfly (Ceratitis capitata (Diptera: Tephritidae)) with entomopathogenic fungi. In this context, factors affecting the occurrence and distribution of medfly-associated entomopathogenic-fungi were studied. Soil samples (22) were collected from natural and cultivated areas of Souss-region Morocco.

Results: A total of 260 fungal isolates belonging to 22 species and 10 genera were obtained by using medfly pupae as bait. Medfly-associated fungi were detected in all studied soils and pupae infection percentages ranged from 3.33% to 48%. Two genera, Fusarium and Beauveria were the most frequent with 83 isolates (32%) and 50 isolates (19.23%) respectively. Pathogenicity test of isolated species against medfly pupae showed high mortality rates up to 91% for some strains. Principal component analysis (PCA) demonstrated a strong influence of origin, physical, and chemical properties of soil on the abundance of these fungi. In general, medfly-associated fungi were more abundant in soils with moderate pH (7.5 to 8) having high sand and organic content. High relative humidity negatively influenced the abundance of these fungi. Both factors directly affected the fungal infection percentages in pupae. The response of fungi to these parameters varied among species. According to principal component analysis (PCA), the soils of argan fields and forests were more suitable for the development of medfly-associated fungi than citrus orchards.

Conclusions: These results guide identifying suitable soils for the effective application of entomopathogenic fungi as biological control agents. In summary, isolated indigenous strains seem to be a promising option to control C. capitata.

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摩洛哥阿甘森林及附近地区与地中海果蝇(Ceratitis capitata (Diptera: Tephritidae))相关的昆虫病原真菌的多样性:土壤因素对其分布的影响。
背景:研究生物控制剂的生态学是利用昆虫病原真菌有效控制褐飞虱(Ceratitis capitata (Diptera: Tephritidae))的先决条件。为此,研究人员对影响褐飞虱相关昆虫病原真菌发生和分布的因素进行了研究。研究人员从摩洛哥苏斯地区的自然和种植区采集了土壤样本(22 份):结果:通过使用蝇蛹作为诱饵,共获得了 260 个真菌分离物,隶属于 22 个种和 10 个属。在所有研究的土壤中都检测到了蝇类真菌,蛹的感染率从 3.33% 到 48% 不等。最常见的是镰刀菌属和牛至真菌属,分别有 83 个分离株(32%)和 50 个分离株(19.23%)。分离出的菌种对蝇蛹的致病性测试表明,一些菌株的死亡率高达 91%。主成分分析(PCA)表明,土壤的来源、物理和化学性质对这些真菌的数量有很大影响。一般来说,pH 值适中(7.5-8)、沙粒和有机物含量较高的土壤中,蝇蛆相关真菌的数量较多。相对湿度高对这些真菌的数量有负面影响。这两个因素都直接影响蛹的真菌感染率。真菌对这些参数的反应因物种而异。根据主成分分析(PCA),摩洛哥坚果田和森林的土壤比柑橘园更适合蝇类真菌的生长:这些结果有助于确定适合有效应用昆虫病原真菌作为生物防治剂的土壤。总之,分离出的本地菌株似乎是一种很有前景的防治帽带蝇的选择。
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来源期刊
BMC Ecology
BMC Ecology ECOLOGY-
CiteScore
5.80
自引率
4.50%
发文量
0
审稿时长
22 weeks
期刊介绍: BMC Ecology is an open access, peer-reviewed journal that considers articles on environmental, behavioral and population ecology as well as biodiversity of plants, animals and microbes.
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