NATURAL OCCURRENCE OF ENTOMOPATHOGENIC FUNGI IN APPLE ORCHARDS IN GERMANY

Carina Anette Ehrich; Julia Spitzer; Ekaterina Popova; Dietrich Stephan

All Papers

Submission

Paper Title

NATURAL OCCURRENCE OF ENTOMOPATHOGENIC FUNGI IN APPLE ORCHARDS IN GERMANY

Authors

Carina Anette Ehrich
Julia Spitzer
Ekaterina Popova
Dietrich Stephan

Modality

Abstract

Subject area

Fungal stress in agriculture: including biological control of insect pests

Publishing Date

15/05/2019

Country of Publishing

Brasil

Language of Publishing

Inglês

Paper Page

https://www.even3.com.br/anais/isfus/161478-natural-occurrence-of-entomopathogenic-fungi-in-apple-orchards-in-germany

ISBN

978-85-5722-210-6

Keywords

biological control, entomopathogenic fungi, stress factors

Summary

In the project “Biological control as ecosystem service in integrated and organic pome fruit cultivation” we investigated the occurrence of entomopathogenic fungi (EPF) and evaluated their controlling function as natural antagonists. Therefore, soil samples were collected three times a year in spring, summer and autumn from 2016-2018. The sampling took place in three of the main apple growing regions in Germany. These regions are located in the North (Altes Land), the Center (Kraichgau) and the South (Lake Constance) of Germany. The samples were collected in integrated as well as in organic managed orchards and additionally in orchards with very few or without pest management or plant protection. Using the Galleria bait method by Zimmermann (1986) and a modified version with Tenebrio molitor, the soil samples were examined for the occurrence of entomopathogenic fungi of the genera Beauveria, Isaria and Metarhizium. Furthermore, different tests were conducted with three of the isolated entomopathogenic fungi to describe their attributes. In tests on agar plates, we examined the influence of three chemical-synthetic fungicides, one copper and one sulfur based fungicide and one herbicide on entomopathogenic fungi. All of these pesticides are commonly used in apple orchards and therefore a negative impact on the occurrence of entomopathogenic fungi cannot be excluded. Additional bioassays were conducted with three fungal strains to test their virulence against pest insects of apple. The results show a considerable regional difference in the occurrence of entomopathogenic fungi. In southern Germany the genus Metarhizium was dominating whereas in northern Germany mainly the genus Beauveria was isolated. Furthermore, no major seasonal effects were found. All of the chemical-synthetic fungicides had a negative impact on the tested entomopathogenic fungi, whereas the copper and sulfur based fungicide differed. No fungal growth was monitored when the Glyphosate-based herbicide was added to the agar medium. The impact on pest insects of apple orchards indicates that there is an ecosystem service of EPF in apple orchards.

Title of the Event: III International Symposium on Fungal Stress – ISFUS
City of the Event: São José dos Campos
Title of the Proceedings of the event: Annals of the International Symposium on Fungal Stress – ISFUS
Name of the Publisher: Even3
Means of Dissemination: Meio Digital

How to cite

EHRICH, Carina Anette et al.. NATURAL OCCURRENCE OF ENTOMOPATHOGENIC FUNGI IN APPLE ORCHARDS IN GERMANY.. In: Annals of the International Symposium on Fungal Stress – ISFUS. Anais...São José dos Campos(SP) Hotel Nacional Inn, 2019. Available in: https//www.even3.com.br/anais/ISFUS/161478-NATURAL-OCCURRENCE-OF-ENTOMOPATHOGENIC-FUNGI-IN-APPLE-ORCHARDS-IN-GERMANY. Access in: 18/05/2025