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Paecilomyces tenuipes (Peck) Samson, ein seltener insektenpathogener Pilz an Noctuiden

Paecilomyces tenuipes (Peck) Samson, a rarely occurring entomopathogenic fungus attacking noctuids

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Abstract

The entomopathogenic fungusPaecilomyces tenuipes was isolated from dead noctuid pupae the identification of which was impossible. Some remarks are given on the morphology of this fungus rarely occurring in our regions. Besides the conspicuous synnemata and the oblong oval conidia (6,0–10,0×2,0–3,8 μm from culture, 4,5–7,5 ×2,0–2,5 μm from infected larvae) brown coloured and thick-walled appressoria were formed on glass surfaces. Pathogenicity tests showed thatP. tenuipes can infect as well larvae ofMamestra brassicae andAgrotis segetum as pupae ofM. brassicae andAutographa gamma. The formation of a perfect state was never observed.

Zusammenfassung

Von eingegangenen, nicht mehr bestimmbaren Noctuiden-Puppen wurde ein in unseren Breiten seltener insekten-pathogener Pilz,Paecilomyces tenuipes, isoliert. Einige Beobachtungen zur Morphologie dieser Art werden angeführt. Neben den auffälligen Synnemata undden länglich-ovalen Konidien (6,0–10,0×2,0–3,8 μm vom Nährmedium, 4,5–7,5×2,0–2,5μm von infizierten Larven) bildetP. tenuipes auf Glasoberflächen braun gefärbte, dickwandige Appressorien. Versuche zur Ermittlung der Pathogenität ergaben, daß der Pilz Larven und Puppen verschiedener schädlicher Noctuiden-Arten zu infizieren vermag. Die Bildung einer Hauptfruchtform wurde in keinem Fall beobachtet.

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Zimmermann, G. Paecilomyces tenuipes (Peck) Samson, ein seltener insektenpathogener Pilz an Noctuiden. Anz. Schadlingskde., Pflanzenschutz, Umweltschutz 53, 69–72 (1980). https://doi.org/10.1007/BF01965893

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