Dovzetnost bub plodove vinske mušice (Drosophila suzukii (Matsumura, 1931)) za okužbo z entomopatogenimi glivami

Jaka Razinger, Katja FINK, Ana KERIN, Špela MODIC, Gregor UREK

Povzetek


Zatiranje plodove vinske mušice (PVM) (Drosophila suzukii (Matsumura, 1931), Diptera, Drosophilidae) je težavno, ker ima vrsta izjemen razmnoževalni potencial, je polifagna in ima ostro nazobčano leglico, s katero lahko predre povrhnjico zdravih plodov, v katere nato izleže jajčeca. Poleg tega se odrasle žerke lahko zabubijo v tleh, kjer so zavarovane pred insekticidi. Naša hipoteza je bila, da bodo talne glive, ki so patogene za žuželke, znatno zmanjšale izleganje mušic iz okuženih bub PVM. Bube PVM smo okuževali z več entomopatogenimi in talnimi glivami: a) v substratu, okuženim s konidiji gliv, b) z neposrednim nanosom suspenzije gliv na bube ter c) z namakanjem bub v suspenzijo gliv. Gliva Metarhizium brunneum Petch izolat H.J.S. 1154 je značilno zmanjšala izleganje PVM v okuženem substratu, bioinsekticid Naturalis (na podlagi entomopatogene glive Beauveria bassiana (Bals.-Criv.) Vuill.) pa v poskusih neposredne izpostavitve. Poskus namakanja bub v suspenzijo gliv, s katerim smo želeli določiti IC50 izleganja bub, je bil neuspešen. Sklepamo, da je razvojni stadij bube PVM prekratek, da bi glive izrazito vplivale na izleganje odraslih osebkov PVM. Skladno z našimi rezultati in objavljeno literaturo, bi bilo smiselno preučiti potencial entomopatogenih gliv v biotičnem varstvu neposredno na odraslih osebkih PVM.

Ključne besede


biotično varstvo rastlin; entomopatogene glive; jagodičevje; škodljivci; talne glive; virulenca; žuželke

Celotno besedilo:

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Literatura


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DOI: http://dx.doi.org/10.14720/aas.2017.109.1.12

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