Rezidualno djelovanje novog insekticida (A19526X) na parazitsku osicu Aphidius colemani Viereck

master's thesis

• Title (english): The residual effect of new insecticide (A19526X) on parasitic wasp Aphidius colemani Viereck
• Author: Elizabeta Gavić
• Mentor: Maja Čačija (mentor)
• Committee member: Maja Čačija (predsjednik povjerenstva)
• Committee member: Renata Bažok (član povjerenstva)
• Committee member: Dinka Grubišić (član povjerenstva)
• Committee member: Sandra Skendžić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Department of Agricultural Zoology); Zagreb
• Defense date and country: 2019-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Lisne uši iz porodice Aphididae predstavljaju veliki problem u poljoprivrednoj proizvodnji jer
često razvijaju rezistentnost na insekticide. Zbog toga se preporuča uporaba bioloških mjera
zaštite. Parazitska osica Aphidius colemani (Hymenoptera: Braconidae) uspješno se koristi u
biološkom suzbijanju mnogih ekonomskih važnih lisnih uši, posebice pamukove lisne uši
(Aphis gossypii Glover) te zelene breskvine uši (Myzus persicae Sulzer). Ciljevi ovog
istraživanja bili su u laboratorijskom pokusu utvrditi rezidualno djelovanje i perzistentnost
novog insekticida (A19526X) na odrasle jedinke parazitske osice Aphidius colemani.
Istraživanje je provedeno folijarnim tretiranjem biljaka paprike u šest varijanti, svaka u četiri
ponavljanja: novi ispitivani insekticid (A19562X) u tri doze, dva sistemična insekticida
(spirotetramat i imidakloprid) te kontrola. Tretirane biljke postavljane su pojedinačno u
kaveze. Odrasle jedinke Aphidius colemani ispuštane su u kaveze 24 sata i sedam dana nakon
primjene insekticida. Mortalitet je očitan 48 sati nakon ispuštanja osica u kaveze.
Imidakloprid se kao standardni sistemik pokazao najučinkovitijim na parazitsku osicu, a
djelovao je perzistentno i devet dana nakon tretiranja. Spirotetramat je imao zanemariv
učinak. Istraživani insekticid A19526X pokazao je slabo rezidualno djelovanje na osicu A.
colemani. Bio je slabo perzistentan osmi dan od tretiranja, a deveti dan polučio je
učinkovitost od 23,5 %. S obzirom na rezultate, insekticid A19526X možemo smatrati
sigurnim za prirodnog neprijatelja pri suzbijanju lisnih uši, jer ne utječe značajno na
mortalitet parazitske osice A. colemani. Daljnja istraživanja trajanja perzistentnosti, kao i
učinak na druge razvojne stadije osice, svakako se preporučuju radi boljeg zaključka o
sigurnosti istraživanog insekticida za prirodne neprijatelje.

Abstract (english)

Aphids (family Aphididae) are a major problem in agricultural production because they are
prone to insecticide resistance development. Therefore, the use of biological protection
measures is highly recommended. The parasitic wasp Aphidius colemani Viereck
(Hymenoptera: Braconidae) has been successfully used in the biological control of many
economically important aphids, especially the cotton aphid (Aphis gossypii Glover) and the
green peach aphid (Myzus persicae Sulzer). This study aimed to determine the residual
activity and persistence of a novel insecticide (A19526X) on adult Aphidius colemani parasitic
wasps. The study was performed by foliar treatment of pepper plants in six variants, each in
four replicates: a new tested insecticide (A19562X) in three doses, two systemic insecticides
(spirotetramat and imidacloprid) and control. The treated plants were placed individually in
cages. Adult Aphidius colemani individuals were released into cages 24 hours and seven days
after insecticide application. The mortality was read 48 hours after the wasps were released.
Imidacloprid, as a standard systemic, proved to be most effective on the parasitic wasp and
persisted for nine days after treatment. Spirotetramat had a negligible effect and proved
safe for this wasp. The investigated insecticide A19526X showed poor residual activity on the
A. colemani. It was poorly persistent on the eighth day after treatment, and on the ninth day
it had an efficacy of 23.5%. Given the results, the insecticide A19526X can be considered safe
for natural enemies in the control of aphids, since it does not significantly affect the parasitic
wasp mortality. Further studies of persistence duration, as well as effects on other
developmental stages of the wasp, are certainly recommended for a better conclusion on
the safety of the investigated insecticide for natural enemies.

• Keywords: Aphidius colemani; mortalitet; parazitska osica; perzistentnost; rezidualno djelovanje
• Keywords (english): Aphidius colemani; mortality; parasitic wasp; persistence; residual activity
• Language: croatian
• URN:NBN: urn:nbn:hr:204:727301
• Study programme: Title: Organic Agriculture with Agrotourism; Study programme type: university; Study level: graduate; Academic / professional title: magistar / magistra inženjer/inženjerka ekološke poljoprivrede i agroturizma (magistar / magistra inženjer/inženjerka ekološke poljoprivrede i agroturizma)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2019-11-15 10:14:10