Helena Rojht (Author), Franc Budija (Author), Stanislav Trdan (Author)

Abstract

Paper presents a larval cannibalism of green lacewings (Chrysoperla carnea ), which was observed during the laboratory bioassay on non-target effect of entomopathogenic nematodes against green lacewings larvae. The most probable reason for larval cannibalism were undersized Petri dishes in which the bioassay was performed. Due to large number of larvae per surface unit, frequent crossing of green lacewings larvae appeared and this consequently lead to cannibalism. In most cases larger, elder larv ae consumed smaller, younger larvae. Cannibalism increased with temperature rise and was the most intensive at 25 °C. At this temperature the larval mortality was 22.0 % after two days, while after four days the larval mortality reached 31.0 %

Keywords

neuroptera;pest insects;pest control;feeding habits;nematodes;biological control;environmental factors;population density;mortality;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL BF - Biotechnical Faculty
Publisher: Biotehniška fakulteta
UDC: 632
COBISS: 6021753 Link will open in a new window
ISSN: 1581-9175
Parent publication: Acta agriculturae Slovenica
Views: 1291
Downloads: 330
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Other data

Secondary language: Slovenian
Secondary title: Vpliv temperature na stopnjo kanibalizma med ličinkami navadne tenčičarice (Chrysoperla carnea Stephens, Neuroptera, Chrysopidae)
Secondary abstract: V prispevku je predstavljen kanibalizem med ličinkami navadne tenčičarice (Chrysoperla carnea), ki se je pojavil pri laboratorijskem preučevanju neciljnega delovanja entomopatogenih ogorčic na ličinke omenjenega naravnega sovražnika. Najverjetnejši vzrok za pojav kanibalizma so bile premajhne petrijevke, v katerih je potekal poskus. Zaradi velikega števila ličink navadne tenčičarice na enoto površine, je prišlo do pogostega srečevanja ličink in posledično do kanibalizma. V večini primerov so ličinke višjega larvalnega stadija pojedle manjše ličinke. Kanibalizem se je povečeval z višanjem temperature in je bil najbolj intenziven pri 25 °C, kjer je bila smrtnost ličink dva dni po začetku poskusa 22,0 %, po štirih dneh pa 31,0 %.
Secondary keywords: temperatura;okoljski dejavniki;kanibalizem;navadna tenčičarica;laboratorijski poskus;entomopatogene ogorčice;biotično varstvo rastlin;
URN: URN:NBN:SI
Type (COBISS): Not categorized
Pages: str. 5-9
Volume: ǂLet. ǂ93
Issue: ǂŠt. ǂ1
Chronology: 2009
ID: 1731795