We studied the energetic cost of vibrational signalling in the leafhopper Aphrodes makarovi (Hemiptera: Cicadellidae). Males were emitting three types of vibrational signals (advertisement calls, masking signals and pulse signals), and the respiration rate was significantly positively correlated with the cumulative signalling time. Our results showed that vibrational signalling was around 12.4 times energetically more demanding than resting. The average male longevity was 50 days, and survival was negatively correlated with the number of emitted advertisement calls, calling rate and calling time in early life.
COBISS.SI-ID: 3364687
This master thesis was the first attempt for resolving the molecular diversity of AP phytoplasma in Slovenia. The official samples from different areas of Slovenia in the period of several years were included and examined in the study.
COBISS.SI-ID: 3571535
Trials were carried out in apple orchards of two different training systems to assess the relationship between spray drift and parameters of spraying with an emphasis on the sprayer's travel speed when applying different solutions, such as pesticides or fertilizers, onto the apple trees. In this paper, all tested factors and interactions were found to have a significant effect on the spray drift during spray application.
COBISS.SI-ID: 3856684
The egg and fifth instar immature of the jumping plant-louse Bactericera lyrata Seljak, Malenovský & Lauterer, 2008 (Hemiptera: Psylloidea: Triozidae) are described and illustrated for the first time based on material collected in Slovenia and reared on Potentilla reptans (Rosaceae) which is confirrmed as a host plant.
COBISS.SI-ID: 3693563
We investigated the influence of female reply duration on male mate-searching effort in the leafhopper Aphrodes makarovi in which the female reply is essential for successful location of the female. In a duet, the beginning of a female reply overlaps the end of the male call and males evaluate only the nonoverlapped duration of the female reply. In playback experiments we varied the duration of female replies within the natural range. The duration of a female reply was negatively correlated with the male calling effort. By increasing her reply duration a female may significantly reduce the male's direct and indirect costs associated with signalling and searching, thus, ultimately, affecting male reproductive success. Males showed high adaptability in signalling behaviour and when female replies were short, searching males shortened the last section of their advertisement calls. This strategy allows the nonoverlapped part of the female reply to be longer irrespective of its overall duration. Despite its deceptively simple form, vibrational duetting may entail more complex interactions than just temporal coordination.
COBISS.SI-ID: 3801679