Copulatory behavior of predacious ladybirdHarmonia axyridis(Coleoptera: Coccinellidae) under different illuminative conditions

Abstract

As one of the most important environmental factors, the light condition may influence the performance of development and physiological behavior in insect. The variation of light environment could induced many negative phenomenon, such as diapause, courtship inhibition and lower food consume. The intensive research on the light influences may promote the efficiency in massive rearing and population manipulation of the natural enemy. We focused on the key predacious natural enemy coccinellid Harmonia axyridis, which has been utilized as efficacious biological control agent to suppress various arthropod herbivores at present study to reveal the influences of light intensity, photoperiod and wavelength to the copulatory behavior and fertility by using an animal behavior automatic observation monitoring system. Totally 3 illuminative factors and 17 treatments, included light intensity ( 600 lx、900 lx、1200 lx、1500 lx、1800 lx 及 2100 lx) , photoperiod ( light: dark = 0:24、6:18、12:12、18:6 and 24:0) , and light wavelength ( violet (395 nm) , blue (480 nm) , green (510 nm) ,yellow ( 75 nm) , orange ( 610 nm) and red ( 685 nm) ) were set as different environment conditions respectively. By reviewing the video records, the results showed that: ( 1 ) There are significant differences of each copulatory behavior and fertility between light and dark conditions of H. axyridis; ( 2) the courtship behavior was not

Efectos de la luz artificial en la vida silvestre: caso de los insectos del orden Coleoptera

“…El tiempo de incidencia y la intensidad de luz influyen en los ritmos biológicos de diversos lapsos a través del fotoperiodo. El comportamiento reproductivo de Harmonia axyridis (Pallas, 1773) (Coleoptera: Coccinellidae) es más activo a medida que aumenta el tiempo de luz en los fotoperiodos de 0:24 a 24:0 (luz: oscuridad) (Wang et al, 2014a). Este último fotoperiodo puede aumentar la mortalidad a largo plazo como en Astylus trifasciatus (Guérin-Méneville, 1844) (Coleoptera: Melyridae) (Valenzuela-Zuccar, 2020).…”

“…En H. axyridis y Propylea japonica (Thunberg, 1781) (Coleoptera: Coccinellidae) evidenciaron que la duración y cantidad de cópulas, intervalo entre cópulas y tiempo de persecución varían según el fotoperiodo, la iluminancia y las longitudes de onda. Por ejemplo, la duración de cópulas disminuye a mayor iluminación (Wang et al, 2014a(Wang et al, , 2014b.…”

“…En H. axyridis y P. japonica la fertilidad y fecundidad varían conforme a las longitudes de onda, los fotoperiodos y la iluminancia. Por ejemplo, hay mayor fertilidad en luz verde y mayor fecundidad en luz amarilla (Wang et al, 2014a(Wang et al, , 2014b…”

“…Indriyanti, Wijayanti y Setiati (2021) demostraron que la combinación de estímulos olfativos y visuales mejoran las trampas para O. rhinoceros. Por otro lado, ciertas condiciones de iluminación favorecen a los controladores biológicos como H. axyridis y C. septempunctata (Wang et al, 2014a;Miller et al, 2017).…”

Effect of Cannibalism on the Growth and Development ofMallada basalis(Neuroptera: Chrysopidae)

“…Cannibalism has been observed in a number of animals and is seen as a force that structures predatory insect communities (Polis et al 1989;Dong & Polis 1992). Newly eclosed coccinellid larvae may improve their survival rate by feeding on conspecific eggs (Gagné et al 2002), and larval cannibalism of coccinellids increases their rates of success of pupation and emergence (Wang 2010). Thus, cannibalism is adaptively significant for ladybirds to raise their survival rate in adversity (Agarwala & Dixon 1992).…”