Occurrence, bionomics and harmfulness of Chrysomela populi L. (Coleoptera, Chrysomelidae)

Abstract

ABSTRACT:In 2003 to 2005, Chrysomela populi L. gradated on yearly cut Populus nigra var. italica in street alleys in Brno and elsewhere. Imagoes occurred on trees from the end of April or from the beginning of May. In rearing, the chrysomelid consumed unwillingly leaves of 2-year shoots and laid on average 142 eggs. On leaves of shoots, imagoes damaged 100 to 200 cm 2 during 5 to 7 weeks, produced 480 to 900 frass pellets and laid on average 506 eggs. Oviposition was continual with breaks amounting to on average 2.6 days. Embryonal development took 6 to 8 (in the laboratory 5) days. Larvae of the 1 st generation occurred from mid-May to mid-July. In the course of 2 weeks (in the laboratory during 10 days) of life, they damaged about 20 cm 2 leaves and produced about 300 frass pallets. In the laboratory, prepupae took 2 days and pupae 4 days. Imagoes of the 1 st generation occurred from June to September. They damaged on average 113 cm 2 and produced on average 553 frass pellets and 653 eggs. At a temperature of 24 to 28°C, imagoes damaged on average 84 cm 2 during 2 to 3 weeks and diapaused until the next year. On growing up leaves, imagoes lived longer showing higher consumption of food and higher fecundity as against new fully-grown leaves. Larvae of the 2 nd generation destroyed on average 2 cm 2 smaller area than larvae of the 1 st generation. Part or all imagoes of the 2 nd generation diapaused. Imagoes of the 3 rd generation damaged 40 to 70 cm 2 leaves before departure to wintering grounds. In our natural conditions, the prospective 3 rd generation is always incomplete. Cleonice callida Meig. and Schizonotus sieboldi (Ratz.) rank among important enemies.

Mycorrhiza-Triggered Transcriptomic and Metabolomic Networks Impinge on Herbivore Fitness

“…Changes in the biochemical composition of the leaves of EMF plants may have influenced the choice of the insects for oviposition. We suggest that the reduction in egg number on leaves of mycorrhizal poplar may result in decreased reproduction success and, consequently, could be a powerful mechanism to limit the abundance of C. populi, which can produce two to three generations per year (Urban, 2006).…”

Distribution and occurrence of the neogregarine pathogen, Ophryocystis anatoliensis (Apicomplexa) in populations of Chrysomela populi L. (Coleoptera: Chrysomelidae)

“…Here we focus on the occurrence and distribution of the neogregarine patho- Neogregarine Pathogen, Ophryocystis anatoliensis 287 gen, Ophryocystis anatoliensis to confirm whether the pathogen presented here would be an alternative natural suppressing factor in C. populi populations from several localities in Turkey. C. populi is known as an insect pest in the most abundant and most important species for forestry and it occurs in almost all countries of Europe (Urban 2006). However, there are few studies on natural entomopathogenic organisms suppressing its populations.…”

“…Chrysomela (= Melasoma) populi L. (Coleoptera; Chrysomelidae) is the most abundant and most important poplar pest species in Europe, frequently causing extensive damage in young poplar plantations and nurseries (Augustin et al 1993;Urban 2006). The effect of this beetle is a reduction in biomass or the death of young nursery plants.…”

Occurrence and impact of the parasitic mite Linobia coccinellae on its host beetle Chrysomela populi: implications for its potential as a biological control agent

“…The red poplar leaf beetle, Chrysomela populi L. (Coleoptera: Chrysomelidae), is one of the most common and harmful insect pests of poplar (Templin, 1957; Loi, 1970). Two (under favourable conditions three) overlapping generations of the beetle develop in a single year (Urban, 2006). In spring, at temperatures of 12–13 °C, adults leave their overwintering places and start to feed on young leaves of poplars (Urban, 2006).…”