The abiotic stress as a factor responsible for gypsy moth outbreaks

Abstract

The close quantitative interrelation between the reaction of birch to abiotic stress "springÐsummer droughts# "the degree to which the yearly radial increment of trees decreases# and entomoresistance has been established[ Tree stands that were heavily defoliated by gypsy moth showed a much stronger reaction to the droughts which preceded the outbreaks by the decrease in their radial increment than those weakly defoliated by this phytophagous insect[ The reaction of trees to the abiotic stress is regarded as the key factor that controls the drop in their entomoresistance during outbreaks of gypsy moth in woods damaged by anthropogenic e}ects[

The effects of serotiny and rainfall‐cued dispersal on fitness: bet‐hedging in the threatened cactus Mammillaria pectinifera

“…Our model suggests that only if beetles are completely eradicated may the population persist in the long term. It is unclear whether these high predation rates have developed recently as an indirect result from anthropogenic influence, but it is known to facilitate insect and pathogen outbreaks in temperate systems (Manion 1981;Koltunov and Andreeva 1999;Marçais and Bréda 2006;Hartmann and Messier 2008). However, the fact that the two demographic studies available report heavy predation with substantial (and sometimes catastrophic) consequences for population growth, calls for a more detailed study of the predator-prey dynamics in this system.…”

Features Phenology Listogryzushchie Fillofagi in the South Preduralye

“…Непарный шелкопряд (L. dispar). Наиболее распространенный вид, наносящий колоссальный ущерб не только лиственным насаждениям, но и парковым, а также опасный для плодовых деревьев [8,9].…”