Characterization of the sensitivity of Algeria native grape vines to phylloxera (Daktulosphaira vitifoliae)

Abstract

Phylloxera (Daktulosphaira vitifoliae) has always been considered one of the most dreaded diseases of Algerians vineyards . Our study will assess the sensitivity of varieties of vitis vinifera vinifera ssp indigenous Algerians phylloxera lesion compared three different rootstocks (41B Mgt, SO4, Paulsen 1103) and some individuals Vitis vinifera ssp sylvestris.

  The method applied is the contamination Pr Boubals timber harvested cultivars studied have been made ​​in two eyes and cuttings into pots containing a substrate formed from grape marc (1/3) + peat (1 / 3) and river sand (1/3) and stored in a controlled greenhouse tunnel.

Susceptibility testing was performed by taking on sensitive rootstocks vineyards mothers, leaves covered with galls of Phylloxera and buried pots cuttings tested. This operation is performed by inoculation early spring, mid-spring and late summer.

Two weeks after the last inoculation, observations on roots, we learn about the behavior of phylloxera snout to the root system.

  Quantifying the presence or absence of tubercles and nodules just reveal both the resistance or susceptibility of these varieties. Attacks on root aphids have caused damage of varying severity depending on grape variety and each plant species. However, through the importance of symptoms observed, we can conclude that varieties and species studied appear to have a certain sensitivity to phylloxera, but tolerance levels variables.