Influence of Grapevine Vigor on the Dynamic and the Installation of the Invasive Pest Jacobiasca lybica in Mitidja, Algeria
Year: 2018
Type: article
Abstract: The vigor of six grapevine varieties was followed over three consecutive years in order to evaluate and analyze its impact on the installation and selection of egg laying sites by an invasive bio-aggressor in Algerian vineyards. The vigor was estimated by weighing the pruning during dormancy period from December during three years. A total of ten vines were randomly selected along the diagonal of the plot. Although the distribution of Jacobiasca lybica seems to be slightly in favor of some grape varieties compared to others, host vigor seems to be one of the major parameters affecting the repartition and distribution of this pest. The examination of the Principal Component Analysis (PCA) showed many similarities; group 1 included the less vigorous varieties (namely Cardinal, Syrah and Muscat of Alexandria), followed by group 2 including the Dattier of Beirut. On the other hand, group 3 with Cabernet Sauvignon and group 4 with Merlot varieties, are considered the most vigorous, but did not show a correlation between larval infestations and adult populations. Furthermore, from a numerical point of view, these grape varieties have the highest number of individuals as much as adults than larvae. In contrast, it was observed a very pronounced adult trend with grape vigor.
Language: English
Subfield: Insect Science
Domain: Life Sciences
SDGs: Zero hunger, Life on land
Open Access status: green
OpenAlex ID: W4398138656