Developing a generic sampling system for monitoring the key arthropod pests of table grapes, Vitis vinifera L.
Titel:
Developing a generic sampling system for monitoring the key arthropod pests of table grapes, Vitis vinifera L.
Auteur:
de Villiers, Marelize Pringle, Ken L.
Verschenen in:
International journal of pest management
Paginering:
Jaargang 54 (2008) nr. 3 pagina's 207-217
Jaar:
2008-07
Inhoud:
We describe a system developed for monitoring arthropod pests of table grapes in the Hex River Valley, South Africa. The system has wide applicability for monitoring pests at grape-producing localities in the country. Six Vitis vinifera cv. Barlinka and six V. vinifera cv. Dauphine vineyards were used as sampling sites. In each vineyard, 100 vines were inspected bi-weekly, to record damage or the presence of arthropod pests on the cordon, one bunch and one leaf per vine. Sampling precision and operating characteristic (OC) curves were estimated for each of the pests. Using previously determined economic thresholds together with the OC curves, action thresholds were determined for Tetranychus urticae Koch (Prostigmata: Tetranychidae) (11-29% leaf infestation), Planococcus ficus (Signoret) (Hemiptera: Pseudococcidae) (2% cordon infestation), Epichoristodes acerbella (Walker) (Lepidoptera: Tortricidae) and Phlyctinus callosus Boh. (Coleoptera: Curculionidae) (1% bunch damage). This novel system can be used for monitoring arthropod pest population levels in all types of South African vineyards, providing a basis for the development of integrated pest management (IPM) systems in these vineyards.
Tijdschrift beschrijving