The Effects of Climate Change on the Activity of the Lobesia botrana and Eupoecilia ambiguella Moths on the Grapevine Cultivars from the Tarnave Vineyard

Knowledge about the geographical areas preferred by grapevine moths, the size of the populations, and the attraction to certain cultivars supports winegrowers for a better zoning of vineyards and vine cultivars, which is in continuing dynamic due to the climate change. Grapevine moths Lobesia botrana (Denis & Schiffermuller) and Eupoecilia ambiguella (Hubner) are the main pests of grapes in the Tarnave vineyard. For this reason, the influence of the cultivar in the climatic conditions of 2016-2019 period on the dynamics of the two moths species was evaluated in five plantations (Jidvei, sona, Samniclaus, Tauni and Cenade) from Tarnave vineyards on five cultivars Feteasca regala, Sauvignon blanc, Chardonnay, Traminer and Rhine Riesling. During the studied period, the climate experienced deviations from the multiannual values. Our results highlight different activities of the two moth species. The number of captures was influenced by climatic conditions, geographical area and grape cultivar. L. botrana prefers drier climates, lower geographical areas and Traminer cultivar; meanwhile, E. ambiguella prefers wetter climates, higher hilly areas and the Sauvignon blanc cultivar. These findings are important in the general context of grapevine protection in order to reduce the use of pesticides by choosing the right cultivars in the appropriate climate conditions.