Influence of Grapevine Cultivar on the Second Generations of Lobesia botrana and Eupoecilia ambiguella

Abstract

Grapevine cultivar can affect susceptibility to Lobesia botrana and Eupoecilia ambiguella with important implications on control strategies. A four-year study was carried out in north-eastern Italy on 10 cultivars (Cabernet Sauvignon, Carménère, Chardonnay, Merlot, Refosco dal Peduncolo Rosso, Rhine Riesling, Sauvignon Blanc, Terrano, Tocai Friulano and Verduzzo Friulano) grown in the same vineyard to assess whether the cultivar affects second-generation population levels of the two vine moths and L. botrana larval age composition. The influence of bunch traits measured at the peak of egg hatching on demographic parameters was also evaluated. Over the four years, L. botrana significantly prevailed over E. ambiguella in nine cultivars. Chardonnay and Tocai Friulano were the most infested cultivars and Merlot was the least infested. At the sampling date, the age composition of L. botrana varied with cultivar, with the larvae being significantly older on Chardonnay and younger on Carménère, Merlot and Verduzzo Friulano. Older larval age was significantly associated with higher bunch compactness. Larval infestation was not significantly influenced by either bunch compactness or berry volume, which suggested a more important role for contact and volatile substances mostly originating from the berries. These results allow for the improvement of Integrated Pest Management strategy against vine moths.

The Impact of Microbial and Botanical Insecticides on Grape Berry Moths and Their Effects on Secondary Pests and Beneficials

“…The European grapevine moth Lobesia botrana (Denis & Schiffermüller) is a traditional pest of grapes in Europe and the Middle East [1,2] and a new threat in the Americas [3,4]. Lobesia botrana coexists with the grape berry moth Eupoecilia ambiguella (Hübner) in several European regions, such as northern Italy, where they develop three generations per year in most areas and seasons [5]. The impact of L. botrana is increasing in Europe, probably because of climate change [2,6].…”

Side Effects of Sulfur Dust on the European Grapevine Moth Lobesia botrana and the Predatory Mite Kampimodromus aberrans in Vineyards

“…Bacillus thuringiensis is rarely used due to its lower efficacy and persistence than those of synthetic insecticides [ 13 ]. Additionally, choice of cultivar [ 14 , 15 , 16 , 17 , 18 ] and cultural practices such as controlled nitrogen fertilization [ 19 ], bunch-zone leaf removal [ 20 , 21 ], and kaolin applications [ 22 ] can help reduce infestations and damage by L. botrana .…”

Do Grapholita funebrana Infestation Rely on Specific Plum Fruit Features?

“…In conventional agriculture, this pest is primarily controlled by the use of broad-spectrum insecticides [19]. In organic plum orchards, good fruit protection can be achieved by alternating a low number of spinosad applications and mineral oil applications, despite the short period of effectiveness typical of spinosad [27].In other tortricid species, the effect of the cultivar in the oviposition choice has been assessed in field studies for Lobesia botrana (Denis and Schiffermüller), Eupoecilia ambiguella (Hübner) Grapholita molesta (Busck), and Cydia pomonella (L.) [28][29][30][31]. In laboratory tests, preference for different apple cultivar was demonstrated for C. pomonella [32], whereas the influence of fruit characteristics like shape, size, texture and colour on L. botrana and E. ambiguella have been studied [33].…”

“…In other tortricid species, the effect of the cultivar in the oviposition choice has been assessed in field studies for Lobesia botrana (Denis and Schiffermüller), Eupoecilia ambiguella (Hübner) Grapholita molesta (Busck), and Cydia pomonella (L.) [28][29][30][31]. In laboratory tests, preference for different apple cultivar was demonstrated for C. pomonella [32], whereas the influence of fruit characteristics like shape, size, texture and colour on L. botrana and E. ambiguella have been studied [33].…”