European phd network "insect Science"
Author(s)
roberto masturzi
Date Issued
2024
Type
conferenceObject
Abstract
The big bud mite, Phytoptus avellanae Nalepa (Acari: Phytoptidae), is responsible for severe infestations of both vegetative and reproductive hazelnut buds, causing hypertrophic alterations in the tissues and the formation of pseudo-galls (big buds), which result in decreased productivity. Despite the damage it causes in various hazelnut-growing regions, several aspects of the biology and management of this pest still require further investigation and improvement.
Monitoring activities using different strategies were conducted in 2023 and 2024 in the Viterbo province (Lazio Region, Italy). During winter, the infestation level was assessed by counting big buds, both in a hazelnut variety collection to evaluate variations in susceptibility among the world’s main cultivars and in hazelnut orchards managed under IPM, organic, and renaturalized practices (where cultivation ceased thirty years ago) to assess the impact of phytosanitary management on the mite. Additionally, during the vegetative season, in the same orchards with different management practices, the presence of vagrant forms of Phytoptus avellanae and predatory mites (Acari: Phytoseiidae) was evaluated.
The results of this study showed significant differences in susceptibility among cultivars. In the renaturalized sites, both big buds and phytophagous mites were less abundant, while predatory mites, as expected, were more abundant compared to other managed orchards.
This study provides valuable insights into how current agronomic practices influence pest infestations and serves as a foundation for future research on one of the primary pests affecting hazelnut cultivation.