Sensitivity of domestic and domesticated olive varieties to the attack of the olive fly in olive orchards in Vodnjan and Benkovac

Maslinina muha (Bactrocera oleae (Rossi, 1790) najznačajniji je štetnik masline. Muha je monofagni i tehnološki štetnik čije ličinke uzrokuju kvalitativne i kvantitativne štete na plodovima masline koje se kasnije odražavaju i na kvalitetu ulja. Cilj ovog rada bio je utvrditi i usporediti sortnu osjetljivost šest široko zastupljenih domaćih i udomaćenih sorata masline (Oblica, Istarska bjelica, Ascolana tenera, Frantoio, Leccino i Pendolino) na napad maslinine muhe. Plodovi masline prikupljeni su u studenom 2020. godine u masliniku na području Vodnjana i Benkovca. Od svake sorte odabrana su po 3 stabla, te je sa svakog stabla prikupljeno po 100 plodova masline. Razvoj muhe praćen je na tjednoj bazi. Rezultati istraživanja su pokazali da je 2020. godina bila vrlo povoljna za razvoj i napad štetnika. Prisutnost muhe utvrđena je kod svih istraživanih sorti u visokoj brojnosti. Najosjetljivije sorte iz kojih se je razvio najveći broj štetnika bile su Istarska bjelica, Frantoio i Ascolana tenera, a najotpornija sorta iz koje se je razvio najmanji broj štetnika bila je Pendolino. Na osjetljivost sorte na napad maslinine muhe uz karakteristike sorte utječu i agroekološki uvjeti i agrotehnički zahvati, dok značajnije razlike u napadu između domaćih i udomaćenih sorti nisu opažene.The olive fruit fly (Bactrocera oleae (Rossi, 1790) is the most significant olive pest. The fly is a monophagous and technological pest whose larvae cause qualitative and quantitative damage to olive fruits which later affect the quality of the olive oil. The aim of this study was to determine and compare varietal susceptibility of six widely represented domestic and domesticated olive cultivars (Oblica, Istarska bjelica, Ascolana tenera, Frantoio, Leccino and Pendolino) on olive fruit fly attack. From each variety 3 trees were selected, and 100 olive fruits were collected from each tree. Fly development was monitored on a weekly basis. The results of the research showed that 2020 was very favorable for the development and attack of pests. The presence of the fly was determined in all investigated varieties in high numbers. The most sensitive varieties from which the largest number of pests developed were Istarska bjelica, Frantoio and Ascolana tenera, and the most resistant variety from which the smallest number of pests developed was Pendolino. The susceptibility of the variety to the attack of the olive fruit fly, in addition to the characteristics of the variety, is also influenced by agroecological conditions and agrotechnical interventions, while significant differences in attack between domestic and domestic varieties were not observed