جستجوی مقالات مرتبط با کلیدواژه « مگس میوه زیتون » در نشریات گروه « گیاهپزشکی »

The olive fruit fly, Bactrocera oleae Rossi, is an important monophagous and multigenerational pest of olive fruit. Considering the damage caused by this pest, in this research, the effect of some plant hormones to reduce the pest population on Fishmi variety was investigated in the form of a complete randomized block design during the years 2021 and 2022. Trees were sprayed with jasmonic acid (1 and 2 mg/liter), salicylic (1 and 2 mM) two times before flowering and fruit growth. The results of investigating the density of different immature growth stages of this pest (eggs, first-instar, second-instar, third-instar larvae and pupae) in two years of the experiment showed that the effect of the year was significant only in the egg trait, and the effect of the treatment in other traits with significant differences (except the eggs and larvae of the first ages) were at the probability level of one percent. Examining the morphological characteristics of the fruit showed that the effect of the treatment on the length, weight, volume, density and weight of the flesh of the fruit; And the effect of the treatment in the year, only in the length and width of the fruit and kernel, and the kernel weight were significant at the probability level of 1%. Therefore, jasmonic acid and salicylic acid compounds can disrupt the life cycle and reduce pest damage by affecting some morphological traits and increasing the amounts of secondary metabolites of the fruit, by creating antibiosis resistance.

Olive fruit fly Bactrocera oleae (Rossi). (Dip.: Tephritidae) is the main pest of olive orchards in Guilan, Qazvin and Zanjan provinces. In this study seasonal population fluctuations, bio-ecology characteristics and olive orchard infestation were investigated in the orchards of Tarom Sofla (Ghazvin province) in 2014- 16. Sex pheromones (on yellow sticky traps) were used to catch the adult flies and fruit sampling carried out to reveal the pest development and fruits infestation rate. Based on the results, flight activity of the adults occurred throughout the season with different densities, which depends on weather conditions. The fly had 3-4 overlapping generation per year. Immature stages observed in mid-Jun. Ovipositing in the fruits (1st generation) started in late spring and early summer, coinciding with pit hardening. The 2nd generation found from mid-August to mid-September and the 3rd generation started from end of September. In three years, the fruit infestation means at Kalaj and Ghoshchi were 2.4%, 5.1%; 4.7%, 6.2% and 8.7%, 21.3%, respectively.