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This study investigated the phenology and population dynamics of potential insect vectors of Xylella fastidiosa Wells et al. and other Auchenorrhyncha species in olive and citrus groves of Chania province, Crete, Greece. Although X. fastidiosa has not been reported in Greece, its introduction could cause serious diseases in many crops, including olives and citrus. Olive groves of Olea europaea L. 'Koroneiki' were sampled systematically using sweep net and Malaise traps over 24 months. One citrus grove was sampled for one year using a Malaise trap. Sweep net samples were taken from the herbaceous cover, tree canopy, and field borders of olive groves. Auchenorrhyncha were more abundant on the herbaceous cover compared to the canopy and field margins. Aphrophoridae species were mostly found on the herbaceous cover and in low numbers during fall (October–December) and spring (April–May). Cicadellidae species, such as Euscelis spp., were frequently found on the herbaceous cover of both olive and citrus groves. One Aphrophoridae and several Cicadellidae species were recorded in the citrus grove. Altitude was found to influence the population abundance of some Auchenorrhyncha species in olive groves. These results provide information for effective integrated management of insect vectors and their vector-borne pathogens. [ABSTRACT FROM AUTHOR]

Relying on pesticides to safeguard crops has led to pest resistance and detrimental environmental and health consequences. Many integrated pest management programs focus on producers' decision-making processes when selecting and implementing pest management interventions. Alternative approaches such as integrated pest management and biological control have been implemented to address these challenges, with Greece as the research area. A quantitative study was oriented to consumers and producers to investigate their views on the effectiveness of pesticides, aiming to assess whether these perspectives influence their attitudes toward adopting pest management practices. Primary data were gathered through structured questionnaires to consumers and producer associations (focusing on tomatoes, olives, and citrus fruits) and analyzed through multivariate methods. The findings unveiled varying preferences and concerns regarding plant protection tools, with considerations such as product effectiveness, method awareness, and sustainability. Specifically, the study revealed aspects like the popularity and demand for specific plant protection tools, the knowledge of these experts about products and pest control methods, and their stance on sustainable agriculture and environmental aspects of pest control. [ABSTRACT FROM AUTHOR]

Chrysoperla species include well-known predators of aphids and other soft-bodied arthropods. As such, they are considered important biological control agents of herbivorous pests in agroecosystems where many of green lacewings species occur. Despite the high number of species of the genus Chrysoperla , only a few have been assessed for the predation efficiency of their larvae against pests infesting plants, and even fewer are currently marketed for use in biocontrol practice. Difficulties in species identification within the Chrysoperla carnea complex species in particular has been related to varying success of commercial C. carnea s.l. releases in the field. In this study, we assessed the ability of two Chrysoperla species, Chrysoperla agilis a member of the carnea cryptic species group, and Chrysoperla mutata of the pudica group to consume aphid and mealybug individuals and suppress their populations in sweet pepper plants. We found that third-instar larvae of both species were able to consume a high number of aphids (approximately 120 nymphs per larva) and mealybugs (approximately 105 nymphs per larva) within 24 h. Furthermore, the release of second-instar larvae of both C. agilis and C. mutata was shown to be remarkably efficient in suppressing the pest populations in long-term greenhouse experiments. Aphid populations were suppressed by approximately 98% and mealybugs by 78% as compared to control plants. Our results highlight the predation efficiency and the biocontrol potential of two widespread Chrysoperla species for their use in pest control. [ABSTRACT FROM AUTHOR]

Quantifying functional responses is a cornerstone in evaluating the predation efficiency of biological control agents such as predatory insects and mites. In this study, we investigate whether the efficiency of Neoseiulus californicus (Acari: Phytoseiidae) in consuming prey is driven by intraspecific interactions. For this purpose, laboratory functional response experiments were conducted using one, two, three or four predators at several initial egg densities of the two‐spotted spider mite, Tetranychus urticae (Acari: Tetranychidae).The data fitted to the predator‐dependent Crowley–Martin model which accounts for intraspecific interactions. The results suggest that at high prey densities, i.e. the densities at which the predator is satiated, intraspecific interactions did not affect the predation potential of N. californicus, as the maximum number of T. urticae eggs that can be attacked by predator individuals did not differ between treatments (i.e., predator densities).However, at low prey densities and the highest predator density (i.e., four individuals), intraspecific interactions were detected, as revealed by the estimated attack rates, i.e. the per capita prey consumption at low prey densities. While mean attack rates did not differ significantly when one, two and three predators were exposed to prey, when predator density increased to four individuals, attack rate was considerable lower compared to the other predator densities.These results indicate that intraspecific interactions are more intense at low prey densities, where the predator is not satiated and therefore digestion breaks do not exist. In contrast, at high prey densities digestion breaks exist, so that may fully accommodate the cost of intraspecific interactions. These results also suggest that predator density should be considered when functional responses are measured. [ABSTRACT FROM AUTHOR]

The island of Crete, due to the favorable temperate environmental conditions, is known for its high insect species biodiversity. In this contribution, we report the occurrence of two leafhoppers in Crete, Greece, Euscelis ohausi (Wagner) and Euscelidius variegatus (Kirschbaum) (Hemiptera: Cicadellidae), collected during systematic surveys for Auchenorrhyncha performed from 2017 to 2019. This represents the first record of these leafhopper species for the island of Crete. Data on their distribution and bioecology on the island are included. [ABSTRACT FROM AUTHOR]