Persistence of the systemic activity of metalaxyl and fosetyl-Al applied as a soil drench or foliar spray to control Phytophora crown rot of peach

The persistence of the fungicides metalaxyl and fosetyl-Al, when applied by soil drenching or as foliar sprays against crown rot of peach by Phytophthora cactorum or P. citrophthora was examined. Metalaxyl and fosetyl- Al applied by soil drenching inhibited both Phytophthora species for 40 days, but inhibition was reduced after 60 days. Foliar application with fosetyl-Al inhibited both pathogens for at least 20 days, but metalaxyl was ineffective as a foliar spray. The data suggest that when applied as a soil drench both metalaxyl and fosetyl-Al provide effective control of Phytophthora crown rot of peach trees

First record and current status of the brown marmorated sting bug Halyomorpha halys damaging peaches and olives in northern Greece

The species Halyomorpha halys (Stål), which is endemic in East Asia, was first detected in North America in 1996 and was probably introduced into Europe in 2008. The species is polyphagous. It consumes over 170 host plant species and significantly impacts crop pro- duction. In Greece the first recording of its presence was in 2014, when it was reported as a nuisance in houses in the region of Athens. The present study describes the systematic spread and damage of this invasive pest, including the first recorded identification in peach and olive cultivations in the prefecture of Imathia in central Macedonia, Greece. Sampling was carried out in representative peach and olive farms during July and August, 2018 and 2019 in which significant levels of fruit damage were recorded, especially during 2018. The population of the species was recorded throughout the winter seasons of 2018 and 2019 in which overwintering adults were systematically recorded in shelters and other construc- tions near fruit orchards. Given the dynamics of the species and its destructive impact on a wide range of host species, H. halys is expected to be a major pest. Additionally, considering that the prefecture of Imathia is the most important peach growing area of Greece, further studies of the presence and population dynamics of this species along with the establishment of particular management actions to control the population is impera- tive for the future protection of horticultural production in Greece

Treatment of pistachios with boric acid, Zn-sulfate and Zn-chelate

We studied the effect of boric acid, Zn-sulfate and Zn-chelate on shell split and development of fruit rot diseases of the pistachio cultivar Eginis. The results showed that boric acid applied to soil and leaves together gave the highest percentage of shell split. Boric acid applied solely to the soil also increased significantly the percentage of shell split. In contrast, Zn-sulfate and Zn-chelate did not affect shell splitting, regardless of treatment No rotten fruit was found in any of the treatments, including the control