Control of powdery mildew (Podosphaera leucotricha) and European red mite (Panonychus ulmi) at scab resistant apple cultivars

Vilina Petrova, Maria Borovinova

Abstract: The integrated and biological apple production are alternative of conventional production where pesticides are the main for plant protection. A requirement of contemporary consumer for harmless food can be satisfied by decrease pesticides application and using only products with the least hazardous to human health, livestock and the environment. The investigations were carried out in apple orchards of the Institute of Agriculture, Kyustendil, during the period 2008 – 2011. Three scab resistant cultivars – Prima, Florina and Erwin Bauer grafted on the rootstocks MM 106 were planted in 1996. Four technologies were examined in four repetitions. The data of damages by powdery mildew and it control and density of European red mite at two of investigated technologies – Integrated and biological are reported in this article. It was established that after 12 years application of integrated and biological technology the key disease of apple at two growing systems was powdery mildew P. leucotricha. The difference between density of European red mite, Panonychus ulmi and species of family Phytoseiidae at two technologies was found out. The results related to the susceptibility of experimental cultivars to powdery mildew and European red mite are reported too.

Keywords: apple; growing systems; Panonychus ulmi; Podosphaera leucotricha

Date published: 2017-07-25