Мониторинг энтомо-фитопатологического состояния древесных раcтений Главного ботанического сада РАН

Monitoring of species of plant pathogens and pests had shown that the greatest damage to the collections of woody plants in the MBG, RAS (Moscow) is damaged by roots and stems rots, stem pests and invaydery insects. Heterobasidion s.l. was found on the species of Picea A. Dietr., Larix Mill., Abies Mill. and Juniperus L. The disease weakened trees, and led to the colonization of stem pests, death of some species of collections. The species of Picea abies 'Virgata', P. alcoquiana (Veitch ex Lindl.) Carriere, P. koyamai Shiras, P. omorica 'Borealis', P. orientalis (L.) Link. were resistanced to Ips typographus L. in MBG. Abies arizonica Merriam., A. balsamea (L.) Mill., A. fraseri (Pursh.) Poir., A. lasiocarpa (Hook) Nutt., A. sibirica Ledeb., A. veitchii Lindl. were damaged by Polygraphus proximus Blandf. and Grosmannia aoshimae (Ohtaka, Masuya & Yamaoka) Masuya & Yamaoka. A. alba Mill., A. excelsior Franco, A. holophylla Maxim., A. homolepis Siebold et Zucc., A. koreana Wils., A. nordmanniana (Stev.) Spach., and A. semenovii Fedtsch. were resistant species at this stage [1]. Damage to the collection of ash was caused Agrillus planipennis Fairmaire. From 70 to 100% of the trees of the European and American species of ash trees were killed. Dead trees of Asian species F. mandshurica Rupr. and F. chinensis Roxb. [= F. rhynchophyla Hance] did not carry any trace of A. planipennis infestation [2]. Reducing of number of other groups of pestswere noted compared to the 2013 year. The species of Taxus L. actively was damaged by Parthenolecanium pomeraricum (Kawecki). Diseases: leaf spots, powdery mildew, Schutte, necrotic-cancers and rotswere widespread each year, however, the degree of damage was usually mild ormoderate, rarely severe. Brown spot and rust were the main diseases of leaves of Populus L. species [3]. 10 species of plant pathogens and 7 species of pests were identified on 26 taxa of juniper [4]. A dangerous disease of pine needles Sphaeropsis sapinea (Fr.) Duko & B. Sutton [= Diplodia pinea (Desm.) J. Kickx. f.] wasmarked in MBG the first time.