Open AccessDAMAGE OF APPLE-TREE VARIETIES AND FORMS BY GREEN APPLE APHID IN THE REPUBLIC OF TATARSTAN
Author(s) -
Геннадий Осипов,
Gennadiy Osipov,
З. А. Осипова,
Z. A. Osipova
Publication year - 2019
Publication title -
vestnik kazanskogo gosudarstvennogo agrarnogo universiteta
Language(s) - English
Resource type - Journals
ISSN - 2073-0462
DOI - 10.12737/article_5d3e15bc2d10e8.18691971
Subject(s) - aphid , shoot , biology , horticulture , cultivar , botany , agronomy
The paper includes an assessment of damageability of varieties and forms of apple by green apple aphids in the Republic of Tatarstan. An insignificant variability of damageability of leaves and annual shoots of green aphids was established by year in one half of the studied apple varieties and the average variability - in the second half of the varieties. An insignificant positive correlation is established between the degree of damage to the leaves and shoots of green apple aphids and damage to the leaves by the scab (r = 0.85), the hydrothermal coefficient of the vegetation (r = 0.78) and summer periods (r = 0.68), the amount of precipitation the summer period (r = 0.70), the average temperature in the summer period (r = 0.57) and the average temperature in April (r = 0.64). An insignificant negative correlation was found between the degree of damage to varieties and forms of apple trees by aphids and the amount of precipitation in April (r = –0.14). The manifestation of the sign “damaging the leaves and shoots of green apple aphids” is more influenced by the conditions of the year than the genotype of varieties, forms and the interaction of the genotype with the conditions of the year. The varieties Renet Povolzhya, Kamskaya and Komsin are distinguished according resistance to green apple aphid.