The effect of the Pharmaiod preparation in the virus elimination of pear plants using the thermotherapy method

Currently, the main methods of virus elimination fruit crops are dry-air thermotherapy, meristem culture and chemotherapy. The use a complex physical chemical makes it possible to increase efficiency elimination. Improving recovery must be carried out in relation certain types viruses, biological characteristics crop variety. purpose research is study effect Pharmaiod preparation on biometric, physiological parameters release harmful viruses-free pear plants process thermotherapy. Improvement varieties Letnyaya Zabava, Zolotoy Vityaz, hybrids R-11-9, R-10-3 R-2-4 from latent viruses Apple stem grooving (ASGV), pitting (ASPV), chlorotic leaf spot (ACLSV), mosaic (ApMV) were 2020-2021 at temperature 38 °C for 3 months using thermal chamber designed by Federal Horticultural Research Centеr Breeding, Agrotechnology Nursery. Biometric depended varietal characteristics, duration therapy concentration preparation. In most forms studied, after 1 ml/l contributed an length shoot 1.4-3.1 times compared with control. Under conditions chamber, according set indicators, R-11-9 characterized highest heat resistance; medium resistance was shown Zabava Vityaz varieties; low – hybrid. Higher heat-resistant more restrained growth shoots lower ones. An average negative significant correlation 5% significance level established between water content leaves (r = -0.52). yield virus-free type virus. free 4 major as result thermotherapy without 50 %, drug 60 %.