Express method of accounting and forecasting brown-tail moth (Euproktis chrisorrhoea l.) in forest and garden plantations

  • Vladimir Viktorovich Dubrovin Saratov State Agrarian University named after N.I. Vavilov
  • Viktor Evgenievich Mladentsev Saratov State Agrarian University named after N.I. Vavilov
Keywords: brown-tail moth, winter nests, express accounting method, forecast

Abstract

The biological peculiarities of brown-tail moth, a dangerous pest of many tree and garden plantings, were studied
in order to develop a rapid method for obtaining sufficiently
fast and reliable accounting and forecasting data. A comparative description of the existing methods of accounting of
brown-tail moth in forest plantations and in garden ones has
been carried out. It has been established that the accounting methods adopted in production are devoid of statistical
justification and data on the size and number of accounting
units. It is shown that the most informative indicator for obtaining data on the population of stands is the development
of phytophage at the caterpillar phase in winter nests. Mass
counts of winter nests with a simultaneous estimate of the
number of caterpillars in them and the degree of nibbling
of plantations made it possible to identify the relationship
between these values. Tables for quick determination of the
required sample size with three levels of accuracy are developed. A table establishing the number of pest larvae depending on the size of wintering nests has been developed. A
model that allows predicting the degree of expected damage
to plantings by a pest has been obtained.

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Author Biographies

Vladimir Viktorovich Dubrovin, Saratov State Agrarian University named after N.I. Vavilov

Doctor of Biological Sciences, Professor

Viktor Evgenievich Mladentsev, Saratov State Agrarian University named after N.I. Vavilov

Post-graduate Student

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Published
2019-05-28
Section
Agronomy