Agrarian
Bulletin
of the Urals

Russian Journal of Agricultural Research

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ISSN 2307-0005 (Online)
Key title: Agrarnyj vestnik Urala (Online)
Abbreviated key title: Agrar. vestn. Urala (Online)

Аграрный вестник Урала № 09 (163) 2017

Биология и биотехнологии

Немченко В. В. Доктор сельскохозяйственных наук, профессор, главный научный сотрудник

Кекало А. Ю. кандидат сельскохозяйственных наук, ведущий научный сотрудник Курганский научно-исследовательский институт сельского хозяйства

Нестерова Е. В. кандидат сельскохозяйственных наук, ведущий научный сотрудник. Курганский научно-исследовательский институт сельского хозяйства

УДК:632.4:632.914

INFLUENCE OF WEATHER CONDITIONS DURING THE INTERPHASE PERIODS OF VEGETATION ON DEVELOPMENT OF LEAF DISEASES IN SPRING-SOWN WHEAT

 For operational protective measures against foliar diseases of spring wheat is important for their timely prediction. Most

important in this case are the factors of heat and humidity of the growing season. The article presents the results of researches

of influence of weather conditions the interphase periods of the growing season of spring wheat on development of leaf diseases

under different sowing time in the Central zone of the Kurgan region. Positive correlation with precipitation and negative –

with the average daily air temperature were established. The development of brown rust was in close linkage with the amount

of precipitation and hydrothermal coefficient the interphase period out in the tube to the earing (r = 0.51). The development of

powdery mildew intensified with increasing amount of precipitation and SCC in the period from the earing to the flowering

(r = 0.54). When sown at different periods the influence of weather factors differed. The development of brown rust with late

planting have increased with the increase in precipitation during periods from the tillering before flowering (r = from 0.44 to

0.81). Lowering the temperature had an impact on strengthening the development of the disease with early sowing date in the

period prior flowering (r = -0.50), with late planting in the period from the shooting of the flag leaf (r = -0.52). The development

of powdery mildew was in close positive dependence relationship with precipitation and negative with temperature in the time

from tillering up to flag-leaf and from earing to the flowering, with late planting. This causes the maximal manifestation of the

disease in these phases and at this sowing date. With early sowing of significant relationship of disease development rainfall

and temperature are not set, the plants of spring wheat at this period had much less powdery mildew. The obtained data can be

used to predict the development of the leaf diseases spring wheat.


Keywords:

Keywords: brown rust, powdery mildew, spring wheat, weather conditions, prediction of diseases, monitoring.


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