Biological and economic evaluation of AMISTAR Gold fungicide against sunflower rust in the Lower Volga region

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Abstract

Rust is one of the most economically important foliar diseases of sunflower. The problem of sunflower disease control was considered. The article presents the results of a two-year experiment studying the efficiency of AMISTAR® Gold fungicide, concentrated suspension (active ingredient: Azoxystrobin 125 g/L, Difenoconazole 125 g/L) in sunflower hybrids in the Lower Volga region. Flowerbud development stage was the best application timing for increasing productivity. Therefore, sunflower yield averaged 3…4 c/ha. The biological efficiency of the fungicide ranged from 85 to 90 %. The calculation of economic efficiency showed 145…255 % profitability depending on the year.

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Table 1. Development and spread of sunflower rust (Puccinia helianthi Schw.)  and biological efficiency of the fungicide

Disease symptoms

Variants

AMISTAR Gold, SC

AMISTAR Gold, SC

Control

Alkantara

SI Rozeta KLP

Alkantara

SI Rozeta KLP

Before application

28 days after application

Before application

28 days after application

After 28 days

After 28 days

2020

Development,%

1.4

0.5

3.6

1.1

11.3

14.2

Prevalence,%

34.3

9.4

43.7

12.5

87.1

94.4

Biological efficiency,%

—

89.2

—

86.8

—

—

2021

Development,%

5.1

1.6

9.8

3.5

21.1

23.9

Prevalence,%

52.4

12.3

73.4

14.9

100

100

Biological efficiency,%

—

87.7

—

85.1

—

—

 

Table 2. Average yield and economic efficiency of AMISTAR Gold fungicide application

Hybrid

Yield at standard moisture content (7 %), c/ha

Yield, c/ha

Value of crop including cost of fungicide and treating, rubles/ha

Economic efficiency of fungicide application,%

Control (untreated)

AMISTAR Gold 1 L/ha

2020

Alkantara

26.70

30.95

4.25

9 156

254.8

SI Rozeta KLP

24.57

27.75

3.18

5 946

165.4

2021

Alkantara

20.37

23.63

3.26

6 186

172.1

SI Rozeta KLP

19.92

22.86

2.94

5 226

145.4

 

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About the authors

Denis I. Parpura

Russian Peoples’ Friendship University

Author for correspondence.
Email: 1032163741@rudn.ru

post-graduate student, Agrobiotechnological Department

6 Miklukho-Maklaya st., Moscow, 117198, Russian Federation

Anton I. Sidortsov

Saratov State Vavilov Agrarian University

Email: 1032163741@rudn.ru

student, Faculty of Agronomy

1 Teatralnaya ploshchad, Saratov, 410012, Russian Federation

Gaik P. Atmachyan

Russian Peoples’ Friendship University

Email: atmachiangp@rudn.ru

Post-graduate student, Agrobiotechnological Department

6 Miklukho-Maklaya st., Moscow, 117198, Russian Federation

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Copyright (c) 2021 Parpura D.I., Sidortsov A.I., Atmachyan G.P.

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