The influence of the spraying pressure of an injector asymmetric double nozzle with variable flow on head fungicide coverage, yield, grain quality, and deoxynivalenol content in winter wheat

Vučajnk, Filip (author), Trdan, Stanislav (author), Košir, Iztok Jože (author), Ocvirk, Miha (author), Šantić, Mihovil (author), Žerjav, Metka (author), Šantavec, Igor (author), Bernik, Rajko (author), Vidrih, Matej (author)

Spraying parameters are important factors when spraying wheat heads against fusarium head blight (FHB) to control the deoxynivalenol level in the grain and to obtain high and quality yields. In 2019 and 2020, field trials were conducted in order to establish the effect of the spraying pressure (2 bar, 4 bar, and 6 bar) of special nozzles with a variable flow rate Agrotop VR 1.5 on the head fungicide coverage, yield parameters, and the deoxynivalenol (DON) value in the grain. The coverage of the front and rear sides of wheat heads increased with the increase of spraying pressure from 2 to 6 bar. In 2019, when the infection with FHB was more severe, no significant differences appeared in the yield and the hectoliter weight at a lower spraying pressure, while the DON value at this pressure approached the maximum permissible level. In that year, the DON value exponentially fell with the increase of spraying pressure. In 2019, the thousand grain weight was higher at the spraying pressure of 6 bar than at the pressures of 2 and 4 bar. The results show that also a lower spraying pressure (2 bar) and a volume application rate (117 L/ha) below the recommended one suffice to retain the DON value in the grain below the maximum permissible level, even in years with more severe infection.

• Language: English
• Keywords: fusarium head blight, F. graminearum, nozzles, DON, yield, grain quality, spraying pressure
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: 17 str.
• Numbering: Vol. 11, iss. 1, art. 43
• PID: 20.500.12556/RUL-134802
• UDC: 631
• ISSN on article: 2073-4395
• DOI: 10.3390/agronomy11010043
• COBISS.SI-ID: 44635395
• Publication date in RUL: 02.02.2022

Record is a part of a journal

• Title: Agronomy
• Shortened title: Agronomy
• Publisher: MDPI
• ISSN: 2073-4395
• COBISS.SI-ID: 522953241

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 01.01.2021

Secondary language

• Language: Slovenian
• Keywords: varstvo rastlin, škropljenje, tlak pršenja, Fusarium graminearum, ozimna pšenica, pridelek, šobe, kakovost pridelka

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P4-0092
• Name: Zdravje živali, okolje in varna hrana