Research Article

Critical Period for Weed control in Sunflower and Effects of Applications on Weed Species and Diversity

Volume: 25 Number: 6 December 30, 2022
TR EN

Critical Period for Weed control in Sunflower and Effects of Applications on Weed Species and Diversity

Abstract

This study was carried out under field conditions in Adana, Turkey in 2018 and 2019 to determine the critical period for weed control in sunflower depending on the daily growth temperature (GDD) and weed species. A log-logistic model with four parameters was used to determine the relationship between relative crop yield and both increased weed intervention time and length of weed-free periods. In addition, dominant weeds and weed densities were determined in the experimental area. Data obtained from different periods of weed intervention were compared with data obtained from seasonal weed-free plots. During the sunflower growing season, 37.4% – 41.04% yield loss was determined in sunflower due to weed competition. For 5% acceptable yield loss in the first year, the critical period in weed control was determined as 243-1181 GDD; this is 24-86 days after the crop emergence (DAE) . It was found between 269 and 1409 GDD (16-72 DAE) in the second year. In sunflower, it was determined that the removal of weeds from the plot in the weed-free period started within 2-3 weeks from the emergence and continued for 10-12 weeks. These findings may help sunflower growers to plan and implement cost-effective and appropriate weed control programs.

Keywords

Supporting Institution

Tarım ve Orman Bakanlığı TAGEM

Project Number

TAGEM/BSAD/16/1/04-02

Thanks

We thank the Ministry of Agriculture and Forestry General Directorate of Agricultural Research and Policies for supporting this study (TAGEM/BSAD/16/1/04-02).

References

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Details

Primary Language

English

Subjects

Agricultural, Veterinary and Food Sciences

Journal Section

Research Article

Publication Date

December 30, 2022

Submission Date

October 4, 2021

Acceptance Date

November 17, 2021

Published in Issue

Year 2022 Volume: 25 Number: 6

APA
Özkil, M., Torun, H., Eymirli, S., Üremiş, İ., Karaman, Y., & Tursun, N. (2022). Critical Period for Weed control in Sunflower and Effects of Applications on Weed Species and Diversity. Kahramanmaraş Sütçü İmam Üniversitesi Tarım Ve Doğa Dergisi, 25(6), 1305-1314. https://doi.org/10.18016/ksutarimdoga.vi.1004638

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