Estimating Time of Weed Emergence in Cucumber (Cucumis sativus L.)

Nihat Tursun, İrfan Ersin Akıncı, Mustafa Şahin, Ahmet Uludağ

Abstract


Modelling is carried out for eleven major weeds in cucumber to develop estimated models for weed emergence time. Weed species were grouped according to their emergence patterns. Amaranthus retroflexus, Chenopodium album, Heliotropium europaeum, Polygonum aviculare and Solanum nigrum were early emerging, Convolvulus arvensis, Cyperus rotundus, Cynodon dactylon, Portulaca oleracea and Sorghum halepense were season long emerging Tribulus terrestris was the late emerging weed species. Different non-linear growth curves (Chapman-Richard, Weibull, logistic, Gompertz and cubic spline) fitted to the data of cumulative percent emergence for the different species and years. Cubic spline seemed the best model for many species.

Keywords


Cucumber; Emergence model ERI; MET; Growing degree days (GDD); Weeds

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DOI: https://doi.org/10.24925/turjaf.v3i5.271-278.268

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This work is licensed under Creative Commons Attribution 4.0 International License

ISSN: 2148-127X

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