Plant Protect. Sci., 2018, 54(1):60-66 | DOI: 10.17221/92/2016-PPS

Base temperatures for germination of selected weed species in IranOriginal Paper

Donato Loddo*,1, Farshid Ghaderi-Far2, Zahra Rastegar2, Roberta Masin3
1 Institute of Agro-Environmental and Forest Biology, CNR, Legnaro (PD), Italy
2 Department of Agronomy, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran
3 Department of Agronomy, Food, Natural Resources, Animals &
2 Environment, University of Padova, Legnaro (PD), Italy

Weed emergence models require the estimation of base temperature for germination (Tb) that was estimated for Abutilon theophrasti, Echinochloa crus-galli, Amaranthus retroflexus, Sorghum halepense, Amaranthus albus, and Amaranthus hybridus in Iran, to calibrate an existing model called AlertInf. Two statistical procedures were adopted: Model 1 ‒ linear regression of germination rate and Model 2 - probit analysis. Model 1 provided lower Tb values. Abutilon theophrasti and A. hybridus presented lower Tb values (about 4 and 8°C), while the remaining species had values above 10°C. Since the estimated values of Tb were in agreement with those adopted for the Alertinf model in Italy, the first step was achieved to adapt AlertInf to Iranian conditions.

Keywords: Abutilon theophrasti; Amaranthus retroflexus; Amaranthus albus; Amaranthus hybridus; Echinochloa crus-galli; emergence model; population variability; Sorghum halepense

Published: March 31, 2018  Show citation

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Loddo D, Ghaderi-Far F, Rastegar Z, Masin R. Base temperatures for germination of selected weed species in Iran. Plant Protect. Sci. 2018;54(1):60-66. doi: 10.17221/92/2016-PPS.
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