Miotła zbożowa (Apera spica-venti) jest jednym z najbardziej powszechnych chwastów jednoliściennych pszenicy ozimej w Europie Środkowej. Do tej pory zidentyfikowano odporność tego gatunku na różne herbicydy. Celem badania była ocena wpływu temperatury na wskaźniki kiełkowania nasion siedmiu odpornych biotypów miotły zbożowej (reprezentujących odporność na substancje z 1, 2 i 3 grupy HRAC/WSSA) w porównaniu z dwoma biotypami wrażliwymi. Przeprowadzono dwie serie testów na płytkach Petriego, w trzech stałych temperaturach: 8, 18 i 28°C z fotoperiodem dzień/noc: 10/14 h. Obliczono sześć wskaźników kiełkowania na podstawie codziennych pomiarów. Wyniki badań wykazały, że temperatura wpływała na kiełkowanie wrażliwych i odpornych biotypów A. spica-venti. Kiełkowanie miotły zbożowej przebiegało najlepiej w temperaturach 18 i 28°C, niezależnie od badanego biotypu. Wyniki takie wskazują na podobną reakcję biotypów odpornych i wrażliwych na działanie temperatury w czasie kiełkowania. Nie stwierdzono wyraźnego związku między rodzajem odporności na herbicydy (pojedyncza, krzyżowa oraz wielokrotna), a kiełkowaniem (wyrażonym wskaźnikami kiełkowania) badanych biotypów A. spica-venti.

Silky bentgrass (Apera spica-venti) is one of winter wheat most serious and widespread grass weeds, particularly in Central Europe. Populations of this weed have developed herbicide resistance. This study aimed to assess the effect of temperature on the seed germination indices of seven resistant populations of silky bentgrass biotypes, representing groups 1, 2, and 3, on HRAC/WSSA compared to two susceptible biotypes. Two series of Petri dish experiments were performed at three constant temperatures: 8, 18, and 28°C, with a day/night photoperiod of 10/14 h. Six germination indices were calculated based on daily germination measurements. The results revealed that temperature affects the germination of sensitive and resistant A. spica-venti biotypes. Bentgrass germination occurred best at 18 and 28°C. This finding proves the similarities between resistant and susceptible biotypes in response to temperature. No clear connection was found between the type of herbicide resistance (single, cross or multiple) and the germination (expressed by the germination indices) of the tested A. spica-venti biotypes.

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