Response of Sorghum halepense L. (Pers.) Populations to Nicosulfuron, Rimsulfuron and Prosulfuron+Primsulfuron-methyl
Reakcije populacija Sorghum halepense L. (Pers.) na nikosulfuron, rimsulfuron i prosulfuron+primisulfuron-metil
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Author
Bozic, Dragana
Elezovic, Ibrahim
Saric, Marija
Onc-Jovanovic, Eleonora
Vrbnicanin, Sava
Keywords
Sorghum halepense L. (Pers.)Populations
Response
Sulfonylureas
populacije
reakcije
sulfoniluree
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Show full item recordAbstract
The effects of herbicides nicosulfuron, rimsulfuron and prosulfuron+primsulfuronmethyl
on eight populations of Sorghum halepense L. (Pers.) under controlled conditions
were investigated. The herbicides were applied at different rates (0x; 0,5x; 1x; 1,5x; 2x; 3x recommended
application rate for field use) when plants reached the height of 20-25 cm. The
parameters measured seven days after treatment were leaf surface and fresh and dry mass
of plants; the obtained results were then used for ED50 calculations.
The response of Sorghum halepense populations to nicosulfuron, rimsulfuron and
prosulfuron+primsulfuron-methyl varied from population to population, and depending
on the applied rate and the measured parameter. Resistance development was not
observed in any of the populations that survived herbicide treatment before seed collecting.
Only the population P2 showed somewhat decreased susceptibility to nicosulfuron,
which can be regarded as an early stage of resistance development. Ispitivane su reakcije 8 populacija vrste Sorghum halepense L. (Pers.) na herbicide nikosulfuron,
rimsulfuron i prosulfuron+primisulfuron-metil u kontrolisanim uslovima. Primena
različitih količina (0x; 0,5x; 1x; 1,5x; 2x; 3x od količine koja je preporučena za primenu u poljskim
uslovima) ovih herbicida izvedena je kada su biljke bile visine 20-25 cm. Sedam dana
nakon primene herbicida mereni su sledeći parametri: površina listova, sveža i suva masa
biljaka, a na osnovu dobijenih rezultata su određene ED50 vrednosti.
Reakcije populacija S. halepense na nikosulfuron, rimsulfuron i prosulfuron+primisulfuronmetil
su bile različite u zavisnosti od populacije, količine primene herbicida i ispitivanog parametra.
Nijedna od populacija koja je pre sakupljanja semena preživela primenu navedenih
herbicida nije razvila rezistentnost. Samo je kod populacije P2 potvrđena smanjena
osetljivost na nikosulfuron, koja se može smatrati početkom razvoja rezistentnosti.