HERBOLOGIA - anubih

B. Konstantinović et al.
susceptible to herbicide imazethapyr action, for decay occurred after
application of the second rate of 0.08 kg a.i. imazethapyr/l.
Based upon resistance level obtained by foliage fresh weight
measurement (Table 2), resistance was confirmed for populations from
locality Krivaja (4*), with a slight probability that herbicide showed low
efficiency. For biotype from locality Kikinda an early indication of resistance
was determined, but with a possibility of herbicide efficiency reduction.
Population from locality Becej remained susceptible to the applied herbicide.
Resistance index of all measured parameters (Table 3) suggests that
biotype from the locality Krivaja acquired the highest resistance to the
applied rates of the herbicide imazethapir. Populations from locality Becej
(IR = 0.99 - 1) and Kikinda (IR = 0.53 – 1) showed high susceptibility to
herbicide imazethapyr.
Conclusion
Based upon results of the resistance studies of different populations
of the weed species Amaranthus retroflexus L. to herbicide imazethapyr, it
can be concluded that intensive use of ALS inhibiting herbicides caused
reduced susceptibility of weed species Amaranthus retroflexus L. population
to imazethapyr. The biotype from the site Krivaja showed the highest
resistance to the applied rates of herbicide imazethapyr. Biotype from the
locality Becej showed reduced susceptibility to the applied herbicide (RI =
0.99 – 1.0). The highest susceptibility to the applied rates of the herbicide
imazethapyr was found in the biotype from Kikinda (RI = 0.53 – 1.0).
References
BABCZINSKI, P. (2002): Discovery of the lead structure for propoxycarbazone -sodium (BAY
MKH 6561). Pflanzenschutz-Nachrichten-Bayer 55, p. 5-14.
BECKIE, H.J., HEAP, J.M., SMEDA, R.J., HALL, L.M. (2000): Screening for Herbicide
Resistance in Weeds. Weed Technology, 14, p. 428-445.
CLAY, D.V. & UNDERWOOD, C. (1990): The identification of triazine and paraquat resistant
weed biotypes and their response to other herbicides. Importance and perspectives
on herbicide resistant weeds, Luxemburg. p. 47-55.
GERWICK, C.M., SUBRAMANIAN, M.V. AND LONEY-GALLANT, V.I. (1990): Mechanism of
action of the 1,2,4,-triazolo[1,5-]pyrimidines. Pesticide Science, 29, p. 357-364.
HADŽIVUKOVIĆ, S. (1991): Statistički metodi s primenom u poljoprivrednim i biološkim
istraživanjima. Poljoprivredni fakultet, Novi Sad.
HEAP, I. (2006): International survey of herbicide resistant weeds. Online internet,
www.weedscience.com
KONSANTINOVIĆ, B., MESELDŽIJA, M., ŠUNJKA, D., KONSTANTINOVIĆ, BO. (2003a):
Determination of resistant biotypes of Amaranthus retroflexus L. on ALS inhibitors.
3 rd International Plant Protection Symposium at Debrecen University, Debrecen
Hungary, p. 269-276.
38