Naslov
Herbicide resistant weeds and alternative control measures in Yugoslavia

Autori
Arsenović, Marija ; Ostojić, Zvonimir ; Klokočar Smit, Zlata

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, ostalo

Izvornik
Herbicide resistance in weeds and crops / Caseley, J. C. ; Cussans, G. W. ; Atkin, R. K. - Boston (MA) : Butterworth-Heinemann, 1989, 418-419

ISBN
0750611014

Skup
11th Long Ashton International Symposium

Mjesto i datum
Bristol, Ujedinjeno Kraljevstvo, 11.09.1989. - 14.09.1989

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
herbicides ; resistance ; weeds

Sažetak
Regular yearly application of herbicides with the same or similar site of action has induced the appearance and propagation of resistant weed biotypes. The phenomenon of resistance have been detected in different parts of the world in some 100 species. The appearance of resistance to triazine in Yugoslavia was first noticed in 1981 in maize grown in monoculture in S. R. Hrvatska where atrazine and simazine had beeb used repeatedly. Tests revealed the high tolerance of the Chenopodium album to atrazine, simazine and prometryne. For the total weed eradication on the non-cropped areas, high dosages of triazine herbicides have been used regulary. The resistant biotypes of Amaranthus retroflexus and Erigeron canadensis were detected on such sites as canal slopes and railway tracks. The biotest in the chernozem soil was done with different concentrations of atrazine under controlled conditions. Seeds of A. retroflexus collected on the sites treated continuously with atrazine and from untreated plots were germinated. The decrease in biomass net weight of young plants derived from the seed of plants suspected of resistance correlated with the increase of the atrazine content in the soil. At the same time, the seed from the susceptible biotype did not grow in soil with atrazine treatments as low as 0.5 kg/ha. Chemical and biological measures were applied to prevent further development of the resistant biotypes. The weeds on non-cropped land werw controlled by applying herbicides different from triazines. To avoid the problems of appearance of atrazine-resistant biotypes of Chenopodium album in corn, reduced doses of triazine herbicide werw combined with pyridate, bentazone, bromoxynil and ICI-0051. The efficacy index ranged from 56.5 to 100%. We have shown that linuron at 0.75 kg a.s. addes to metalachlor or alachlor reduced the expression of resistance. Late treatment with pyridate, bentazone or bromoxynil was also effective. The efficiency of those combinations was confirmed using atrazine plus lower dosages of linuron. The level of resistance of weeds in maize plots, treated in this way, remained the same or slightly increased.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

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