Studies on maize inbred lines susceptibility to herbicides

Abstract

This paper presents the analysis of results obtained during long- term studies on the response of maize inbred lines to herbicides. Under the agroecological conditions of Zemun Polje the response (reaction of maize inbred lines to herbicides of different classes was investigated. Biological tests were performed and some agronomic, morphological, physiological and biochemical parameters were determined when the response of maize inbred lines to herbicides was estimated. The use of active ingredients of herbicides from triazine, acetanilide, thiocarbamate to new chemical groups (sulfonylurea etc.), have been resulted in changes in weed suppression and susceptibility of inbred lines. Obtained results show that effects of herbicides on susceptible maize genotypes can be different: they can slowdown the growth and development and affect the plant height; they can also affect the stages of the tassel and ear development and at the end they can reduced grain yield of the tested inbreds. Numerous studies confirmed the existence of differences in susceptibility level of maize genotypes in relation to herbicides. According to gained results the recommendations for growers are made on the possibility of the application of new herbicides in the hybrid seed production

Reaction of susceptible maize inbred lines to herbicides

“…The highest average yield was obtained by ZPP608-2/11112111k after application of herbicide tembotrione+isoxadifen-ethyl while ZPT165b had the lowest yield values in 2015, mainly in H1 treatment. STEFANOVIĆ et al (2007) and STEFANOVIĆ et al (2010) underlined that expression of maize line susceptibility lays mainly in genotype characteristics and meteorological conditions. Particular attention was given to sulfonylureas which could seriously affect maize growth, leading to the yield lack BRANKOV et al, 2015).…”

“…It is well known that maize production is inconceivable without herbicide application, and significantly depends on crop susceptibility. Some injuries could be induced by herbicides, what could result in yield losses (STEFANOVIĆ et al, 2007;STEFANOVIĆ et al, 2010;TESFAY et al, 2014). SUBEDI and MA (2009) emphasized that weed infestation is the most important yield-limiting factor, reducing grain yield by 27-38%, so weed control is one of the most important measures in the whole cropping technology.…”

Integrated effects of herbicides and foliar fertilizer on corn inbred line

“…Winter wheat was previous crop. The tested inbred line was selected based on previous research (Stefanovic et al, 2010) regarding lines sensitivity to various herbicides. The line belongs to the early maturity group, with mainly pronounced susceptibility to various stressful factors.…”

“…Corn inbred lines are homozygous, and due to inbreeding, they have lower vigour and slower growth and development. These factors can lead to increase sensitivity to various biotic and abiotic factors, including herbicides (Stefanovic et al, 2010). In general, corn lines are more sensitive to herbicides than hybrids, meaning lack of herbicide selectivity can be a limiting factor for their application.…”

“…Herbicides can cause visible plant damages or slow down plant development leading to decrease grain yield. In Serbia, Stefanovic et al (2010) reported several problems with herbicide selectivity, especially in seed corn production, such as significant injuries, caused by post-emergence herbicides, mainly sulfonylureas. Brankov et al (2015) also showed that sulfonylurea herbicides caused significant visible damages and reduced growth parameters in corn inbred lines, while triketons (bleaching herbicides, 4-hydroxyphenylpyruvate dioxygenase [HPPD] inhibitors) expressed higher selectivity.…”