Variability of maize genotypes in the expression of tolerance to European corn borer (Ostrinia nubilalis Hbn.)
Author:
Gosic-Dondo Snezana1, Srdic Jelena1, Dragicevic Vesna1, Popovic Zeljko2, Ristic Danijela1, Brankovic Dragana1, Grcak Dragan3
Affiliation:
1. Maize Research Institute, Zemun Polje, Belgrade 2. University of Novi Sad, Faculty of Science Novi Sad, Serbia 3. University of Priština, Faculty of Agriculture, Kosovska Mitrovica - Lešak, Lešak, Serbia
Abstract
The backbone of modern technologies is the creation of tolerant genotypes at
the ECB with special emphasis on the interaction between the degree of plant
damage and metabolic processes as potential responses to stress. During the
vegetation period of 2016 and 2018, the variability and response of four
maize genotypes to the effectiveness of insecticides and bioinsecticides and
the interdependence with the dynamics of the ECB population were examined.
Out of a total of 11,023 attacked plants in both years of the survey, in
2016 the largest number of plants (4,841) with a broken stalk above the ear
and at the height of the ear and belonged to categories C3 to C8. In 2018,
there was no damage to the tassel and ear, while 3,672 plants were dominated
by leaf damage and perforation in the H2 type. In addition to the fact that
more infested plants were observed in the genotypes, ZP 434 and ZP 666 the
categories of damage type C5, C6 and C7 were more pronounced. The foliar
treatment of plants with chlorantraniliprole in two-year research proved to
be the most effective with the least number of attacked plants with a high
degree of damage. In contrast, bioinsecticide treatment of plants, in
addition to a large number of infested plants, was dominated by high
categories of damage that deviated from all other treatments as well as from
control. Within the definition of the degree of tolerance of maize
genotypes, the influence of treatment on changes in secondary metabolites
(phytins) in seeds was observed. It was noticed that there is a trend of
positive correlation between the amount of phytin in the seed (mg g-1) with
the attack of moths of the first generation and the number of dissected
larvae, as well as a trend of negative correlation with the percentage of
attacks of the second generation. Correlation coefficients are expressed: in
the genotype ZP-600, while in the genotype ZP-666 correlation is the lowest,
ie. irrelev?nt. The obtained results may be of great importance in future
work aimed at the selection of maize genotypes tolerant and resistant to
corn borer attack, connected to the role of phytin, as an antioxidant and
phosphorus deposited in corn grain.
Funder
Ministry of Education, Science and Technological Development of the Republic of Serbia
Publisher
National Library of Serbia
Subject
Plant Science,Genetics
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