Open AccessEffect of post-emergence applications of imazapyr and imazapic on the growth and grain yield of AHAS-transgene soybean plants
Author(s) -
Vinícius Gabriel Caneppele Pereira,
Leandro Paiola Albrecht,
Alfredo Júnior Paiola Albrecht,
Fabio dos Santos Biazoto,
Rogério Kosinski,
Aderlan Ademir Bottcher,
Mateus Dalpubel Mattiuzzi,
Fábio Henrique Krenchinski
Publication year - 2021
Publication title -
australian journal of crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 44
eISSN - 1835-2693
pISSN - 1835-2707
DOI - 10.21475/ajcs.21.15.01.2182
Subject(s) - agronomy , imazapyr , randomized block design , biology , point of delivery , cultivar , glyphosate , crop , chlorophyll , crop yield , weed , grain yield , growing season , yield (engineering) , horticulture , materials science , metallurgy
One of the factors that limit grain yield in soybean crops is weed competition. The objective of the present work was to evaluate the agronomic performance of an AHAS-transgene soybean cultivar (BRS 397; Cultivance®) subjected to different rates of Soyvance® (525 g kg-1 imazapyr, and 175 g kg-1 imazapic). Two field experiments were conducted in the 2015-2016 crop season in two sites with different soil and weather characteristics located in the state of Paraná, Brazil. A completely randomized block design was used, with 11 treatments consisted of different rates of Soyvance®. Phytotoxicity, chlorophyll index, first pod height, plant height, number of pods per plant, 100-seed weight, and grain yield were evaluated. The use of high rates of the herbicide decreased the final height and grain yield of soybean plants in approximately 25% in both locations, but did not affect their 100-seed weight and chlorophyll index. The use of rates of the commercial product higher than that recommended by the manufacturer (100 g ha-1) may affect the agronomic performance of AHAS-transgene soybean plants