Carryover of Imazethapyr and Imazapic to Nontolerant Rice

Marchesan, Enio; Santos, Fernando Machado dos; Grohs, Mara; Avila, Luis Antônio de; Machado, Sérgio Luiz de Oliveira; Senseman, Scott A.; Massoni, Paulo Fabrício Sachet; Sartori, Gerson Meneghetti Sarzi

doi:10.1614/wt-08-153.1

Cited by 24 publications

(25 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Herbicide injury in early development stages of non-tolerant rice, planted in rotation to the Clearfield system, has been demonstrated in other studies, such as Massoni's et al (2007) and Marchezan's et al (2010), who reported the same herbicide carryover on non-tolerant rice 358 days after application. Other authors also show that this herbicide remains in the soil, and may suppress the seedlings development in non-tolerant cultivars planted in rotation (Noldin et al, 2005;Villa et al, 2006;Kraemer et al, 2009).…”

Section: Resultsmentioning

confidence: 52%

Carryover of Imazethapyr + Imazapic on Ryegrass and Non-tolerant Rice as Affected by Thickness of Soil Profile

et al. 2015

View full text Add to dashboard Cite

-Herbicides used in Clearfield ® rice system may persist in the environment, damaging non-tolerant crops sown in succession and/or rotation. These damages vary according to soil characteristics, climate and soil management. The thickness of the soil profile may affect carryover effect; deeper soils may allow these molecules to leach, reaching areas below the roots absorption zone. The aim of this study was to evaluate the effect of the thickness of soil profile in the carryover of imazethapyr + imazapic on ryegrass and nontolerant rice, sown in succession and rotation to rice, respectively. Lysimeters of different thicknesses (15, 20, 30, 40, 50 and 65 cm) were constructed, where 1 L ha -1 of the imazethapyr + imazapic formulated mixture was applied in tolerant rice. Firstly, imidazolinone-tolerant rice was planted, followed by ryegrass and non-tolerant rice in succession and rotation, respectively. Herbicide injury, height reduction and dry weight of non-tolerant species were assessed. There was no visual symptoms of herbicide injury on ryegrass sown 128 days after the herbicide application; however it causes dry weight mass reduction of plants. The herbicides persist in the soil and cause injury in non-tolerant rice, sown 280 days after application, and the deeper the soil profile, the lower the herbicides injury on irrigated rice.Keywords: degradation, imidazolinone, Lolium multiflorum, leaching, Oryza sativa. (15, 20, 30, 40, 50 RESUMO -Os herbicidas usados na cultura do arroz

show abstract

Section: Resultsmentioning

confidence: 52%

Carryover of Imazethapyr + Imazapic on Ryegrass and Non-tolerant Rice as Affected by Thickness of Soil Profile

et al. 2015

View full text Add to dashboard Cite

show abstract

“…O arroz-vermelho é uma das principais plantas invasoras em áreas produtoras de arroz (NOLDIN et al, 2004), pois interfere no rendimento de grãos e na qualidade do produto (MARCHESAN et al, 2010;, bem como o preço pago pelo produto (GEALY; SALDAIN; TALBERT, 2000).…”

Section: Introductionunclassified

Germinação de arroz irrigado e de biótipos de arroz-vermelho submetidas a diferentes temperaturas

Sartori¹,

Marchesan²,

Azevedo³

et al. 2014

Rev. Ciênc. Agron.

Self Cite

View full text Add to dashboard Cite

RESUMO -O arroz-vermelho é a principal planta daninha do arroz irrigado, pois afeta a produtividade e qualidade. Objetivou-se avaliar a ação de diferentes temperaturas na dinâmica de germinação do genótipo de arroz Puitá INTA CL e de biótipos de arroz-vermelho, com e sem superação da dormência. O trabalho foi realizado em 2011, em câmara B.O.D e Fitotron na Universidade Federal de Santa Maria, Santa Maria -RS. O delineamento foi inteiramente casualizado com quatro repetições. O fator (A) foi composto pelas temperaturas 13; 17; 21 e 25 °C e o fator (D) pela cultivar Puitá INTA CL e três biótipos com e sem dormência. Avaliaram-se os parâmetros: germinação de sementes (GS), índice de velocidade de emergência (IVE), coeficiente de uniformidade de emergência (CUE) e comprimento da parte aérea (CPA). Ocorreu aumento da GS, do IVE, do CUE e do CPA dos biótipos de arroz-vermelho com o aumento da temperatura de 13 °C para 25 °C. Nas temperaturas de 13 e 17 °C o genótipo apresentou germinação 64% maior que a média dos biótipos sem superação da dormência, já aos 21 e 25 °C foi de 11% apenas. Os biótipos apresentaram germinação 56% maior nas temperaturas de 21 e 25 °C, comparado aos 13 e 17 °C. As temperaturas de 13 e 17 °C causam menor germinação de arroz-vermelho sem superação de dormência. Como estratégia de controle de arroz-vermelho em áreas de arroz irrigado, é recomendado priorizar a semeadura do arroz no início da época recomendada (setembro e início de outubro), período em que as temperaturas do ar e do solo são mais baixas. Palavras-chave:Oryza sativa. Germinação. Dormência.ABSTRACT -Red rice is the main weed of the irrigated rice crop because it affects productivity and quality. The object of this study was to evaluate the effect of different temperatures on the germination dynamics of the Puita INTA CL rice genotype, and on red-rice biotypes, both with and without breaking dormancy. The study was carried out in 2011 in a BOD chamber and phytotron of the Federal University of Santa Maria in Santa Maria, Rio Grande do Sul, Brazil. The experimental design was completely randomised, with four replications. Factor (A) consisted of the temperatures 13, 17, 21 and 25 °C, and factor (D) of the Puita INTA CL cultivar and three biotypes, both with and without dormancy. The following parameters were evaluated: seed germination (SG), emergence speed index (ESI), emergence uniformity coefficient (EUC) and length of aerial part (LAP). There was an increase in SG, ESI, EUC and LPA in the red-rice biotypes with the increase in temperature of 13 °C to 25 °C. At temperatures of 13 and 17 °C the genotype showed 64% greater germination than the average of the biotypes without breaking dormancy, whereas at 21 and 25 °C it was only 11%. The biotypes presented 56% greater germination at temperatures of 21 to 25 °C compared to 13 and 17 ºC. Temperatures of 13 and 17 °C cause less germination of red rice without breaking dormancy. As a strategy for controlling red rice in areas of irrigated rice, giving priority to sowing of the rice ea...

show abstract

“…According to Marchesan et al (2010) and Marchesan et al (2011), red rice affects grain yield, the quality of the final product, and the price paid for the product (Gealy et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Effects of irrigated rice sowing season and imazapyr + imazapic time of application on rice grain yield and red rice management

et al. 2013

View full text Add to dashboard Cite

-Irrigated rice sowing season and red rice competition are among the main factors affecting grain yield. The objective of this work was to evaluate the sowing date of irrigated rice and moments of application of the herbicide imazapyr + imazapic to control red rice management and irrigated rice grain yield. Eight experiments were performed at the following dates (09/30, 10/19, 11/08 and 12/01) for the 2010/2011 harvest season and (09/27, 10/17, 11/08 and 12/05) for the 2011/2012 harvest season. The treatments were: application of the herbicide imazapyr + imazapic at doses of 105+35 g ha -1 in pre-emergence (PRE); 52.5+17.5 g ha -1 in pre-emergence and 52.5+17.5 g ha -1 in post-emergence (PRE + POST); and 105+35 g ha -1 in post-emergence (POST), and a control without application and no weeding. The cultivar Puitá Inta CL was used and a randomized block design with four replicates. A joint analysis of the experiments was carried out. There was less emergence of red rice and higher grain yield of the irrigated rice at the early periods (09/30/10 and 09/27/11), with 10,578 and 8,653 kg ha -1 , respectively. At the end of the season (12/01/10 and 12/05/11), there was greater reduction of the red rice seed bank. Sowing at the beginning of the recommended period provided more irrigated rice grain yield. The application of imazapyr + imazapic at a dose of 52.5+17.5 g ha -1 in PRE + 52.5+17.5 g ha -1 POST, and 105+35 g ha -1 only in PRE and POST was effective in the control of red rice.

show abstract

Carryover of Imazethapyr and Imazapic to Nontolerant Rice

Cited by 24 publications

References 14 publications

Carryover of Imazethapyr + Imazapic on Ryegrass and Non-tolerant Rice as Affected by Thickness of Soil Profile

Carryover of Imazethapyr + Imazapic on Ryegrass and Non-tolerant Rice as Affected by Thickness of Soil Profile

Germinação de arroz irrigado e de biótipos de arroz-vermelho submetidas a diferentes temperaturas

Effects of irrigated rice sowing season and imazapyr + imazapic time of application on rice grain yield and red rice management

Contact Info

Product

Resources

About