Criteria for Decision Making and Economic Threshold Level for Wild Radish in Wheat Crop

Tavares, Lizandro Ciciliano; Lemes, Elisa Souza; Ruchel, Q.; Westendorff, N.R.; Agostinetto, Dirceu

doi:10.1590/s0100-83582019370100004

Cited by 16 publications

(82 citation statements)

References 20 publications

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“…Different i values were observed for the soybean cultivars for the tested explanatory variables (table 1, page 99). Other studies have also compared the competitiveness of corn cultivars (3), soybeans (18), rice (18), beans (21), and wheat (30). The comparison between the soybean cultivars in terms of explanatory variables (PD, LA, SC, and DM) showed that the order of competitiveness was NA 5909 RG IPRO > NS 6909 IPRO > Brasmax Lança IPRO > DM 5958 RSF > Brasmax Elite IPRO > SYN 13561 IPRO (table 1, page 99).…”

Section: Competitive Ability Of Soybean Cultivars With Arrowleaf Sidamentioning

confidence: 99%

Interference and threshold level of Sida rhombifolia in transgenic soybean cultivars

et al. 2022

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This study aimed to assess the interference and threshold level (TL) of Sida rhombifolia, the arrowleaf sida, competing with different soybean cultivars. The treatments comprised different soybean cultivars (NS 6909, NA 5909, DM 5958, Brasmax ELITE, Brasmax LANÇA, and SYN 13561) and densities of arrowleaf sida plants per square meter (m-2) (0, 2, 3, 4, 9, 15, 16, 23, 22, and 58; 0, 2, 3, 3, 6, 6, 10, 11, 18, and 47; 0, 3, 4, 7, 8, 10, 11, 13, 15, and 24; 0, 1, 4, 6, 12, 18, 19, 31, 44, and 50; 0, 4, 5, 6, 9, 13, 17, 20, 20, and 47; 0, 2, 3, 5, 9, 11, 15, 18, 29, and 30, respectively) for each cultivar. Cultivars NS 6909, NA 5909, and Brasmax Lança were more competitive than DM 5958, Brasmax Elite, and SYN 13561. The TL values varied from 0.55 to 0.95 plants m-2 for cultivars NS 6909, NA 5909, and Brasmax Lança, which exhibited greater competitiveness with arrowleaf sida. The lowest values of TL varied from 0.26 to 0.61 plants m-2 for cultivars DM 5958, Brasmax Elite, and SYN 13561, which had less competitiveness with weed. Highlights The rectangular hyperbola model adequately estimates the grain yield losses of soybean cultivars. The density of arrowleaf sida plants was the variable that best fitted the rectangular hyperbola model. Soybean cultivars NS 6909 IPRO, NA 5909 RG, and Brasmax Lança IPRO are the most competitive in the presence of arrowleaf sida. The levels of economic damage decrease with the increase in grain yield, in the soybean price, with the reduction in the cost of controlling arrowleaf sida and the herbicide efficiency.

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Section: Competitive Ability Of Soybean Cultivars With Arrowleaf Sidamentioning

confidence: 99%

Interference and threshold level of Sida rhombifolia in transgenic soybean cultivars

et al. 2022

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“…Frandaloso et al (2019) também observaram que o efeito da competição interespecíficas foi mais prejudicial do que a intraespefica ao trabalharem com milho na presença do e21101 SAS, 2(1):e21101, 2021 papuã. Zanine; Santos, (2004) descrevem que a redução no crescimento de espécies, envolvidas em combinações intra ou interespecíficas, resulta da competição espacial entre grupos de plantas que ocupam o mesmo espaço.Outros trabalhos envolvendo diferentes espécies de plantas em competição também denotaram efeitos similares aos constatados no presente estudo, como trigo na presença de nabo(TAVARES et al, 2019), arroz em competição com capim-arroz(GALON;AGOSTINETTO, 2009), arroz e soja x milhã(AGOSTINETTO et al, 2013), trigo x nabo (COSTA; RIZZARDI, 2015) e soja x plantas daninhas(FORTE et al, 2017).…”

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Competição entre híbridos de milho com plantas daninhas

Galon

Gabiatti

Agazzi³

et al. 2020

SAS

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As plantas daninhas Digitaria ciliaris (milhã) e Ipomoea indivisa (corda-de-viola) destacam-se por ocasionarem elevados prejuízos à cultura do milho. Objetivou-se com o trabalho avaliar a interação competitiva relativa entre híbridos de milho na presença de milhã e corda-de-viola, por meio de experimentos em série substitutiva. Os experimentos foram instalados em delineamento experimental de blocos casualizados, com quatro repetições. Primeiramente, tanto para os híbridos de milho (Agroeste - AS 1551 PRO 2, Morgan - MG 300 PW, Nidera - NS 92 PRO and Syngenta - Velox TL) quanto para as plantas daninhas (milhã e corda-de-viola) determinou-se a densidade de plantas em que a produção final se tornou constante (20 plantas vaso-1 ou 463 plantas m-2). Posteriormente foram instalados oito experimentos para avaliar a habilidade competitiva dos híbridos de milho com as plantas daninhas, ambos conduzidos em série de substituição, nas diferentes combinações das espécies, variando-se as proporções relativas (100:0, 75:25, 50:50, 25:75 e 0:100%) de plantas vaso-1 (20:0; 15:5; 10:10; 5:15 e 0:20). A análise da competitividade das espécies foi efetuada por meio de diagramas aplicados a experimentos substitutivos e também pelos índices de competitividade relativa. Aos 50 dias após a emergência das espécies efetuou-se a aferição da área foliar e da massa seca da parte aérea das plantas. Os híbridos de milho e as plantas daninhas foram afetados negativamente, sendo a competição interespecífica a mais prejudicial para as espécies. A cultura apresentou os maiores índices de competitividade, de crescimento, de dominância e de agressividade. Ao se comparar as espécies entre si, o milho foi mais competitivo do que as plantas daninhas.

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“…In the Horro district especially the study area, wild radish was introduced for a long list of about more than 30 years because it is obvious, the seed dormancy assists the survival of plants in several ways; including ensuring the persistence of species in risky environments, enabling germination to agree with the season most favorable for plant growth and interacting with other life cycle traits in helping the plant to maintain itself [33], and it is the most persisted weed species in this area in various land use types because it is one of the most problematic and competitive [25,2,9] reports. Plant attributes particularly important to weeds include adaptations for effective seed dispersal, seed dormancy, long-lived seed bank, rapid growth, and phenotypic plasticity [4].…”

Section: Discussionmentioning

confidence: 99%

Population Distribution of Wild Radish (Raphanus Raphanistrum L.) Weed and Soil Depth of Seed Bank Across Different Land-Use Types in Horro District, Western Oromia, Ethiopia

Shone¹,

Wakoya²,

Jaleta³

et al. 2021

Preprint

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Background: Wild radish (Raphanus raphanistrum L.) is an invasive weed in Ethiopia and hurting different land use types in the Horro district of the study area and fact, more research has not been done yet on the weed is highly infested and persisted for three decades. Therefore, this study was conducted to assess the weeds flora and seed bank status across different land use types in the Horro district of western Oromia, Ethiopia. Three locations and from each location five different land use were purposively selected and a 1m2 area of quadratic sampling techniques was used to record weed flora. From each quadrat, soil samples were taken having two soil depth levels (0-15cm and >15-30cm) to evaluate the soil seed bank of weeds. Results: The data of wild radish weed in different location and different land use types both field survey and greenhouse experiments were found a statistically significant difference (p<0.05) among the target action of land use types but there was found no significant difference among soil depths. More all less, the highest wild radish population was recorded from grazing land land followed by wheat crop land and among the locations, Gitilo Dale has the highest weed density. Among the weed flora, again wild radish was highly dominated weed species than the other weed species in all land use types and locations. From soil seed bank status of soil depth, high weed population was recorded at 0-16cm of second season weed emergence from pot and Gitilo Dale was the highest infected location at this season, while barley crop land was the highest infected among land use types in first season of weed emergence from pot. Among the weed species were recorded from soil depth, again wild radish was highly dominated in both seasons. The population of weed flora per quadrat was directly proportion with population recorded from soil depth that emerged from pot. Conclusions: This study has highly verified that this area has highly infected by wald radish (Raphanus raphanistrum) and there could be a source of weed seed. Generally, the concerned bodies should have to be given attention which should need immediate intervention strategies to mitigate the negative impacts of weed otherwise the area will be out of production soon. Therefore, an extensive integrated weed management strategies should be applied in all phases of cropping systems to sustain environment and reduce this weed in the future.

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Criteria for Decision Making and Economic Threshold Level for Wild Radish in Wheat Crop

Cited by 16 publications

References 20 publications

Interference and threshold level of Sida rhombifolia in transgenic soybean cultivars

Interference and threshold level of Sida rhombifolia in transgenic soybean cultivars

Competição entre híbridos de milho com plantas daninhas

Population Distribution of Wild Radish (Raphanus Raphanistrum L.) Weed and Soil Depth of Seed Bank Across Different Land-Use Types in Horro District, Western Oromia, Ethiopia

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