Treatment of rice seeds with thiamethoxam: reflections on physiological performance

Almeida, Andréia da Silva; Deuner, Cristiane; Borges, Carolina Terra; Meneghello, Géri Eduardo; Jauer, Adilson; Villela, Francisco Amaral

doi:10.1590/2317-1545v36n4980

Cited by 11 publications

(13 citation statements)

References 6 publications

(11 reference statements)

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“…The taller soybean plants obtained with the thiamethoxam application might be due to the effect of the thiamethoxam molecule, which plays the role of a growth regulator (Macedo & e Castro 2011). Similar results were also found in previous studies, for instance, the seed treatment with thiamethoxam increased the plant height of cotton and okra (Preetha & Stanley 2012), rice (Almeida et al 2014a; Hum- (Almeida et al 2014b). Soybean seed treatment with thiamethoxam also enhanced the seedling vigour (Dhungana et al 2016).…”

Section: Discussionsupporting

confidence: 86%

Comparative effect of different insecticides on the growth and yield of soybeans

Dhungana¹,

Adhikari²,

Adhikari³

et al. 2020

Plant Prot. Sci.

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The yield of soybeans, an economically important crop worldwide, is substantially reduced by different abiotic and biotic factors, including insect pests. Different insecticides are applied to control soybean insect pests. The application of insecticides may also affect the plants along with the pests. The effects of four insecticides (fenitrothion, etofenprox, thiamethoxam, and lambda-cyhalothrin-cum-thiamethoxam; LT) on the growth and yield of two soybean cultivars over two years were investigated. The plant height (PH), pod number, shoot dry matter without seed (SDWS), total shoot dry matter, seed yield per plant (SYP), harvest index (HI), and hundred-seed weight significantly varied with the insecticides. However, the primary branch number was not significantly affected by the insecticides. Significant interactions between the year and insecticide, except for the SDWS and HI, indicated that the growing environment also affected the influence of the insecticides. The PH was significantly tall in the thiamethoxam (50.07 cm) and short for the LT (46.66 cm) application. The SYP was significantly high for the LT (20.51 g) and low for the fenitrothion (11.51 g). This study showed that the type of insecticide could significantly affect the plant growth and yield of the soybean.

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Section: Discussionsupporting

confidence: 86%

Comparative effect of different insecticides on the growth and yield of soybeans

Dhungana¹,

Adhikari²,

Adhikari³

et al. 2020

Plant Prot. Sci.

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“…Maron et al (2011) showed that these fungicides do not affect plant growth and survival, except through their action on pests. Although Thiamethoxam has been found to increase the vigor of certain crop species, especially in relation to environmental stressors like drought [for example in Almeida et al (2014)], there is no evidence that it affects seedling survival.…”

Section: Direct Effects Of Water Fungicides and Insecticides On Seementioning

confidence: 99%

Effects of Forest Fragment Area on Interactions Between Plants and Their Natural Enemies: Consequences for Plant Diversity at Multiple Spatial Scales

Viswanathan

Ghazoul

Lewis

et al. 2020

Front. For. Glob. Change

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Density-dependent interactions between plants and their natural enemies, including fungal pathogens and insect herbivores, help maintain plant species coexistence and diversity at local scales (α-diversity). However, turnover in plant species composition across space also contributes to biodiversity at larger spatial scales (β-diversity). Despite mounting evidence that enemies can maintain α-diversity, we know little about their contributions to β-diversity. Additionally, in the light of widespread habitat fragmentation and potentially modified insect and pathogen communities in forest fragments, the effects of fragment area on their diversity-maintaining roles are largely unknown. We carried out a field experiment to investigate how natural enemies in impact tree α and β-diversity in a fragmented rainforest landscape in the Western Ghats, India. In 21 rainforest fragments, we suppressed insects and fungi/oomycetes with pesticides, and examined changes in the diversity of tree seedlings. We found that fungicide had no effect on α-diversity, but significantly decreased β-diversity (species turnover among plots). The facilitative effects of fungi and oomycetes on β-diversity, however, weakened as fragments decreased in area, indicating that certain specialized plant-pathogen interactions may be lost when fragments become smaller. Insecticide, in contrast, increased α-diversity but tended to decrease β-diversity between distant plots. In summary, we found that interactions between plants and their natural enemies help maintain β-diversity in large forest fragments but not in small fragments. Small fragments are often viewed as future reservoirs of biodiversity in human-dominated landscapes, but our findings suggest that modified interactions with natural enemies may result in the erosion of this diversity over time.

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“…Almeida et al (2014b), when treating seeds with thiamethoxam and lambdacyhalotrin, reported an increase in germination, especially when seeds were submitted to temperatures between 10 and 13 ºC. Thiamethoxan also optimized seed performance (Almeida et al, 2014a).…”

Section: IVmentioning

confidence: 99%

Performance of Rice Crop as Function of Seed Treatment and Irrigation Method

Concenço¹,

Andrés²,

Parfitt³

et al. 2019

IJAERS

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we aimed with this study to evaluate the performance of irrigated rice plants, as a function of seed treatment composition and crop irrigation management. Two factors were studied in the trial: (A) irrigation management (continuous or intermittent); and (B) seed treatment composition (complete, fungicide only, insecticide only, no treatment + clomazone, and no treatment without herbicide). Standak and Vitavax-Thiram were used as insecticide and fungicide standards, respectively. The Guri Inta CL rice variety, treated three days before planting, was adopted. Irrigation was established twenty days after emergence. In continuous irrigation, a 7 cm mean water layer was maintained during the experimental period; in intermittent irrigation, a 10 cm initial water layer was established and then water supply was interrupted until 10-15% of the plot was aerated, when the 10 cm layer was reestablished. Twelve days after sowing, rice emergence was evaluated. Twenty days after crop emergence, the rice plant height was evaluated. Thirty days after emergence, plant density was again measured. At the end of the crop cycle, grain yield was evaluated. Data were analyzed based on confidence intervals at 95% level. There is no evidence of interference from the differential seed treatment on the agronomic performance of rice, nor differences resulting from their interaction with the irrigation management.

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Treatment of rice seeds with thiamethoxam: reflections on physiological performance

Cited by 11 publications

References 6 publications

Comparative effect of different insecticides on the growth and yield of soybeans

Comparative effect of different insecticides on the growth and yield of soybeans

Effects of Forest Fragment Area on Interactions Between Plants and Their Natural Enemies: Consequences for Plant Diversity at Multiple Spatial Scales

Performance of Rice Crop as Function of Seed Treatment and Irrigation Method

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