Residual phytotoxic activity of pethoxamid in soil and its concentration in soil water under different soil moisture conditions

Dhareesank, Arm; Kobayashi, Katsuichiro; Usui, Kenji

doi:10.1111/j.1445-6664.2006.00195.x

Cited by 11 publications

(11 citation statements)

References 13 publications

(23 reference statements)

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“…The highest total differences in pethoxamid amount (P = 0.0007) were recorded between irrigated and non-irrigated treatments. These results are in contrast to the results of Dhareesank et al (2006). They found a similar pethoxamid concentration decrease in both the liquid and solid soil phases under different soil moisture conditions.…”

Section: Resultscontrasting

confidence: 99%

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Effect of precipitation on the dissipation, efficacy and selectivity of three chloroacetamide herbicides in sunflower

Jursík¹,

Kočárek²,

Hamouzová³

et al. 2013

PLANT SOIL ENVIRON

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The aim was to compare the efficacy, selectivity to sunflower and dissipation of three chloracetamide herbicides (acetochlor, metolachlor and pethoxamid) in dependence on precipitation after application. A small plot field trial was carried out with sunflower in Central Bohemia in 2010 and 2011. The remaining concentration of active ingredient in the soil of all studied herbicides was lower in the year with a higher temperature and a low level of total natural precipitation at the beginning of the growing season. Higher leaching of metolachlor and pethoxamid was recorded in irrigated plots. No leaching was found in the case of acetochlor. The highest leaching was found for metolachlor (9.2-25.5% in soil layer 5-10 cm). The highest phytotoxicity was found for acetochlor (9.8%) > pethoxamid (4.6%) > metolachlor (1.8%). The mean phytotoxicity in the irrigated plots was 6.9%, compared with 3.9% in the non-irrigated plots. The efficacy of the tested herbicide was affected by wet conditions. The highest efficacy on Chenopodium album, Amaranthus retroflexus, Echinochloa crus-galli and Solanum physalifolium was recorded after application of acetochlor and irrigation.

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Section: Resultscontrasting

confidence: 99%

“…The activity of pethoxamid in the soil depends on the decrease of its concentration in soil water with time, except under conditions of low soil moisture insufficient for seedling growth (Dhareesank et al 2006).…”

mentioning

confidence: 99%

Effect of precipitation on the dissipation, efficacy and selectivity of three chloroacetamide herbicides in sunflower

Jursík¹,

Kočárek²,

Hamouzová³

et al. 2013

PLANT SOIL ENVIRON

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“…High weed densities led to yield losses of sunflower, especially on non-irrigated plots. According to Dhareesank et al (2006), the activity of pethoxamid depends on changes in its concentration in soil over time, except when low soil moisture does not allow weed emergence.…”

Section: Discussionmentioning

confidence: 99%

Efficacy and selectivity of pre-emergent sunflower herbicides under different soil moisture conditions

Jursík¹,

Soukup²,

Holec³

et al. 2015

Plant Prot. Sci.

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Jursík M., Soukup J., Holec J., Andr J., Hamouzová K. (2015): Efficacy and selectivity of pre-emergent sunflower herbicides under different soil moisture conditions. Plant Protect. Sci., 51: 214-222.We ranked the most frequently used pre-emergent herbicides in sunflower (Helianthus annuus) according to their efficacy and selectivity under different soil moisture conditions within 2008-2011. The efficacy of oxyfluorfen, aclonifen, acetochlor, dimethenamid, and propisochlor on the majority of weeds (Chenopodium album, Echinochloa crus-galli, Amaranthus retroflexus, Mercurialis annua, and Solanum physalifolium) was only slightly affected by the soil moisture and these herbicides can be used in arid and semiarid regions. The efficacy of linuron, prosulfocarb, and pethoxamid was strongly affected by soil moisture and was insufficient under dry conditions. The majority of herbicides showed good selectivity for sunflower. Crop injury rate of 5-15% was recorded after application of flurochloridone and acetochlor. For flurochloridone, the phytotoxicity increased due to irrigation after herbicide application. The highest sunflower injury rate (27-35%) was recorded after application of oxyfluorfen.

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“…It has been well known that herbicide activity is affected by soil conditions, including soil property and water conditions. Recently, it was reported that the residual phytotoxic activity of pethoxamid (2‐chloro‐ N‐ [2‐ethoxyethyl]‐ N‐ [2‐methyl‐1‐phenyl‐1‐propenyl] acetamide) in upland soil depended on its decreasing concentration in the soil water with time (Dhareesank et al . 2006).…”

Section: Introductionmentioning

confidence: 99%

Residual activity of clomeprop and its downward movement under laboratory conditions

Murano

Kobayashi

Fujihara

2007

Weed Biology and Management

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The relationship between the behavior of clomeprop ([RS]-2-[2,4-dichloro-mtolyloxy]propionanilide) and its residual phytotoxic activity in the soil was investigated in the laboratory with special emphasis on the concentration in the soil water.The phytotoxic activity of clomeprop on radish seedlings (Raphanus sativus L. var. radicula cv. Akamaruhatsukadaikon), as the test plant, became greater with time after application but the inhibition was different between the two soils, which had different properties. The amount of 2-(2,4-dichloro-3-methylphenoxy)propionic acid (DMPA), a hydrolyzed and active metabolite of clomeprop, in the soil water and total soil increased with time, corresponding to the decrease in the amount of clomeprop under non-water leakage conditions. The residual phytotoxic activity of clomeprop in the soil was more highly correlated with the concentration of DMPA in the soil water than with the amount of DMPA in the total soil. In addition, a leaching column test was conducted with clomeprop and DMPA.The DMPA easily moved downward and the concentration in the soil water in the upper layer decreased with time after application. It is supposed that the downward movement of DMPA was one of the factors influencing the lasting effect of clomeprop in the field.

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Residual phytotoxic activity of pethoxamid in soil and its concentration in soil water under different soil moisture conditions

Cited by 11 publications

References 13 publications

Effect of precipitation on the dissipation, efficacy and selectivity of three chloroacetamide herbicides in sunflower

Effect of precipitation on the dissipation, efficacy and selectivity of three chloroacetamide herbicides in sunflower

Efficacy and selectivity of pre-emergent sunflower herbicides under different soil moisture conditions

Residual activity of clomeprop and its downward movement under laboratory conditions

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