Effects of 2 nematicides on biological activity in a Typic Haplaquoll at Castlepoint: 1. Site, soils, treatments, and environmental conditions

Yeates, G. W.; Leslie, David M.; Stannard, Ruth E.; McLaren, N. A.

doi:10.1080/00288233.1984.10418017

Cited by 13 publications

(2 citation statements)

References 20 publications

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“…Significant changes in the total numbers of nematodes occurred during 8 of the 10 sampling intervals, with summer (February-March) lows. The arithmetic mean for the period was 2579 000/m2 -greater than the annual mean for the typical sites reported in Yeates (1984) and less than that for 3 mature Waikato pastures sampled in 1982-83 which ranged between 3 124000 and 4 503 000/m 2 (Yeates unpublished data).…”

Section: Cultivar Effectsmentioning

confidence: 99%

“…Although ox amyl and its nematicidally active degradation compounds have relatively low persistence (about 70 days for a nematicidal application in Yeates et al 1984) significant control was maintained under Nui ryegrass in the winter period without oxamyl applications (23 March-6 September 1982). However, there was some 'loss of control' at the end of this period, the percentage reductions being 50,70,76, and 19 at the 4 samplings.…”

Section: Total Nematodesmentioning

confidence: 99%

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Influence of repeated oxamyl application on nematode populations beneath 4 ryegrass cultivars on a yellow-brown loam

Yeates¹,

Barker

1986

New Zealand Journal of Agricultural Research

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Plots in a grazed trial in which 4 ryegrass cultivars received regular insecticidal applications of oxamyl were sampled at about 2-month intervals from September 1981 to May 1983 and generic nematode populations assessed. Significant treatment, sampling time, block, and cultivar effects were found. Oxamyl reduced most nematode populations, including Heterodera, Meloidogyne, Helicotylenchus, Paratylenchus, and Pungentus, possibly contributing to increased herbage production and influencing sward composition. The greatest cultivar effect was depression of Paratylenchus beneath the low-yielding 'Grasslands Manawa'. There was no evidence of nematodes developing tolerance to oxamyl, and population reduction occurred to 90 cm depth.

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Section: Cultivar Effectsmentioning

confidence: 99%

Section: Total Nematodesmentioning

confidence: 99%

Influence of repeated oxamyl application on nematode populations beneath 4 ryegrass cultivars on a yellow-brown loam

Yeates¹,

Barker

1986

New Zealand Journal of Agricultural Research

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Field movement and persistence of fenamiphos in drip‐irrigated pineapple soils

Schneider¹,

Green²,

Apt³

et al. 1990

Pestic. Sci.

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The persistence and mobility of fenamiphos and its toxic oxidation products in soil with pineapple cropping were studied in three field experiments on the islands of Oahu and Lanai, and by sampling three commercial fields on Oahu. Fenamiphos was applied by drip irrigation after planting, following pre‐plant application of 1,3‐dichloropropene (1,3‐D) in most treatments. The Oahu experiments, conducted on highly weathered Oxisol and Ultisol soils, evaluated the impact of restricted irrigation to reduce leaching and also the effect of 1,3‐D on fenamiphos behavior. Total toxic residue (TTR) concentrations of 1000 ug kg−1 or greater were maintained in the root‐zone with fenamiphos applications of 3.4 kg ha−1 tri‐monthly on the Oxisol (Kunia site) and bi‐monthly on the Ultisol (Whitmore site). The relatively high applications, along with weekly irrigations and unseasonably high rainfall, resulted in leaching of fenamiphos TTR out of the root‐zone with concentrations between 10 and 100 ug kg−1 at 3 m depth. Reduced leaching with restricted irrigation was evident in the early months of both Oahu experiments. The potential to minimize leaching of fenamiphos by reduced application rates and limited irrigation during rainy periods was evident from nematicide concentration profiles measured on three commercial pineapple fields on Oahu; little fenamiphos TTR was detectable below 1 m.

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Effects of root-feeding nematodes on aboveground net primary production in a North American grassland

Ingham

Detling

1990

Plant Soil

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The impact of nematode consumption on aboveground net primary production (ANPP) was addressed by treating two areas of mixed-grass prairie with the nematicide carbofuran. Monthly assessments of shoot biomass and nematode populations were made from each treated and control site for two growing seasons. Seasonal mean density of root-feeding nematodes was reduced approximately 82% by carbofuran. ANPP was significantly greater in the treated plots for both seasons in Site 1 but only for the second year in Site 2. Increases in ANPP averaged 51% in Site 1 and 26% in Site 2. It was estimated that root-feeding nematodes reduced ANPP by 16 times more than they consumed.

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Effects of 2 nematicides on biological activity in a Typic Haplaquoll at Castlepoint: 1. Site, soils, treatments, and environmental conditions

Cited by 13 publications

References 20 publications

Influence of repeated oxamyl application on nematode populations beneath 4 ryegrass cultivars on a yellow-brown loam

Influence of repeated oxamyl application on nematode populations beneath 4 ryegrass cultivars on a yellow-brown loam

Field movement and persistence of fenamiphos in drip‐irrigated pineapple soils

Effects of root-feeding nematodes on aboveground net primary production in a North American grassland

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