A Method of Estimating the Density of Frit Fly Eggs in the Field

Webley, D.

doi:10.1111/j.1365-3059.1957.tb00772.x

Cited by 15 publications

(6 citation statements)

References 3 publications

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“…The problem of sampling O. frit eggs has been discussed by Webley (1957). In the present work, eggs of O. frit laid on or around oat shoots were sampled by cutting out lengths of row with a Cardiff sampler (Webley, 1957).…”

Section: Samplingmentioning

confidence: 99%

The phenology of Oscinella spp. (Diptera: Chloropidae)

Vickerman

1980

Bull. Entomol. Res.

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Counts were made of the numbers of Oscinella adults caught in water traps in plots of grass and oats and in a suction trap in north-eastern England in 1969 and 1970. The numbers of eggs laid by O. frit (L.), O. vastator (Curt.), O. nitidissima (Mg.), O. hortensis Collin and O. maura (Fall.) on their respective host-plants were also counted. In both years, there were two generations of O. nitidissima and O. nigerrima (Macq.) and one of O. maura. In 1969, there were two generations of O. frit and one of O. hortensis and O. vastator. In 1970, there were partial second generations of O. hortensis and O. vastator and a partial third generation of O. frit. O. nigerrima was the first species to appear in the spring, followed by O. frit and O. nitidissima. O. hortensis, O. vastator and O. maura emerged later, and these species dominated the trap catches in July. The proportions of O. frit and O. nitidissima increased in August, and by late September these species again dominated the catch. The proportions of O. vastator and O. hortensis in the suction-trap catches were much lower than in the water-trap catches. Adults of all species were always found in the grassland water traps before they were found in the suction trap. The migratory requirements of other species in the genus, in particular O. maura and O. vastator, may be less than those of O. frit. The oviposition period on particular grass species was relatively long, and thus control of Oscinella spp. on grassland would be difficult.

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Section: Samplingmentioning

confidence: 99%

The phenology of Oscinella spp. (Diptera: Chloropidae)

Vickerman

1980

Bull. Entomol. Res.

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“…Egg and plant counts were made on August 2 and 19, and on September 12 and 19, and details are shown below. The egg counts are the bulked results of ten samples, each of 9 square inches (five from each control plot), taken with the Cardiff sampler (Webley, 1957). The shoot counts are based on the plants from the same samples: From these figures it appears that the majority of the eggs were laid in the first two weeks when the young seedlings were appearing above ground level.…”

mentioning

confidence: 99%

Effect of Frit Fly on the Development of a Ley

Webley¹

1958

Plant Pathology

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“…(76x76 mm) and 1 in. (25 mm) deep were removed by a sampling tool for frit fly eggs (Webley, 1957) and washed in a Fenwick can in the laboratory to collect carrot fly eggs. Samples were taken from headlands of carrot fields and, at peak oviposition, up to 30 unhatched eggs Were ofteh recovered from each sample.…”

Section: Methodsmentioning

confidence: 99%