Studies on the population control of Pieris brassicae L. by Apanteles glomeratus L.

Karnavar, G. K.

doi:10.1017/s1742758400002460

Cited by 3 publications

(3 citation statements)

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“…Shapiro (1976) observed that the effect of dietary regime of the host on the growth of speci c parasites, nding that C. glomerata parasitized 80-90% of the larvae. Karnavar (1983) reported parasitism of 92.68-93.43% in P. brassicae larvae by C. glomerata. There were 5766 late instar larvae alive at the end.…”

Section: Resultsmentioning

confidence: 99%

Field life tables and key mortality factors of Pieris brassicae (Linnaeus) infesting cauliflower (Brassica oleracea var. botrytis)

SHIKHA,

CHANDI,

KATARIA

et al. 2023

Preprint

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To investigate the key mortality factors of Pieris brassicae (Linnaeus) on cauliflower (Brassica oleracea var. botrytis), a field study was conducted on the field life table during 2021-22 at the research farm of the Punjab Agricultural University, Ludhiana, Punjab, India. Among biotic factors, Cotesia glomerata, Beauveria bassiana (Bals.), NPV, Bacillus thuringiensis (Berliner) were the main causes of mortality. Other unknown factors (temperature, rainfall, relative humidity, etc.) also contrived slight decline to all the immature stages of P. brassicae. Results revealed that the egg stage was affected due to unknown factors, whereas early larval instar stage (I-III) was the most sensitive followed by the late larval instar stage and pupal stage. The trend index was positive during both seasons 16.91 (main season), and 19.17 (late season), indicating that population of P. brassicae increases in the following season. Similar trend was observed in generation survival i.e., 0.39 (main season) and 0.32 (late season). In this study, a range of biotic factors was identified which could help to manage the pest at its early stages and the potential to be used as an integral component of integrated pest management of P. brassicae in cauliflower.

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Section: Resultsmentioning

confidence: 99%

Field life tables and key mortality factors of Pieris brassicae (Linnaeus) infesting cauliflower (Brassica oleracea var. botrytis)

SHIKHA,

CHANDI,

KATARIA

et al. 2023

Preprint

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“…This has also been observed in other species of gregarious parasitoid (Bakker et al, 1985;Waage, 1986) and Waage (1986) suggested that this behaviour represents an adaptive decision by the wasp to increase the size of its own clutches laid in previously-parasitised hosts. Large brood sizes indicative of superparasitism have also been recorded from field-collected P. brassicae (Richards, 1940;Karnavar, 1983;le Masurier, 1987). Under the conditions of the experiment described in this paper, however, the wasp's first reaction to a previously-parasitised host was always to reject it.…”

Section: Clutch Sizesmentioning

confidence: 89%

Host discrimination by Cotesia (=Apanteles) glomerata parasitising Pieris brassicae

Masurier

1990

Entomologia Exp Applicata

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The extent to which the parasitoid Cotesia glomerata (L.) (Hymenoptera: Braconidae) discriminates between parasitised and unparasitised host larvae was tested by comparing the mean clutch sizes laid in thirty unparasitised and thirty parasitised two day‐old Pieris brassicae (L.) (Lepidoptera: Pieridae) larvae. No eggs were laid in any of the previously‐parasitised hosts. In contrast, eggs were laid in all but two of the unparasitised hosts. Most host‐rejections involved only a brief insertion of the ovipositor, lasting two seconds or less. However, nearly a third occurred after a more prolonged insertion of the ovipositor, with a mean duration of twenty seconds: not significantly different from that of a normal oviposition. Résumé Discrimination des hôtes par les Cotesia (= Apanteles) glomeratus parasitisant Pieris brassicac Cotesia glomerata (L.) (Hymenopteres: Braconidae) montre deux types de comportement associés à l'oviposition et à l'insertion dans des larves (Pieris brassicae (L.), Lepidoptères: Pieridae) hôtes. Dans le premier cas, il s'agit d'une longue insertion de l'ovipositeur d'une duree de cinq a vingt secondes d'habitude. Dans le second cas, on voit le comportement après une insertion de l'ovipositeur durant deux secondes ou moins. Chez les C. glomerata et chez les autres espèces parasitoides, la première catégorie de comportement a été interprétée comme pondaison (comportement ovipositif) quand à la seconde, elle a été définie comme rejet des hôtes préparasitisés (ou comportement exploratoire). Dans cette étude‐ci, on a enregistré la réaction (ovipositive exploratoire) de six guêpes chacuner exposées alternativement à cinq larves parasitisées et à cinq larves non parasitisées âgées de deux jours, le nombre d'œufs pondus dans chacune etant déterminé par dissection. Les œufs pondus par les premières et deuxièmes femelles pouvaient être distinguées par leur grandeux et par leur apparence. Parmi les trente hôtes non‐parasitisés initialement, vingt‐huit furent parasitisés durant leur comportement ovipositif. On a exploré l'un trouvant qu'aucun œuf n'avait été pondu. La guêpe avait montré un comportement ovipositif envers un autre hôte sans pondre d'œuf. Aucun des trente hôtes parasitisés auparavant et qui furent réexposés n'avait été super parasitisé. On avait testé vingt et une hôte et la guêpe avait réagi ovipositivement à neuf d'entre eux sans pour autant pondre d'œuf. Il n'y avait pas eu de différence marquante entre la durée moyenne d'un comportement ovipositif des guêpes s'attaquant à des hôtes non‐parasitisés (lorsque des œufs avaient été pondus dans tous les cas sauf un) et par celles qui s'étaient attaquées à des hôtes parasitisés (alors qu'aucun œuf n'avait été pondu).

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“…This butterfly, indigenous to the Palaearctic region in the northern hemisphere, is an invasive species in other areas of the southern hemisphere besides South Africa: Chile where it has been established for over 36 years (Benyamini 1996;Gardiner 1974;Neira et al 1989), and New Zealand where it has purportedly subsequently been eradicated (Brown et al 2019). In Europe and Chile (and formerly in New Zealand), P. brassicae larvae are commonly parasitized by the microgastrine Cotesia glomerata (Linnaeus, 1758) (Braconidae), and pupae by Pteromalus puparum (Linnaeus, 1758) (Pteromalidae) (Karnavar 1983;Peters 1991;Shaw and Fitton 1989;Shaw and Huddleston 1991;Askew and Shaw 1997;Shaw et al 2009). Together these are the most effective parasitoids of Pieris brassicae and parasitism levels may exceptionally be as high as 100% (Peters 1991), but are usually much lower than this (Shaw et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Identity of wasp parasitoids (Hymenoptera) attacking Pieris brassicae (Linnaeus, 1758) (Lepidoptera: Pieridae) in South Africa

et al. 2022

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The alien invasive large cabbage white, Pieris brassicae (Linnaeus, 1758) (Pieridae), although introduced into South Africa more than 27 years ago, has not dramatically expanded its distribution, possibly because it is effectively attacked by two parasitoid wasp species. Even though there is a cohort of parasitoid species associated with P. brassicae in the Northern Hemisphere, these are the only two recorded parasitoids in South Africa. We determine these parasitoid wasps as Cotesia glomerata (Linnaeus, 1758) (Braconidae: Microgastrinae) and Pteromalus puparum (Linnaeus, 1758) (Pteromalidae), and provide high resolution images and DNA barcodes to facilitate their recognition. This is the first record of C. glomerata from the Afrotropical region.

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Studies on the population control of Pieris brassicae L. by Apanteles glomeratus L.

Cited by 3 publications

References 5 publications

Field life tables and key mortality factors of Pieris brassicae (Linnaeus) infesting cauliflower (Brassica oleracea var. botrytis)

Field life tables and key mortality factors of Pieris brassicae (Linnaeus) infesting cauliflower (Brassica oleracea var. botrytis)

Host discrimination by Cotesia (=Apanteles) glomerata parasitising Pieris brassicae

Identity of wasp parasitoids (Hymenoptera) attacking Pieris brassicae (Linnaeus, 1758) (Lepidoptera: Pieridae) in South Africa

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