Action Du Traitement au Froid Et Aux Ultraviolets De L'œuf D'Ephestia Kuehniella [Pyralidae] sur le taux de multiplication deTrichogramma evanescens etT. Brasiliensis [Hymenoptera: Trichogrammatidae]

Voegelé, Jean; Daumal, J.; Brun, P.; Onillon, J.

doi:10.1007/bf02371059

Cited by 27 publications

(13 citation statements)

References 6 publications

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“…(Hubner) were suitable for the development of Trichogramma minutum. Voegele et aL (1974) have shown that U. V. sterilized eggs ofEphestia kuehniella have no effect on fecundity of 2 species of Trichogramma. On peut 61ever Trichogramma brasiliensis darts les ceufs de 9 de la teigne de la pomme de terre, st6rilis6es par rayormement gamma.…”

Section: Resultsmentioning

confidence: 98%

Development ofTrichogramma brasiliensis [Hym: Trichogrammatidae] on eggs of radiation sterilized females of potato tuberworm,Phthorimaea operculella [Lep.: Gelechiidae]

1987

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Trichogramma brasiliensis (Ashrnead) could be successfully reared on the eggs laid by gamma-irradiated sterile 9 of the potato tuberworm, Phthorimaea operculella Zeller. Even after rearing l 0 generations of the parasitoid on such eggs there were no adverse effects on various developmental parameters. KEY-WORDS:Trichogramma brasiliensis development, sterile eggs, gamma radiation Phthorimaea operculella. Smith & DeBach (1953) suggested that artificial infestation of plants with insects to increase host density could be a way of synchronizing population build-up of host and its parasite. This strategy, however, might not work effectively in case of an egg parasite as the larvae emerging from unparasitized eggs could cause damage to the crop. Kaipling (1966) proposed that if biological agents and sterile insects are used together in an integrated programme, suppression of the pest population would be more efficient. Trichogramma brasiliensis (Ashmead) is an egg parasite of several lepidopterous insect pests including the potato tuber worm, Phthorimaea operculella in storage. Rananavare (1984) observed that release of sterile adults of both sexes together or sterile 9 alone was less effective than release of sterile d' alone. Any autocidal control would be economical if the surplus 9 are utilized fruithfully. Shipp & Osborn (1966) have argued that releasing of sterile insects into the environment would add to resources, thus helping to increase the number of parasites and predators. Present study was, therefore, undertaken as an initial step to evaluate suitability of eggs laid by radiation steriized potato tuber worm 9 for the development of Trichogramma brasiliensis. MATERIALS AND METHODSTrichogramma brasiliensis was multiplied in the laboratory using Phthorimaea operculella eggs killed by exposing them for 24 h to freezing temperature of -4~ To obtain sterile eggs, 0-16 h old 9 of Phthorimaea operculella, reared on potatoes, were irradiated with a gamma radiation sterilizing dose of 30 krad (Rananavare, 1984). They were then paired with unirradiated d and eggs laid were collected daily and used. Cold-killed eggs were used as controls.

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Section: Resultsmentioning

confidence: 98%

Development ofTrichogramma brasiliensis [Hym: Trichogrammatidae] on eggs of radiation sterilized females of potato tuberworm,Phthorimaea operculella [Lep.: Gelechiidae]

1987

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“…The parasitoids that emerged from these eggs were identified by means of molecular tools (Khoualdia et al 1995;Pizzol et al 2005) and used to establish a colony. The two strains studied were reared on UV irradiated eggs of a substitute host, the Mediterranean flour moth Ephestia kuehniella Zeller (Voegelé et al 1974;Daumal et al 1975;Ayvaz and Karabörklü 2008;Mansour 2010) (25 ± 1°C, 70 ± 5% R.H. and L16:D8). UV irradiated eggs could be stored for a long time though in our experiments they were not older than 5 days.…”

Section: Biological Materialsmentioning

confidence: 99%

Temperature-dependent differences in biological traits between two strains of Trichogramma cacoeciae (Hymenoptera: Trichogrammatidae)

Pizzol

Pintureau

Khoualdia³

et al. 2010

J Pest Sci

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“…The egg cards were prepared by spraying a fixed area (0.8 9 0.8 cm) of an index card with water solution of non-toxic glue (30% of ''Arabic glue''), and then spreading host eggs on this surface (400 ± 10 eggs) using a sieve. The host eggs were less than 24 h old and were previously irradiated with ultra-violet light for 20 min to prevent development (Voegelé et al 1974). Each egg card was exposed to 10 unmated T. cordubensis females (less than 24 h old), inside a glass tube (7 9 1 cm) with a drop of a 10% honey solution to provide a carbohydrate source.…”

Section: Induction Of Diapause and Cold Storagementioning

confidence: 99%

Side-effects of organic and synthetic pesticides on cold-stored diapausing prepupae of Trichogramma cordubensis

2008

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The side-effects of three insecticides (deltamethrin, lambda-cyhalothrin and Bacillus thuringiensis Berliner) and one fungicide (basic copper sulphate) were tested on cold-stored diapausing prepupae of Trichogramma cordubensis Vargas and Cabello (Hymenoptera: Trichogrammatidae). Pesticides were directly sprayed on parasitized host eggs (being the diapausing parasitoids in the prepupal stage) after cold storage (3°C) for three different periods (60, 120 and 180 days). Regardless of the period of cold storage, both pyrethroids reduced the emergence rates of T. cordubensis (both \25%) compared to the control (emergence varied from 83% to 89%). The most toxic pyrethroid was lambda-cyhalothrin; Trichogramma cordubensis adult emergence varied from 7% to 15%. Lambda-cyhalothrin also negatively affected the longevity and fecundity of parasitoids cold stored for 60 days. Bacillus thuringiensis Berliner subsp. kurstaki and basic copper sulphate had little or no adverse effect on emergence rates (generally [80%), longevity nor fecundity of T. cordubensis, indicating that these pesticides could be successfully integrated into pest management programs using wasps that were cold stored under diapause. Such integration would be valuable to pest management programs by reducing the costs of T. cordubensis mass rearing and by allowing producers to stockpile parasitoids for release in the growing season. However, since the emergence rate, longevity and fecundity of T. cordubensis generally decreased with increasing duration in cold storage, wasps to be used in integrated pest management programs should only be stored at 3°C for 60 days maximum.

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Action Du Traitement au Froid Et Aux Ultraviolets De L'œuf D'Ephestia Kuehniella [Pyralidae] sur le taux de multiplication deTrichogramma evanescens etT. Brasiliensis [Hymenoptera: Trichogrammatidae]

Cited by 27 publications

References 6 publications

Development ofTrichogramma brasiliensis [Hym: Trichogrammatidae] on eggs of radiation sterilized females of potato tuberworm,Phthorimaea operculella [Lep.: Gelechiidae]

Development ofTrichogramma brasiliensis [Hym: Trichogrammatidae] on eggs of radiation sterilized females of potato tuberworm,Phthorimaea operculella [Lep.: Gelechiidae]

Temperature-dependent differences in biological traits between two strains of Trichogramma cacoeciae (Hymenoptera: Trichogrammatidae)

Side-effects of organic and synthetic pesticides on cold-stored diapausing prepupae of Trichogramma cordubensis

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