Field evaluation of the egg parasitoid, Trichogramma evanescens West. against the olive moth Prays oleae (Bern.) in Egypt

Agamy, E. A.

doi:10.1007/s10340-009-0273-x

Cited by 19 publications

(11 citation statements)

References 21 publications

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“…Selection of the Trichogramma species showing highest affinity for the target pest and agroecosystem characteristics is crucial for ensuring the success of biological control programs (Smith 1996;Agamy 2010). Indeed, parasitoid effectiveness varies largely according to species (and even strains of one species) (Klug and Meyhöfer 2009;Tabone et al 2010) or climatic conditions (Smith 1996).…”

Section: Introductionmentioning

confidence: 99%

Performance of four Trichogramma species (Hymenoptera: Trichogrammatidae) as biocontrol agents of Heliothis virescens (Lepidoptera: Noctuidae) under various temperature regimes

et al. 2011

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Trichogramma spp. are major parasitoids of lepidopteran pest eggs, but there is large variation in efficacy toward a given pest among the numerous described Trichogramma species. It is important to select the Trichogramma species that most effectively parasitize and develop in target pest eggs for biological control. In this context, Trichogramma pretiosum, T. exiguum, T. atopovirilia and T. acacioi were studied in Heliothis virescens eggs under different thermal conditions. The parasitoids were reared at constant temperatures of 20, 25 and 30°C and tested at these respective temperatures, while parasitoids reared at 25°C were also tested at 20 and 30°C, for a total of 20 species-temperature combinations. About 30 H. virescens eggs were offered to the parasitoids for 24 h. Among the four species, parasitism rate by T. atopovirilia was highest at all temperature conditions, whereas T. acacioi had the lowest rates of parasitism at 25°C and 25/30°C. Parasitism ranged from 13.8 to 43.8% among all species-temperature combinations. Viability (emerged parasitoids) ranged from 80.8 to 98.4%, and was deemed satisfactory. The emergence rates of T. exiguum and T. acacioi were affected by temperature. Temperature also affected the sex ratio of T. exiguum at 25/30°C, whereas T. pretiosum and T. acacioi produced females predominantly independent of temperature. Overall, the parasitoid T. atopovirilia was the most efficient in parasitizing H. virescens eggs, though the levels of parasitism obtained might not ensure its successful use in biological control programs. The temperature-related differences in biological traits observed in the four Trichogramma species tested hint at the importance of making careful choices regarding climatic conditions where the parasitoid is going to be used when selecting a species for biological control programs.

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Section: Introductionmentioning

confidence: 99%

Performance of four Trichogramma species (Hymenoptera: Trichogrammatidae) as biocontrol agents of Heliothis virescens (Lepidoptera: Noctuidae) under various temperature regimes

et al. 2011

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“…Notably, these tiny insects (length 1 mm) parasitize the eggs of many types of agricultural pest insects (Mills and Carl 1991;Smith 1996;Vinson 1998;Hazarika et al 2009;Agamy 2010;Suckling and Brockerhoff 2010), and they are easy to rear (Ayvaz and Karabörklü 2008;Pizzol and Pintureau 2008) and release in fields suffering from pest outbreaks. In order to develop biological control against P. xylostella in cabbage crops in France, the efficiency of 30 Trichogramma species, strains and Trichogrammatoidea sp.…”

Section: Introductionmentioning

confidence: 99%

Parasitism of different Trichogramma species and strains on Plutella xylostella L. on greenhouse cauliflower

et al. 2010

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The diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), is the most important pest of cultivated Brassica worldwide, including those grown in greenhouses like cauliflower. In this article, we evaluate the potential of various species (and various strains of some species) of Trichogrammatidae (Hymenoptera: Chalcidoidea) to control this pest on cauliflower in greenhouse in France. We assessed the parasitism levels on P. xylostella of 17 Trichogrammatidae strains, belonging to 12 different species (2 indigenous strains from France), under greenhouse conditions. Parasitism levels for each of the Trichogrammatidae species and strains were determined on cauliflower leaves (Brassica oleracea botrytis L., Brassicaceae) infested with P. xylostella eggs. Nine strains parasitized 60% (or more) of the P. xylostella eggs. Compared to previous results in laboratory conditions, climatic conditions of the greenhouse did not influence parasitism levels. The presence of the cauliflower plants may have a positive effect on eight strains, a negative effect on four strains and no effect on five strains. Our study points out the importance of including the host plant of P. xylostella when conducting studies aiming to select the most efficient parasitoid against this pest.

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“…the lesser sugarcane borer, Chilo agamemnon Bles. in sugarcane fields (El-Heneidy et al 1989), the corn borers (El-Wakeil 1997), the Berry moth, Lobesia botrana in grape farms (El-Wakeil et al 2009), and to control the Olive moth (Prays oleae) in olive groves (Agamy 2010).…”

Section: Introductionmentioning

confidence: 99%

Effect of honeybee products, as food supplements, on the biological activities of three Trichogramma species (Hymenoptera: Trichogrammatidae)

Mashal

Agamy

Abou-Bakr

et al. 2019

Egypt J Biol Pest Control

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Egg parasitoids play a significant role in biological control for lepidopteran insects, where they kill the eggs (the first stage of the developmental cycle). Trichogramma species are the very important ones of these egg parasitoids. Under natural conditions, adult Trichogramma species are known to feed upon nectar, pollen, and honeydew. Here, the effects of four honey bee products; honey, pollen grains, royal jelly, propolis, their mixtures, and sugar solution, as food supplements, on longevity, fecundity, emergence rate, and sex ratio on different Trichogramma species were evaluated. Three species, Trichogramma evanescens, T. bourarachae, and T. cacoeciae, differed in their responses to the tested diets. In general, all diets containing honey improved longevity and fecundity. Honey + royal jelly and honey + propolis were the most diets improved the longevity of T. evanescens. Honey + royal jelly + propolis and honey alone resulted in the longest lifetime for T. bourarachae. While the best diets that prolonged the longevity of T. cacoeciae were honey + royal jelly and honey alone. The highest fecundity was obtained by honey + royal jelly + propolis, honey + royal jelly, honey alone and honey + pollen grains + royal jelly for T. evanescens, honey + royal jelly + propolis, honey + pollen grains + propolis, and honey + pollen grains + royal jelly + propolis for T. bourarachae, and by honey + royal jelly, and honey alone in case of T. cacoeciae. The emergence rate had not affected by most of the treatments for three Trichogramma species. Food supplements caused an indirect effect on sex ratio of T. evanescens and T. bourarachae, whereas long-lived females were male-biased progeny. Except when T. evanescens females were fed on honey + royal jelly and T. bourarachae on honey + royal jelly, and honey + pollen grains + royal jelly, they lived for a long time but that did not decrease the female progeny percentage. Thus, providing a suitable diet may help to enhance the biological activities for the rearing parasitoids.

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Field evaluation of the egg parasitoid, Trichogramma evanescens West. against the olive moth Prays oleae (Bern.) in Egypt

Cited by 19 publications

References 21 publications

Performance of four Trichogramma species (Hymenoptera: Trichogrammatidae) as biocontrol agents of Heliothis virescens (Lepidoptera: Noctuidae) under various temperature regimes

Performance of four Trichogramma species (Hymenoptera: Trichogrammatidae) as biocontrol agents of Heliothis virescens (Lepidoptera: Noctuidae) under various temperature regimes

Parasitism of different Trichogramma species and strains on Plutella xylostella L. on greenhouse cauliflower

Effect of honeybee products, as food supplements, on the biological activities of three Trichogramma species (Hymenoptera: Trichogrammatidae)

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