Development ofTrichogramma australicum (Hym.: Trichogrammatidae) at low and high population density in artificial diet

Dahlan, AN; Gordh, Gordon

doi:10.1007/bf02769812

Cited by 8 publications

(2 citation statements)

References 11 publications

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“…This is caused by black deposits that forms a cocoonshaped cuticle around the body of the larva and inner surface of the chorion of the host egg (Saakian- Baranova, 1991). The black deposits are secreted through the labial glands by Trichogramma larvae when larvae have consumed all the ooplasm, thus hosteggshell blackening indicates the onset of prepupal stage (Dahlan & Gordh, 1997). Therefore, when determining parasitization capacity by counting the number of host eggs that turned black, the number of parasitized hosts with parasitoids that died before the onset of pupation is not known.…”

Section: Methodsmentioning

confidence: 99%

Is the parasitization capacity of Trichogramma cordubensis influenced by the age of the females?

Garcia¹,

Wajnberg

Oliveira³

et al. 2001

Entomologia Exp Applicata

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We investigated the parasitization capacity of Trichogramma cordubensis Vargas & Cabello (Hymenoptera: Trichogrammatidae) females aged 24 h, 48 h, 72 h, 96 h, 120 h, and 144 h, using Ephestia kuehniella Zeller (Lepidoptera: Pyralidae) eggs as hosts. Wasps were held without hosts during the period of ageing, therefore being increasingly time‐limited with respect to parasitization as they got older. The total number of parasitized hosts decreased as the age of the parasitoid increased. However, the proportion of lifetime parasitism carried out on the first day increased with wasp age, up to 120‐h old females. These results show that the parasitization capacity of ageing T. cordubensis females changes as they become time‐limited. The consequences of such changes for biological control programs are discussed.

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Section: Methodsmentioning

confidence: 99%

Is the parasitization capacity of Trichogramma cordubensis influenced by the age of the females?

Garcia¹,

Wajnberg

Oliveira³

et al. 2001

Entomologia Exp Applicata

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“…As a result, some Trichogramma females' ovipositors may not be able to penetrate eggshells. Even if they are successful in laying their offspring inside the eggs, the offspring may not be able to bite through the eggshells and emerge successfully [35,36]. In our study, we observed that the eggshell thickness of the ES eggs was approximately 15 µm thinner than that of the COS eggs.…”

Section: Discussionmentioning

confidence: 54%

Parasitism and Suitability of Trichogramma chilonis on Large Eggs of Two Factitious Hosts: Samia cynthia ricini and Antheraea pernyi

Zhang,

Xue,

Tariq

et al. 2023

Insects

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Trichogramma, an effective biological control agent, demonstrates promise in environmentally sustainable pest management through its parasitic action toward insect eggs. This study evaluates the parasitism fitness and ability of T. chilonis with regard to two factitious host eggs, aiming to develop a cost-effective biological control program. While T. chilonis demonstrated the ability to parasitize both host eggs, the results indicate a preference for ES eggs over COS eggs. The parasitism and emergence rates of T. chilonis regarding ES eggs (parasitism: 89.3%; emergence: 82.6%) surpassed those for COS eggs (parasitism: 74.7%; emergence: 68.8%), with a notable increase in the number of emergence holes observed in the ES eggs compared to the COS eggs. Moreover, the developmental time of T. chilonis for ES eggs (10.8 days) was shorter than that for COS eggs (12.5 days), resulting in a lower number of dead wasps produced. Notably, no significant difference was observed in the female ratios between the two species. A comprehensive analysis was conducted, comparing the size and shell thickness of the two factitious hosts. The ES eggs exhibited smaller dimensions (length: 1721.5 μm; width: 1178.9 μm) in comparison to the COS eggs (length: 2908.8 μm; width: 2574.4 μm), with the ES eggshells being thinner (33.8 μm) compared to the COS eggshells (47.3 μm). The different host species had an effect on the body length of the reared parasitoids, with T. chilonis reared on COS hosts exhibiting a larger body length (female: 626.9 µm; male: 556.7 µm) than those reared on ES hosts (female: 578.8 µm; male: 438.4 µm). Conclusively, the results indicate that ES eggs present a viable alternative to COS eggs for the mass production of Trichogramma species in biological control programs.

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Reproduction and Immature Development of Egg Parasitoids

Boivin

2009

Egg Parasitoids in Agroecosystems With Emphasis on Trichogramma

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Development ofTrichogramma australicum (Hym.: Trichogrammatidae) at low and high population density in artificial diet

Cited by 8 publications

References 11 publications

Is the parasitization capacity of Trichogramma cordubensis influenced by the age of the females?

Is the parasitization capacity of Trichogramma cordubensis influenced by the age of the females?

Parasitism and Suitability of Trichogramma chilonis on Large Eggs of Two Factitious Hosts: Samia cynthia ricini and Antheraea pernyi

Reproduction and Immature Development of Egg Parasitoids

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