Effect of photoperiod on parasitization by Trichogramma principium (Hymenoptera: Trichogrammatidae)

Reznik, S. Ya.; Vaghina, N. P.

doi:10.14411/eje.2007.089

Cited by 16 publications

(23 citation statements)

References 60 publications

(56 reference statements)

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“…It is well known that in synovigenic insects temperature may affect the duration of the pre-reproductive period by influencing the rate of oogenesis (Ratte, 1985;Brière et al, 1999). Maximal lifetime fecundity of Trichogramma females ranges up to 100 eggs, while emerging females have 20-25 eggs (Pak & Oatman, 1982;Pavlik, 1992;Pratissoli & Parra, 2000;Reznik et al, 2001Reznik et al, , 2003; see also the results of the present study). Thus, its ovigeny index is ca 0.25.…”

Section: Introductionsupporting

confidence: 60%

“…This study was done on an egg parasitoid Trichogramma buesi Voegele (= T. brassicae Voegele) (Hymenoptera: Trichogrammatidae), which is not only widely used for the biological control of lepidopteran pests (Mertz et al, 1995;Smith, 1996) but also a convenient model for various biological studies. In particular females of T. buesi, like those of many other Trichogramma species, refuse to parasitize eggs of laboratory hosts or delay parasitization for a period of up to 10-12 days (Pak & van Heiningen, 1985;Pavlik, 1993;Hoffmann et al, 2001;Bennett et al, 2002;Hansen & Jensen, 2002: Reznik & Vaghina, 2007asee Reznik et al, 2001see Reznik et al, , 2003 for more references). The results of an earlier study on Trichogramma principium Sug.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, its ovigeny index is ca 0.25. Dissections show that the Trichogramma females that delay parasitization have a lot of mature eggs in their ovaries, but their behaviour is blocked at the stage of arrestment and host recognition (Pak & van Heiningen, 1985;Pavlik, 1993;Schmidt, 1994;Reznik et al, 2001Reznik et al, , 2003Reznik & Vaghina, 2007b). Hence, temperature influences the duration of the pre-parasitization period by accelerating ethogenesis (age-related changes in behaviour, most probably, increase the motivation to parasitize or broaden host range), rather than by accelerating oogenesis.…”

Section: Introductionmentioning

confidence: 99%

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Effect of temperature on the reproduction and development of Trichogramma buesi (Hymenoptera: Trichogrammatidae)

Reznik¹,

Войнович²,

Vaghina³

2009

Eur. J. Entomol.

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Abstract. At emergence females of Trichogramma had a lot of mature eggs in their ovaries, but some delayed parasitization or refused to parasitize a laboratory host. The effect of constant and alternating temperatures on the percentage of Trichogramma buesi females parasitizing Sitotroga cerealella eggs and the duration of the pre-parasitization period were investigated. The temperature dependencies of the rate of preimaginal development, pre-emergence survival, number of eggs laid daily, and total lifetime fecundity were also determined. As the temperature was increased from 12 to 35°C, the median pre-oviposition period decreased from 5 days to 3 h, with maximum values of 24 and 1.5 days, respectively. The rate of induction of parasitization (reciprocal of duration of the pre-parasitization period of the females that parasitized) increased with temperature like the rate of preimaginal development and average number of eggs laid daily by a parasitizing female. Total cumulative percentage of parasitizing females reached a maximum (ca 60%) at temperatures of 25-30°C, while at 12 and 35°C, respectively, 25 and 50% of females parasitized the S. cerealella eggs. Average lifetime fecundity and pre-emergence survival showed a similar dependence on temperature. The influence of the thermorhythm (25°C for 4 h and 15°C for 20 h) was strongly dependent on its position within the photoperiod. When thermophase coincided with photophase, the percentage of females that parasitized was close to that recorded at a constant temperature of 25°C. But when the high temperature pulse coincided with the dark period, the percentage of parasitizing females was the same as at 15°C. Thus, the temperature dependence of ethogenesis (supposedly, an increase in motivation to parasitize or search for a host) in Trichogramma females was similar to that of morphogenesis, although the reaction to alternating temperatures may have been complicated by interaction with the light : dark regime.

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Section: Introductionsupporting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of temperature on the reproduction and development of Trichogramma buesi (Hymenoptera: Trichogrammatidae)

Reznik¹,

Войнович²,

Vaghina³

2009

Eur. J. Entomol.

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“…Having the majority of parasitism concentrated on the first day is a positive feature for mass releases in the field as this might guarantee quick pest control and allow growers to apply herbicides or fungicides shortly after the parasitoid release if necessary. Therefore, when choosing a release strategy it is important to consider whether parasitism is concentrated in the first days of life or evenly distributed throughout adulthood and to consider that this might vary due to differences in temperature (REZNIK; VAGHINA, 2006), hosts (REZNIK et al, 2001), or parasitoid species/strain (PIZZOL et al, 2010). These factors can influence the success of biological control programs using egg parasitoids of the genus Trichogramma (SMITH, 1996).…”

Section: Resultsmentioning

confidence: 99%

Parasitism capacity of Trichogramma pretiosum on eggs of Trichoplusia ni at different temperatures

et al. 2014

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ABSTRACT. Trichogramma spp. are egg parasitoids of various pest species of Lepidoptera including Trichoplusia ni, an important pest of plants in the genus Brassica. Of the climatic conditions that can impair Trichogramma spp. parasitism capacity, the temperature is critical. Thus, the objective of this research was to evaluate the parasitism capacity of Trichogramma pretiosum on eggs of T. ni at 18, 21, 24, 27, 30, and 33ºC; 70±10% RH; and 12/12 hours photophase (L/D). Fresh eggs of the host moth were offered to T. pretiosum daily. The parasitism rate varied between 8 and 11.4 eggs/female at the temperatures evaluated for the first 24 hours. The highest number of parasitized eggs per female occurred at 24ºC (53.0 parasitized eggs/female). The period of parasitism and the mean longevity of females were inversely related to the temperature. Temperature heavily influences the parasitism rate of T. pretiosum on eggs of T. ni, and the best overall performance of the parasitoid occurs from 24 to 27ºC.

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“…remus parasitism period (which is the time for how long T. remus females are active) might differ from female longevity. Parasitism period varies due to differences in temperature (Reznik and Vaghina, 2006), hosts (Reznik et al, 2001), or parasitoid species/strain (Pratissoli and Parra, 2000;Pizzol et al, 2010) and can influence the success of biological control programs using egg parasitoids (Smith 1996). Also, whether parasitism is more active in the first days of life or evenly distributed throughout adulthood is an important characteristic to be considered in choosing the best parasitoid release strategy (Bueno et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Biological parameters and parasitism capacity of Telenomus remus Nixon (Hymenoptera: Platygastridae) reared on natural and factitious hosts for successive generations

Pomari-Fernandes¹,

Bueno²,

Queiroz³

et al. 2015

Afr. J. Agric. Res.

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Factitious hosts are largely used in parasitoid production. However, changes in parasitism capacity may happen when hosts are switched. Therefore, the ability of a parasitoid species to be reared on factitious host and still keep high level of parasitism on the natural target pest after successive rearing can determine parasitoid quality and must be investigated. Thus, we evaluated Telenomus remus parasitism on Corcyra cephalonica eggs compared with its natural host, Spodoptera frugiperda eggs, for different generations. After being reared on C. cephalonica, T. remus parasitism on S. frugiperda was evaluated to measure different T. remus biological parameters and parasitism capacity (parasitoid quality). Gradual increase in C. cephalonica eggs parasitized was observed over the generations, stabilizing on generation F 7 . The number of parasitized C. cephalonica eggs was similar among generations (from generation F 7 to F 19 ). Taking the lifetime parasitism into consideration, parasitism capacity is similar from T. remus reared on S. frugiperda eggs from those reared on C. cephalonica eggs (generation F 19 ). When laboratory-produced T. remus on C. cephalonica eggs was exposed to the natural host, parasitism was higher on F 5 generation and stable from generations F 5 to F 19. Therefore, parasitoids did not lose their ability to parasitize eggs of natural host assuring good quality of the laboratory-produced parasitoid using C. cephalonica eggs as factitious host.

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Effect of photoperiod on parasitization by Trichogramma principium (Hymenoptera: Trichogrammatidae)

Cited by 16 publications

References 60 publications

Effect of temperature on the reproduction and development of Trichogramma buesi (Hymenoptera: Trichogrammatidae)

Effect of temperature on the reproduction and development of Trichogramma buesi (Hymenoptera: Trichogrammatidae)

<b>Parasitism capacity of <i>Trichogramma pretiosum</i> on eggs of <i>Trichoplusia ni</i> at different temperatures

Biological parameters and parasitism capacity of Telenomus remus Nixon (Hymenoptera: Platygastridae) reared on natural and factitious hosts for successive generations

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