scholarly journals EFFECT OF TEMPERATURE, PHOTOPERIOD, BIOLOGICAL AND CHEMICAL FACTORS OF THREE HOST SPECIES ON THE PERFORMANCE OF THE EGG PARASITOID Trichogramma evanescens WEST.

2013 ◽  
Vol 4 (9) ◽  
pp. 781-793
Author(s):  
M. Metwally ◽  
M. El-Kordy ◽  
H. Mohamed ◽  
A. El-Sebai ◽  
A. Atta
Keyword(s):  
Host Species ◽  
Egg Parasitoid ◽  
Effect Of Temperature ◽  
Trichogramma Evanescens ◽  
Chemical Factors

scholarly journals Cold storage and gamma irradiation of Sitotroga cerealella Olivier eggs (Lepidoptera: Gelechiidae) in relation to the success of parasitism by Trichogramma evanescens Westwood (Hymenoptera: Trichogrammatidae)

2019 ◽  
Vol 29 (1) ◽  
Author(s):  
Naglaa F. Abdel-Hameid ◽  
I. R. M. Elzoghby ◽  
A. L. Mehany ◽  
W. A. A. Sayed
Keyword(s):  
Gamma Irradiation ◽  
Cold Storage ◽  
Mass Rearing ◽  
Egg Parasitoid ◽  
Sitotroga Cerealella ◽  
Trichogramma Evanescens ◽  
Control Programs ◽  
Angoumois Grain Moth ◽  
Rearing Techniques ◽  
The Times

AbstractThe performance of parasitism by the egg parasitoid, Trichogramma evanescens Westwood (Hymenoptera: Trichogrammatidae) on eggs of Angoumois grain moth, Sitotroga cerealella Olivier (Lepidoptera: Gelechiidae) was investigated under cold storage and gamma irradiation treatments of the host eggs. Cold storage treatment could improve the parasitoid mass rearing techniques and reduced the costs of biological control programs, while gamma irradiation might be used as a supplementary support at the times of high demand. The suitability of the S. cerealella eggs, stored at – 20 °C for 0.5, 1, or 2 h. as a host for T. evanescens was evaluated. The sensitivity of S. cerealella eggs to gamma irradiation treatments and the acceptability of irradiated eggs for parasitism by T. evanescens females for the parental P and F1 generations were examined. The results revealed that parasitism was drastically reduced more than adult’s emergence and sex-ratio (% of females) after cold storage periods of S. cerealella eggs. Moreover, the parasitism percentages were relatively reduced to (97.1, 96.1, 93.03, and 92.7 %) after irradiating the S. cerealella eggs at 40, 60, 80, and 100 Gy, respectively than the control (97.3% emergence). The percentages of emergence and females’ percent were slightly decreased by gamma irradiation doses, while, equal preferred by the F1 generation of parasitoid that produced from irradiated S. cerealella eggs.

scholarly journals Parental host species affects behavior and parasitism by the pentatomid egg parasitoid, Trissolcus japonicus (Hymenoptera: Scelionidae)

2020 ◽  
Vol 149 ◽  
pp. 104324 ◽  
Author(s):  
Sean M. Boyle ◽  
Donald C. Weber ◽  
Judith Hough-Goldstein ◽  
Kim A. Hoelmer
Keyword(s):  
Host Species ◽  
Egg Parasitoid ◽  
Trissolcus Japonicus

Effectiveness of the egg parasitoid Trichogramma evanescens preventing rice moth from infesting stored bagged commodities

2015 ◽  
Vol 61 ◽  
pp. 102-107 ◽  
Author(s):  
Charles Adarkwah ◽  
George Nyarko ◽  
Nelson Opoku ◽  
Benjamin K. Badii ◽  
Isaac K. Addai ◽  
...  
Keyword(s):  
Egg Parasitoid ◽  
Trichogramma Evanescens ◽  
Rice Moth

scholarly journals Performance Of Trichogramma Evanescens Westwood Egg Parasitoid Against Angoumois Grain Moth, Sitotroga Cereallela. (Olivier)

2015 ◽  
Vol 41 (1) ◽  
pp. 95-103
Author(s):  
T Al Akter
Keyword(s):  
Biological Control ◽  
Egg Parasitoid ◽  
Trichogramma Evanescens ◽  
Positive Correlation ◽  
Angoumois Grain Moth ◽  
Adult Parasitoid

The performance of Trichogrammaevanescens Westwood egg parasitoid againstAngoumois grain moth, Sitotrogacereallela. (Olivier) was investigated during theperiod from January 2011 to May 2011. The results showed that the highest per cent ofadult parasitoid emergence (98.94%) from parasitized eggs of S. cerealella was by T.evanescens. The duration of adult parasitoid emergence varied from 7-8 days. Thelongevity of T. evanescens adult that emerged from parasitized eggs varied from 3-4days. In consideration of rate of parasitization by using different number of parasitoids,the highest (98.00%) parasite eggs were recorded from 50 pairs of parasitoids whichwas statistically identical (94.25%) with 35 pairs and followed (93.25%, 92.75% and92.25%) by 25, 20 and 15, pairs respectively. The rate of parasitism increased withincreased number of parasitoids. A positive correlation exists between per centparasitism and adult parasitoid emergence from parasitized eggs. It reveals that the T.evanescens has potential in the biological control of Angoumois grain moth, of S.cerealella. Asiat. Soc. Bangladesh, Sci. 41(1): 95-103, June 2015

Uscana lariophaga (Hymenoptera: Trichogrammatidae), an egg parasitoid of bruchid beetle (Coleoptera: Bruchidae) storage pests in West Africa: host-age and host-species selection

1991 ◽  
Vol 81 (1) ◽  
pp. 65-76 ◽  
Author(s):  
A. van Huis ◽  
M. G. Wijkamp ◽  
P. M. Lammers ◽  
C. G. M. Klein Goldewijk ◽  
J. H. van Seeters ◽  
...  
Keyword(s):  
West Africa ◽  
Host Species ◽  
Insect Pests ◽  
Egg Parasitoid ◽  
Species Selection ◽  
Choice Situation ◽  
Host Age ◽  
Storage Pests ◽  
Parasitization Rate ◽  
The Difference

AbstractUscana lariophaga Steffan is an egg parasitoid of bruchid species in West Africa. The hosts are Callosobrucbus maculatus (Fabricius) and Bruchidius atrolineatus Pic, insect pests of stored cowpea. Experiments were carried out to study the selection between hosts of different ages and of different species in choice and no-choice situations. Results were obtained through parasitization studies and by direct behavioural observations. A description of the parasitization behaviour of Uscana lariophaga is given. At 30°C, C. maculatus eggs of 0–2 day old are readily accepted for parasitization, but in a choice situation the 0 day old eggs are preferred. Of the older eggs only those of 3 days old are parasitized but significantly less than those of 0–2 days. At 30°C, B. atrolineatus eggs older than 24 hours are significantly less parasitized than younger eggs also in the no-choice situation. When eggs are older than one day, the time needed for penetrating the egg increases with host age. Both bruchid species are suitable hosts for U. lariophaga. In a choice situation B. atrolineatus is the preferred host and especially so when U. lariophaga has been reared on this species. However, in a no-choice situation the highest rate of successful parasitization is obtained on hosts of the species from which they have been reared. The higher parasitization rate of C. maculatus in the field in Niger can be explained by the difference in the susceptible period between the two host species.

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