Journal of Pest Science (2006) 79, 83-87

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Abdul Nasser Trissi, Mustapha El Bouhssini, Joumaa Ibrahem, Mohammed Abdulhai, Bruce L. Parker, William Reid and Fouad Jaby El-Haramein (2006)
Effect of egg parasitoid density on the population suppression of Sunn Pest, Eurygaster integriceps (Hemiptera: Scutelleridae), and its resulting impact on bread wheat grain quality
Journal of Pest Science 79 (2), 83-87
Abstract: The impact of the density of Sunn Pest egg parasitoids, Trissolcus grandis Thomson (Hymenoptera: Scelionidae), at three levels of Sunn Pest, Eurygaster integriceps Puton (Hemiptera: Scutelleridae), infestation was assessed on bread wheat variety Cham 6 in screened cages in the field for percentage of egg parasitism and grain quality. Percent parasitism ranged from 60.1 to 83.9%. No statistically significant differences were detected at parasitoid densities of 1, 2, or 3 insects per square meter at Sunn Pest densities of 2 or 4 insects per square meter. The quality of grain collected from all Sunn Pest infested cages without egg parasitoids was unacceptable for baking purposes and was significantly lower than grain from both non-infested plots and plots where either two or three egg parasitoids were present. The abundance of egg parasitoids in Al Hassakeh province in Syria was also determined. Egg parasitism was observed 1 week after the initiation of Sunn Pest oviposition and ranged between 22 and 59% in non-insecticide treated fields, while no parasitoids were recovered from insecticide treated areas within the same region. The impact of feeding by Sunn Pest on different wheat stages indicated that only feeding prior to the spike stage does not affect the bread-making quality of the grain.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Mustapha El Bouhssini, Bruce L. Parker

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
damage/losses/economics
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution
surveys/distribution/isolation


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Eurygaster integriceps Wheat (Triticum) Syria
Trissolcus semistriatus (parasitoid) Eurygaster integriceps Wheat (Triticum) Syria