| Titles |
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English :
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Evaluation of certain parasitoids and predators against aphids, white fly and leafminer infesting cucumber and pepper in green houses
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Arabic :
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تقييم لبعض الطفيليات الداخلية والمفترسات ضد حشرات المن والذباب الأبيض وصانعات الأنفاق التي تصيب محصولي الخيار والفلفل في البيوت المحمية
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| Abstract |
A biological control programme was evaluated compared to chemical control against aphids (mainly Aphis gossypii), the whitefly, Bemisia tabaci and the leafminer, Liriomyza trifolli infesting cucumber and pepper in greenhouses. The bio-control agents were the braconid parasitoid, Aphidius colemani, the cecidomyiid predator, Aphidoletes aphidimyza and the anthocorid predator, Orius laevigatus against aphids; the aphelinid parasitoids, Eretmocerus eremicus and E.mundus and the mirid predator, Macrolophus caliginosus against the whitefly; the braconid parasitoid, Dacnusa sibirica and the eulophid parasitoid, Dygliphus isaea against the leafminer. Percentages of infestation by A.gossypii was higher and its occurrence was most dominant in the bio-control greenhouse (BCG) than in the chemical control greenhouse (CCG). Percentages of parasitism were much higher in the BCG and reached 96 % on cucumber and 100 % on pepper. Infestation by B.tabaci was not dominant in both greenhouses and both crops especially on pepper. The numbers of nymphs / leaf on cucumber were much higher in the BCG than in the CCG. Parasitism was noticed only once, on cucumber, in the BCG but before releasing the parasitoids. Infestation by L.trifolli on cucumber was found to be more frequent with a higher peak in the CCG than in the BCG. Parasitism in the BCG was 50 % one week after releasing the leafminer parasitoids and no parasitism was noticed in the CCG. As a conclusion, the bio-control agents seemed to have a role in suppressing the populations of A.gossypii and L.trifolli but had no or little effect against B.tabaci. The probable reasons for this failure is given. However, the yield of the crop, cucumber or pepper, in the BCG did not differ significantly from that in the CCG .
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| Publication year |
2005
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| Pages |
3439-3447
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| Organization Name |
Plant Protection Research Institute (PPRI)
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| City |
المنصورة
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| serial title |
J. Agric. Sci., Mansoura Univ. Egypt
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| ISSN |
1110-0346
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| Department |
Biological Control
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| Author(s) from ARC |
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| Agris Categories |
Pests of plants
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AGROVOC
TERMS |
Agromyzidae.
Aleyrodidae.
Aphidoletes aphidimyza.
Aphis gossypii.
Bemisia tabaci.
Cucumbers.
Macrolophus caliginosus.
Orius.
Parasitoids.
Pepper.
Predators.
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| Publication Type |
Journal
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