| Titles |
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English :
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Studies on predatory insects attacking purple and florida red scales on orange trees
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Arabic :
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دراسات علي بعض المفترسات الحشرية التي تهاجم حشرة الموالح المحاريه والحشرة القشرية السوداء علي أشجار البرتقال
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| Abstract |
The efficiency of predator insects of the diaspidid species, Lepidosphes beckii New and Chrysomphalus aonidum populations (Linn.) was evaluated on orange trees during the two successive seasons 1996/1997 and 1997/1998.
During the course of study, five predators were found associated with the purple scale, L. beckii and Florida red scale, Ch. Aonidum populations on the infested orange leaves. Chiloconrus bipustulatus was the main dominant predator, it had two peaks of abundance on May and October, while the other predators showed two peaks of abundance in spring and autumn in both years of study.
Predators attacking L. beckii recorded three periods of activity annually in spring summer and autumn, respectively. The lowest activity period was in winter. The percentage of predation all over the year was 9.5 ± 3.6 and 10.6 ± 4.0% for the first and second year, respectively. Meanwhile, it showed two periods of activity on C. aonidum during spring and autumn. The percentage of predation all over the year was 9.3 ± 3.0 and 9.4 ± 3.5% for the first and second year, respectively.
Ch. Bipustulatus adults showing relatively higher searching rate in comparison with C. indecimpunctata under laboratory and field conditions. In addition to C. undecimpunctata exhibited relatively higher matual interference values than Ch. bipustulatus.
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| Publication year |
2002
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| Pages |
1247-1264
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| Availability location |
معهد بحوث وقاية النباتات - 7 شارع نادى الصيد - الدقى- الجيزة
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| Availability number |
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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. F. Agric., Mansoura Univ.
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| ISSN |
1110-0346
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| Department |
Horticulture Insects
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| Author(s) from ARC |
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| External authors (outside ARC) |
ليلي عبد الستار البطران
كلية الزراعة-جامعة المنصورة
عبد الستار ابراهيم عبد الكريم
كلية الزراعة-جامعة المنصورة
حسن محمد فتحي
كلية الزراعة-جامعة المنصورة
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| Agris Categories |
Pests of plants
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AGROVOC
TERMS |
Chilocorus.
Chrysomphalus.
Citrus sinensis.
Fruit trees.
Leaves.
Lepidosaphes beckii.
Predation.
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| Publication Type |
Journal
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