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- W2007018265 abstract "Abstract Seasonal studies on the population density of the cottony‐cushion scale Icerya purchasi Mask on Stercholia diversifolia trees, at Giza province, showed a period of abundanec extending between April and December, during that period 4 peaks were obvious denoting the occurrence of a possible four generations. The lengths of the 4 estimated generations ranged from 12 to 14 weeks. The distribution of this scale insect showed its tendency to occupy the east‐northern side of the host‐plant tested. If this would be the same with all the major host‐plants of this pest the east‐nothern side of the trees should be concentrated upon, whenever chemical control measures were applied. The age structure in this insect's population indicated a regular “Pyramid shaped” pattern. Zusammenfassung Verbreitung und Abundanz von Icerya purchasi Mask. auf Stercholia diversifolia‐Bäumen in ägypten Populationsanalytische saisonale Studien bei I. purchasi auf Stercholia ‐Bäumen in der Provinz Giza ergaben eine Erscheinungs‐Periode von April bis Dezember. Vier Dichte‐Maxima während dieser Zeit markierten das Auftreten von 4 Generationen jährlich, deren jede 12 bis 14 Wochen dauerte. Die Verbreitung der Schildlaus zeigte die Tendenz zur Besiedlung der östlichen und nördlichen Seite des Wirtsbaumes. Sollte diese Verteilung sich als generell erweisen, müßte darauf bei der Bekämpfung Rücksicht genommen werden. Der Altersaufbau der Population entsprach der regulären Alterspyramide." @default.
- W2007018265 created "2016-06-24" @default.
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- W2007018265 date "1974-01-12" @default.
- W2007018265 modified "2023-10-16" @default.
- W2007018265 title "Distribution and abundance of Icerya purchasi Mask. on Stercholia diversifolia in Egypt" @default.
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- W2007018265 doi "https://doi.org/10.1111/j.1439-0418.1974.tb03233.x" @default.
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