Ponte Academic Journal Dec 2020, Volume 76, Issue 12 |
EFFECT OF CLIMATIC FACTORS ON THE EVOLUTION OF THE WHITE DATE PALM SCALE PARLATORIA BLANCHARDI AT BISKRA OASIS, ALGERIA Author(s): Mehenni Mokhtar ,Tarai Nacer J. Ponte - Dec 2020 - Volume 76 - Issue 12 doi: 10.21506/j.ponte.2020.12.17 Abstract: Abstract
The date palm is the main agricultural base in the southern region of the Saharan Atlas,
Algeria and especially at Biskra , Algeria .This crop is threatened by insect pests, such as the
white date palm scale Parlatoria blanchardi (Targioni-Tozzetti, 1868) (Hemiptera?Diaspididae). This devastating pest causes premature dryness of the date palm trees, and
leads to total loss of the palm. During this study, the white date palm scale completes four
cycles or four generations per year. The first generation occurs in early summer during the
two study seasons, 2017 and 2018. The second generation is mentioned in mid-July in 2017
and mid-August in 2018. The third generation appears at the end of September in 2018 and
mid-October,2018. The fourth generation is mentioned at the end of December in 2017 and
mid-January in 2018.
Keywords
Date palm, Biskra, oasis, date scale, population , dynamic, temperature, humidity
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