Abstract
Field trials were conducted to investigate the infestation levels with the greater date moth, Arenipses sabella Hampson (Lepidoptera: Pyralidae)on the bunches and fruits of two common date palms (Saidi and Tamr ) and the cereal cultivar (Mantor) in four Districts (El-Kharga, Paris, Balat and Mut) at the New Valley during 2015&2016 seasons. Data of the two successive seasons in El-Kharga Oasis indicated that, Saidi (economic cultivar) was more preferred to attack by the greater date moth than Mantor. The average percentages of the cut bunch bases (CBB) which lead to loss the bunch fruits and express about the economic damage were (10.89 and11.20%) on Saidi and (3.08 and 2.00%) on Mantor, respectively. The fruit damage for both cultivars was not noticeable. Under Mut district, the symptoms of damage by the greater date moth was different where, the pest prefer to attack the fruit than bunch bases. The larvae was seldom feed on bunch bases of Tamr cultivar where it recorded (0.27 and 0.22%) on Tamr and (6.67and 13.02%) on Saidi and the direct date fruit losses were (20.87 and 26.23 %) on Saidi and (47.21 and 44.62%) on Tamr during 2015 and 2016, respectively. The chemical analysis indicated that, Tamr bunch bases obtained highly Calcium and Potassium percentages (0.14 and 1.54%) than Saidi (0.12 and 1.38%), respectively. Meanwhile, the percentages of total protein and total carbohydrate (4.18 and 23.18%) were high in Saidi bunch bases than Tamr, respectively. Tamr fruits obtained highly total carbohydrate, Calcium, and Potassium percentages (61.62, 0.26 and 2.65%) than Saidi fruits (57.30, 0.14 and 1.69%), respectively. There was no significant ratio in the case of total protein. Concerning to the incidence of A.sabella on Saidi variety across the four districts, this cultivar suffered from attacks with different levels.Above 80% of the tested Saidi date palm was infested.The general cut bunch bases (CBB) (about 11.00 %) was observed in El-Kharga. In Mut district,zero damage effect was obtained on the Saidi bunches and over than 20% of the Saidi fruits was lost directly. In general, greater date moth has a large capacity to spread and infest all tested date palm under the New Valley conditions, where the average of infestation exceeded eighty percent making it one of the most important pests affecting date palm production in this governorate. Further ecological and biological studies on A. sabella to develop integrated pest management to combat this pest.
Highlights
The New Valley is located in the southwestern portion of the western desert ofEgypt
Date Palm Host Preference of The Greater Date Moth, Arenipses sabella Hampson 223 four Districts to study the status of the infestation with A. sabella on three date palm cultivars during 2015&2016 seasons
Three date palm cultivars were examined to the infestation with the greater date moth in the New Valley Governorate during 2015 and 2016 seasons
Summary
The New Valley is located in the southwestern portion of the western desert ofEgypt. The area is about 376505 square kilometer, which represent 37.6% of the total area of Egypt and about 56% of Egypt's western desert area. The New Valley is located in the southwestern portion of the western desert of. The area is about 376505 square kilometer, which represent 37.6% of the total area of Egypt and about 56% of Egypt's western desert area. Agriculture in the New Valley Governorate is entirely restricted to five districts (El-Kharga, Paris, Balat, Mut and Farafra) in addition to East Ewinate area. Date palm (Phoenix dactylifera) is considered the most important cash crops in the New Valley Governorate. More than 1.8 million date palm trees are grown. The main cultivars are Saidi (semi-dry date), Tamer (dry date) and Mantor (cereal date). The prevailing climatic condition is considered ideal for growing and fruiting of date palm
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