Threshold Temperatures and Thermal Requirements for the Development of the Olive Leaf Moth; Palpita unionalis Hbn. (Lepidoptera: Pyralidae)
Dahi, H., Ibrahim, W., . Mansour, A., Imam, A. (2017). Threshold Temperatures and Thermal Requirements for the Development of the Olive Leaf Moth; Palpita unionalis Hbn. (Lepidoptera: Pyralidae). EKB Journal Management System, 10(3), 81-88. doi: 10.21608/eajbsa.2017.12655
Hassan F. Dahi; Walaa G. Ibrahim; Amany N. . Mansour; Ahmed I. 2 Imam. "Threshold Temperatures and Thermal Requirements for the Development of the Olive Leaf Moth; Palpita unionalis Hbn. (Lepidoptera: Pyralidae)". EKB Journal Management System, 10, 3, 2017, 81-88. doi: 10.21608/eajbsa.2017.12655
Dahi, H., Ibrahim, W., . Mansour, A., Imam, A. (2017). 'Threshold Temperatures and Thermal Requirements for the Development of the Olive Leaf Moth; Palpita unionalis Hbn. (Lepidoptera: Pyralidae)', EKB Journal Management System, 10(3), pp. 81-88. doi: 10.21608/eajbsa.2017.12655
Dahi, H., Ibrahim, W., . Mansour, A., Imam, A. Threshold Temperatures and Thermal Requirements for the Development of the Olive Leaf Moth; Palpita unionalis Hbn. (Lepidoptera: Pyralidae). EKB Journal Management System, 2017; 10(3): 81-88. doi: 10.21608/eajbsa.2017.12655

Threshold Temperatures and Thermal Requirements for the Development of the Olive Leaf Moth; Palpita unionalis Hbn. (Lepidoptera: Pyralidae)

Egyptian Academic Journal of Biological Sciences. A, Entomology
Article 10, Volume 10, Issue 3, May 2017, Page 81-88  XML PDF (290.73 K)
Document Type: Original Article
DOI: 10.21608/eajbsa.2017.12655
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Authors
Hassan F. Dahi1; Walaa G. Ibrahim1; Amany N. . Mansour2; Ahmed I. 2 Imam2
1Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt.
2Plant Protection Department, Desert Research Center, El Matariya, Cairo, Egypt.
Abstract
Olive leaf moth, Palpita
unionalis (Hubner) (Lepidoptera: Pyralidae) is one of the dangerous pests
attacking sapling olive trees and nurseries, tender shoots and ripening fruits
inducing economic losses. Accordingly, great efforts were dedicated to reduce
its infestation. The current study aimed to calculate temperature thresholds (t0)
and accumulated heat units (dd’s) for each stage of this pest as a primary step
for developing a forecasting system that will help to define the most precise
time for different control programs. The insect was reared under three
constant temperatures (17, 22 and 27°C each ± 1°C). The time required for
development through egg, larva, pupa and pre-ovipostion increased at lower
temperatures. The lower thresholds of development (t0) were 8.39,
11.46, 13.38 and 12.70°C for eggs, larvae, pupae and pre-oviposition period,
respectively. The average accumulated heat units required for their development
were 61.07, 238.81, 113.68 and 38.17 degree-days. On the other hand, the lower
threshold of development (t0) to complete a generation was 12.04°C
and the average accumulated heat units required for its development was 443.07
degree-days
Keywords
Olive leaf moth; Palpita unionalis; accumulated heat units (degree-days); temperature threshold (t0)
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