Comprehensive Guide to Combating the Olive Moth and Monitoring its Stages
Comprehensive Guide to Combating the Olive Moth and Monitoring its Stages
The olive tree is a fundamental pillar of the Syrian agricultural sector. However, it faces continuous threats from various insect pests, most notably the "Olive Moth." The Ministry of Agriculture and Agrarian Reform (Directorate of Agricultural Extension and Rural Development) published an instructional guide outlining the nature of this insect, the damage it causes, and mechanisms for monitoring its different stages to protect the crop and ensure its quality.
Insect Definition and Habitat
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Ecological Classification: A Mediterranean insect found in Central Asia.
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Local Distribution: Spread across most olive-growing regions in Syria.
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Life Cycle: The insect goes through three successive generations during a single agricultural season.
Economic Damage Caused by Infection
The olive moth causes severe damage that affects the crop at various growth stages, including:
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Flower Destruction: Destroying large numbers of flower buds, which reduces fruit-setting rates.
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Fruit Drop: Infested fruits drop starting from late August due to the completion of the predatory generation and its direct feeding on the seed embryos.
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Quality Degradation: Infested fruits become completely unsuitable for processing or pressing.
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Germination Failure: Seeds from infested fruits become incapable of future flowering or germination.
Monitoring Insect Stages and Follow-up Mechanisms
Integrated management of this pest requires careful monitoring of each of its three generations to determine the economic threshold that warrants therapeutic intervention:
1. The Leaf Generation (Phyllophagous)
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Inspection Method: Inspecting leaves that are one year old.
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Objective: Investigating eggs and modern galleries created by larvae immediately after hatching.
2. The Flower Generation (Anthophagous)
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Adult Insect Monitoring: Done by hanging pheromone traps at a rate of (2 to 5 traps) per hectare. Hanging begins in early March in coastal areas and early April in interior regions.
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Larvae Monitoring: Flower buds are carefully inspected to determine the number of live larvae in (100) flower clusters.
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Economic Threshold: The pest is considered to have exceeded the critical limit and requires control when the number of larvae reaches (10 live larvae per 100 flower clusters).
3. The Fruit Generation (Carpophagous)
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Inspection Method: Inspecting newly set olive fruits when they reach the size of a lentil seed or larger.
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Objective: Investigating the presence of larvae in the calyx area.
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Economic Threshold: Intervention is required when recording (10 live larvae per 100 fruits) inspected.
The scientific bodies at the Ministry of Agriculture (The Olive Office and the Agricultural Media Department) urge farmers to visit the nearest agricultural extension unit in their region to obtain technical support and proper spraying schedules
11/5/2026
