Trapdoor spiders (Ctenizidae)
Systematic position: The family Ctenizidae belongs to the order Araneae (spiders). These arachnids are well-known for their unique architectural skills, creating silk-lined burrows equipped with hinged doors that provide excellent camouflage and safety for the inhabitant.
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Trapdoor spiders (Ctenizidae)
Affected crops: It is crucial for agronomists to recognize that trapdoor spiders are obligate predators, not herbivores. Consequently, they do not feed on any parts of agricultural crops and pose no direct threat to grains, vegetables, or ornamental plants grown in the field or nursery.
Biology and life cycle: The life cycle of Ctenizidae is deeply rooted in subterranean life. Adult females are sedentary, spending their entire lives within their burrows. They feed on insects and small invertebrates that wander near the entrance. Their reproductive rate is relatively slow, and their development spans several years.
Nature of damage: As predators, trapdoor spiders do not cause damage to plant tissues. They do not feed on roots, stems, or foliage. Their presence is generally a sign of a healthy and undisturbed soil ecosystem, and they do not negatively impact agricultural productivity or yield quality.
Control measures: No control measures are required for Ctenizidae in an agricultural setting.
- They serve as natural biological control agents by preying on other soil-dwelling invertebrates.
- Avoiding the use of broad-spectrum soil insecticides helps preserve these beneficial arachnids.
- They do not require management or mitigation strategies on commercial farms.