Andraca

The genus Andraca belongs to the Drepanidae family, order Lepidoptera. The most prominent species is Andraca bipunctata, commonly known as the tea moth or tea hook-tip.

Adults are small moths with a wingspan of approximately 40–50 mm. They exhibit brownish or grayish coloration with a characteristic dark, prominent spot in the center of their forewings.

The larvae of this pest undergo several developmental stages (instars). In their later stages, they are distinctively colored, often featuring dark bands or spots that facilitate camouflage against branches.

The lifecycle consists of complete metamorphosis: egg, larva, pupa, and adult. Overwintering typically occurs in the pupal stage within cocoons attached to the undersides of leaves or twigs.

Adult moths are primarily nocturnal, making them difficult to detect without the use of light traps during the evening hours.

The primary host for this pest is the tea plant (Camellia sinensis). Larvae can cause substantial economic losses to commercial tea plantations.

As active leaf-chewers, the larvae can cause total defoliation during mass outbreaks, leaving behind only the tough leaf veins.

Damage to the foliage leads to reduced photosynthetic capacity, which negatively impacts the yield and quality of the tea harvest.

Weakened plants are more susceptible to secondary infections and fungal diseases, which can eventually lead to the loss of individual tea bushes.

In tea-growing regions, such as parts of India and China, Andraca is considered a serious pest that requires constant management to prevent widespread infestation.

Pest activity is closely linked to climatic conditions and tea growth cycles. Population peaks usually occur during the warm, growing season.

The first generation of larvae typically emerges with the onset of warmer temperatures when new foliage is present on the tea bushes.

Generations can overlap throughout the season, leading to continuous pressure on the plants if the environmental conditions remain favorable.

In tropical regions without a distinct winter, reproduction may continue year-round with only minor periods of diapause.

Agronomists recommend monitoring plantations every 7–10 days during the peak growing season to catch early signs of pest proliferation.

The first visible sign of an infestation is the presence of chewed leaf margins, starting from the upper canopy of the bush.

Small, dark granular droppings found on the leaves or underneath the bush are a definitive sign of active feeding by the larvae.

The presence of silken webbing, used by larvae to pull adjacent leaves together for protection, is another common indicator of Andraca activity.

Upon closer inspection, one can find the larvae themselves, which often rest along the midrib of the leaf or on the stem, blending perfectly with the bark.

General yellowing and premature leaf drop are signals of critical infestation levels that require immediate intervention.

Manual removal of larvae and pruning of infested shoots is highly effective for localized infestations in smaller gardens.

Biological control using Bacillus thuringiensis-based products provides effective regulation of larval populations without harming beneficial insects.

Chemical control involves the use of contact-stomach insecticides, provided that strict pre-harvest intervals are followed to ensure consumer safety.

Integrated pest management includes maintaining vigorous plant health, timely pruning, and systematic weed control to eliminate pupation sites.

• Monitoring with pheromone traps to track population spikes.
• Encouraging natural predators such as birds and predatory beetles.
• Strict quarantine protocols for imported planting material.