State Size Features
Larva Up to 13-15 mm Brown color with pink rings between your body segments. The head is dark almost black.
Adult 15 mm (Wing wing) Practically rectangular, gray front wings with darker stripes. The later ones are gray, with the shape of a roof being at rest.
Winter spends as a larva, in holes in the bark or in small holes that the larva itself digs in the tree, usually in the branches, which it protects with silk threads and bark remains.
At the beginning of the spring, even from January if the winter is mild, the larvae leave their shelters to enter inside the buds or buds if there already are.
After completing its development, pupa inside a silk cocoon in the foliage itself, usually between two leaves, appearing the first adults in late spring. These reproduce and the female verifies the laying, depositing the eggs individually, which are whitish at the beginning and orange-yellow once mature. At two weeks the caterpillars appear, at which time there are already fruits on the tree, which are attacked by these caterpillars, digging food galleries inside. In the same way, they continue to feed on shoots.
There will be two more generation of caterpillars: a second in the month of August, and a third in September-October. In this way winter will pass, thus closing the life cycle of this species.
Symptoms / Damage
Penetrates the fruit digging galleries, which rots. The most important damages are in peach trees, especially in late varieties. The damage can go unnoticed in storage, because the caterpillar can penetrate the area of the peduncle towards the bone, reaching the market the worm.
Destruction of buds, deepen inside and empty them.
Sprouting desiccation, when introducing the caterpillars inside. This damage does not affect production practically, and is only of interest in young plantations, newly grafted or nursery plants. The symptom is very characteristic, appearing dry and arched buds.
In almond the damages are minor, since although the insect damages the pulp, the useful part is the seed. In this case, the only damage in fruit is some premature fall, since it accelerates the maturation, as well as a slight loss of quality of the affected fruits.
This plague can be confused with oriental moth (grafolita or cydia), which has similar symptoms, and affects the same range of hosts, although the Eastern moth larvae do not have clear rings between the segments of the body. In addition, anarsia tends to penetrate the fruit peduncle area.
Before flowering, after pruning.
Spraying based on: piriproxifen (except in apricot and almond), fenoxicarb (allowed in all the fruit trees of bone and nugget), methyl-chlorpyrifos (only in peach and pip fruit), chlorpyrifos (only in peach). It is advisable to wet all the wood of the tree very well to ensure the contact between the pesticide and the insect.
Normally this application is part of the complete winter treatment, mixing the insecticide chosen with an oil and a fungicide (copper oxychloride). This treatment is very common and serves to combat red spider, aphids, anarsia, dent and louse of San José.
Treatment in vegetation
From sprouting (mid-February) to harvesting, after exceeding the thresholds of damage or catches in traps.
Spraying with an authorized pyrethroid in culture: beta-cyfluthrin, cyfluthrin or lambda cyhalothrin.
With this treatment, other pests are controlled in parallel, such as carpocapsa and oriental moth. It is not advisable to abuse these active substances, since their indiscriminate use can lead to the proliferation of other pests, such as red spider mites, for example.
The treatment thresholds established for Anarsia lineatella are those treated after exceeding 7% of affected shoots, or with more than 1% of fruits attacked. In practice, it means that if they find fruits with damage, they should be treated, especially in the 5 weeks that precede harvesting.
In plots where the previous season caused significant damage, it may be advisable to give a pass in mid-February, after flowering, in order to reduce the damage in buds and freshly set fruits.
- Cultural measures
Monitoring based on polil