Main Article: Mango Shoot Borer
Mango Shoot Borer or scientifically, Chlumetia transversa is a very serious pest of mango (Mangifera indica). It is a serious insect of all stages of mango plant/tree.
Its attack in a single plant is less. But mango orchards are seen to have an excessive invasion of it. 100% of mango plants can be seen affected by the pest in a mango orchard.
Apart from mango, this pest also cause damage to other species of fruit plants. Hence, it is a very important insect/pest of horticulture fruit crops.
In this post we will know about the life cycle, symptoms of damage and management of the post.
|Common Name||Mango shoot borer, Mango leaf webber|
|Scientific Name||Chlumetia transversa|
|Main Host||Mango plant/tree|
|Other Hosts||Litchi (Litchi chinensis)|
|occurrence||Tropical and Sub-tropical regions of mango growing|
|1.||Introduction: Mango Shoot Borer|
1. Introduction: Mango Shoot Borer
It is distributed across the world (tropical and subtropical countries where mango is grown/planted. In india it is found in each mango growing states.
Caterpillar: Caterpillar is greenish.
Adult: Adult is a gray moth.
Legs and prolegs are short.
The 5th instar is pinkish.
1. Single egg is laid on tender leaves by adult female.
2. Hatching occurs in 2 – 3 days.
3. Now caterpillars start to bore.
4. Newly hatched caterpillars bore into shoots near the growing point.
5. They start tunnelling downwards.
6. Doing so they throw their excetra out of entrance hole.
7. Pupation: The full-grown larva starts pupation in one of the following places-
1. Slits and cracks in the bark of the tree.
2. Dried malformed inflorescences.
3. Cracks and crevices in the soil.
Pupation takes 12 – 16 days. The life cycle lasts for one to one and half month.
1. Damage is done by young larvae.
2. They bore into growing shoots as well as on midrib of the leaves.
3. Abscission of leaves starts in affected shoots.
4. Affected shoots dries up.
5. Leaves can be seen falling down.
Nature of Damage
Severe webbing can be seen. Flowering and fruiting are affected. Webbing can be seen in each part of the tree. Management id difficult.
Young trees are also severely affected by the pest. It can be seen in a big mango orchard. The entire trees of an orchard are attacked by the insect.
Grafted Mango Plants
Grafted mango plants are severely affected. The severely affected, grafted plant, may even die.
Symptoms of Damage
Leaves: Webbing by larvae can be seen in leaves. Leaves are dried. Abscission accurs.
Shoots: Affected, upper shoots dries up.
1. The parasitoid Megaselia chlumetiae is known to parasitize shoot borer caterpillars.
2. It is a larvae.
2. It lays eggs on the integument of the caterpillar.
4. The larvae inters and feed on caterpillar’s internal tissues.
5. Pupation occurs within the dead caterpillar.
Non-chemical Method or Mechanical Approaches
1. Larvae should be destroyed by hand picking.
2. Webbed leaved should be removed.
3. Dried shoots should be removed.
The moth is attracted by the light. A tub filled with chemical like carbaryl should be placed beneath the light trap.
Different kinds of chemicals can be applied against the pest.
1. Carbaryl: 50 wp carbaryl should be used.
2. Other chemicals are- quinalphos, cypermethrin, momocrotophos, endosulfan (banned in India and some other countries).
Also Read: Photos/Images: Red Gram Insects-Pest
1. 1863: The pest was first identified and described by Francis Walker.
Last Updated: 31-03-2021
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