The banana double black banded weevil, also known as the banana pseudostem weevil, belongs to the coleoptera family as the banana weevil. The adult morphology is similar to that of a banana weevil , but the body is slightly larger than a banana weevil , with a shiny reddish brown or black reddish brown on the back , and a black longitudinal stripe on both sides of the thorax.
Banana double black banded weevil is widely distributed in various banana producing areas in South China, and can occur in 4 to 5 generations per year in South China, with overlapping generations, and the insect population density is the largest from May to July, which is the most serious. In winter, all kinds of insect states can overwinter, but most of them are larvae. Adults prefer to live in moister pseudostems, are nocturnal, and have a pseudo-death nature. Adults lay eggs in spaces within the surface leaf sheath tissue, which are often filled with transparent colloids. The surface of the leaf sheath at the spawning site is usually visible with tiny scars and water stains, which later turn brown spots with a small amount of colloidal spillage on the surface. The larvae feed up and down in the false stem, up and down to the root head, but the middle and upper parts of the false stem are more numerous, and can also moth the middle midrib.
Banana double black banded weevil control method:
1, the implementation of banana seedling quarantine, to prevent banana weevil with the germination of seedlings spread, it is best to use test tube seedlings as planting materials to eliminate insect sources.
2. Clearing the garden and artificial hunting. Banana orchards should be cleared frequently and kept clean. Dig out the old stump stems, old banana heads and circle the banana (that is, cut off the dead leaves) in time, and circle the banana once every 1 to 2 months before harvesting. Dried leaves and leaf sheaths that are infested with the insect should be buried deep or burned. Combined with Qingyuan, the object armor can be artificially hunted.
3. Pharmaceutical prevention and treatment. 5 to 10 grams of furandan are applied to the planting hole before planting; when there are many insect mouths, 3% furandan is applied to the soil cavity in the afternoon, 5 to 10 grams per plant; insecticides such as 1000 times of dichlorvos emulsion are infused between the petioles of the banana to kill adults and larvae; in the depression where the base of the petiole is connected to the false stem, a small amount of tea bran or furandane and other endorbic insecticides are added.
4. Biological control. Beetles are natural enemies of banana weevils that can burrow into banana stems to prey on their larvae and should be protected and utilized. Poultry are stocked in banana orchards to peck at the larvae and adults of banana weevils.
Source: Banana Industry Alliance
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