Nanne HW, Klink JW, 1975. The weevils are nocturnal and hide during the day in or around corms or in moist areas near the plant and in the trash. Black weevils attack the base of the pseudostem and tunnel upward whereupon a jelly-like sap oozes out from the entry point. Banana weevils are attracted to cut rhizomes, making suckers used as planting material especially susceptible to attack. Demonstration and study of the symbiotic bacteria in two weevil pests of banana: Cosmopolites sordidus (Germar) and Metamasius hemipterus (L.) (Col. Curculionidae). The banana weevil Cosmopolites sordidus (Germar) is an important pest of banana crops. Attack in newly planted banana stands can lead to crop failure. The newly emerged weevil is reddish brown but soon becomes uniformly dull black. However, for a better understanding of the epidemiological process more information on the movement at a finer scale is needed. There are two types of banana weevils which cause damage to the pseudo stem (stem weevils) and corm (corm or Rhizome weevils). Adult weevils are about 10-12mm long, hard shelled and have the pronounced snout typical of weevils. In established fields, weevil damage can result in reduced bunch weights, mat die-out and … Turrialba, 25(2):177-178. Rhizome weevil: Cosmopolites ... Banana corm split trap. Consequently, in this study, we evaluated whether plant defence substances in the rhizome … For more details click this link: A novel method for effective control of Weevil attacks in Banana plants. Cosmopolites sordidus, commonly known as the banana root borer, banana borer, or banana weevil, is a species of weevil in the family Curculionidae.It is a pest of banana cultivation and has a cosmopolitan distribution, being found in all parts of the world in which bananas are grown. Banana weevil attack has been reported to interfere with root initiation, kill existing roots, limit nutrient Pest status may vary across sites Reducing banana root weevil adults from an established banana plantation. Soil incorporation at the time of planting: carbofuran 3 G 10g, phorate 10 G 5 g/plant. Radio-tracking and capture-recapture studies at the scale of the field have revealed a limited capacity of dispersion of the banana weevil. Larvae bore into the plant and feed on the stem and corm tissues, making tunnels. Regards, W eevil problems appear to be most severe in plantains, highland cooking bananas and ensete. Rake the soil around the rhizome and apply through drenching 2 gm / litre Carbaryl or 0.03% Chlorpyriphos or 10 g / plant Carbofuran 3G or 10 gram / plant Phorate 10G two times at 10 days interval followed by tight watering. It is considered the most serious insect pest of bananas. Each year 25–75% of banana and plantain yields are lost because of rhizome damages caused by banana weevil (Cosmopolites sordidus) in growing regions of sub‐Saharan Africa.However, the specific plant defence response of the rhizome tissue in relation to the C. sordidus attack is unknown. The larvae bore in the corm, reducing nutrient uptake and weakening the stability of the plant. Before planting, the suckers should be dipped in 0.1 per cent quinalphos emulsion. Trap adult weevils with pseudostem chopped into small pieces; kept near infested clump at 65/ha. Banana weevils are a major constraint for banana cultivation. Banana Rhizome Weevil Cosmopolites sordidus (Sinhala: Kesel Gulla; Tamil: Vaalai neelmonchi vandu) Adult rhizome weevil (www.cookislands.bishopmus eum.org) plant) Ooze out from the damage holes (www.nrch.res.in) infested fields Damage tunnels in rhizome (www.infonet-biovision.org) Prevention Monitoring Direct Control Direct Control Restrictions Nardon P, Louis C, Nicolas G, Kermarrec A, 1985. The banana weevil Cosmopolites sordidus (Germar) is the most important insect pest of bananas and plantains (Musa spp.). The banana rhizome weevil evolved in Southeast Asia has spread to all banana and plantain production regions in the tropics and subtropics. Weevils – The black weevil (Cosmopolites sordidus) or banana stalk borer, banana weevil borer or corm weevil, is the second most destructive pest. Loss of more than 40% of the plant crop to banana weevil has been recorded.