[111] conducted an experiment to evaluate the toxicity of Cry proteins to Cylas puncticollis and Cylas brunneus. Avoid planting sweet potatoes in the same area 2 years in a row, and plant well away from infested crops. Similarly, in the system of PNG, where there was a cultivation of taro on hills of ants [, EPN has advantageous relations with sweet potato within the roots for the prevention of weevils [. Android Edition For instance, in sub-Saharan agriculture, the application of transgenic Bacillus thuringiensis sweet potato is considered as an attractive alternative to lowering the mobility of conventional breeding for the resistance of host-plant and other pest management selection in which few thought about it to be more costly for growers to practice [94,95]. of Agriculture); no. Apparent symptoms of weevils infestation will be yellowing of the vines but this usually only occur after heavy infestation [26]. Sign up for our periodic e-mail newsletter, and get news about our collections, new partnerships, information on research, trivia, awards, and more. crediting UNT Libraries Government Documents Department. It is produced largely in Asia (accounting for up to 76.1% of world production in 2013), followed by the African continent (19.5%) [1]. It can be available in the form of a spray, or in some instances, it is one of the main components of a sex pheromone trap. 24 Jansson et al. Sweet potato is an important food crop that is grown widely in tropical and subtropical regions. The weevil infestation may also be affected by planting method, cultivar planted as well as the level of sanitation. We are committed to sharing findings related to COVID-19 as quickly as possible. The 4 sweet potato weevils infest sweet potato equally in the field and at storage, causing extensive losses of up to 60% to 100% [30]. In Southern Florida, up to 80% (average 69%) of losses in sweet potato yields have been reported, mainly contributed by the death of infested plants [20]. It is frequently used for the sterilization of weevil in tubers meant for long storage or export purposes [81, 82] and for the release of irradiated weevils into environment for eradication programmes [83]. Monden et al. University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; The trap is usually designed with synthetic pheromone lure such as (Z)-3-dodecen-1-ol (E)-2-butenoate together with ethyl acetate and is usually placed at ground level to facilitate the entrance of adult weevils, which will then be killed by the insecticide inside the trap. The pheromone (Z)-3-dodecen-1-ol (E)-2-butenoate has shown to be more effective mating for the prevention of Cylas formicarius [80,81], mainly for trapping both sexes of weevils. Adult sweetpotato weevil, Cylas formicarius. Sweet Potato Weevil’s Habitat. Photo 8. Inspect the crop regularly, at least once a week: check the base of the vines, looking for damage and holes. If you need expert professional advice, contact your local extension office. Sweetpotato (Ipomoea batatas), and many types of morning glory. Mason and Jansson [90] conducted an experiment to compare the toxicity of five insecticides: parathion, carbamate methomyl, chlorpyrifos, chlorinated hydrocarbon endosulfan, and carbamate carbaryl, against adult Cylas formicarius using Petri dish bioassays in laboratory. Department of Agriculture. The sweet potato weevil is considered to be the most serious pest of sweet potato, with losses ranging from 5% to 97%. at higher altitude (1992–2438 meters above sea level) (23%) [37]. The momentum in biotechnology research field has given the sweet potato industry a promising future. CHEMICAL CONTROLThese recommendations are for commercial growers; those selling their produce in markets where signs of weevil damage would affect acceptability and price.

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