Pdf adult female and male sweetpotato weevils, cylas formicarius. The sweetpotato weevil spw, cylas formicarius fabricius, is one of the most destructive pests of the sweetpotato. We assessed the risk associated with introduction of sweet potato weevil, cylas formicarius elegantulus summers coleoptera. The sweet potato weevil, cylas formicarius fabricius is recongnized as the most important pest of sweet potato, ipomoea batata l. It is native to indonesia where it if found on the wild plants of the genus ipomea zimmerman, 1994. The weevil can be managed by integrated pest management ipm strategy, which includes host plant. Notes on taxonomy and nomenclature top of page the subspecies cylas formicarius elegantulus was created for the new world weevil to separate it from the cylas formicarius formicarius of the old world. Kehilangan hasil akibat serangan hama ini berkisar antara 1080%, bergantung pada lokasi, jenis.
Improved practical synthesis of the sex pheromone of female sweet potato weevil, cylas formicarius int. Improved practical synthesis of the sex pheromone of female. Sweet potato is an important food crop that is grown widely in tropical and subtropical regions. Publication date 1992 topics nematodes as biological pest control agents, cylas formicarius. Brentidae, is the most serious pest of sweetpotato around the world, damaging sweetpotatoes in the field and in storage, as well as being a quarantine pest. Key words cylas formicarius elegantulus summers, coleoptera, cur culionidae, sex pheromone, sweetpotato weevil, markreleaserecapture. Trapping sweetpotato weevil, cylas formicarius coleoptera.
If this is not possible and you can see that your cuttings are carrying weevil eggs and larvae, you can soak them in an insecticide. The incidence of sweet potato weevil cylas formicarius fabricius coleoptera. Reliable information about the coronavirus covid19 is available from the world health organization current situation, international travel. Bioassay test against cylas formicarius larvae, pupae and adult of c. Resistance in sweet potatoes to the sweetpotato fkrmicarius, cylas formicarius elegantulus summers. Diurnal periodicity of deathfeigning in cylas formicarius coleoptera. Studies were conducted to examine the characteristics of infestation of vines of sweet potato plants by the sweet potato weevil, cylas formicarius f. Overall, this research gave new potential sources of chitin that can be applied in improving the virulence of b.
Shared binding sites for the bacillus thuringiensis proteins. Transcriptome and gene expression analysis of cylas. Probably the most famous one was written by french inquisitor bernard gui around salem witch trials this complex system of using ants as metaphors for various aspects of christian belief and practice is only really addressed in the first few lines of each chapter, after which. Pdf management of sweet potato weevil cylas formicarius. The larva creates winding tunnels packed with fecal material as it feeds and grows. Pdf behavioral repertory of adult cylas formicarius. However, there is limited knowledge on the molecular mechanisms underlying growth and differentiation of c. Numerous and frequentlyupdated resource results are available from this search. Johannes niders formicarius was a demonological treatise written during the council of basel in switzerland.
Organic mulches reduce crop attack by sweetpotato weevil. Development and characterization of microsatellites from. The sweetpotato weevil, cylas formicarius, stores free sperm in both the testes and the seminal vesicle, even though the primary function of the testes is sperm production. Few areas in the above regions where sweet potato is grown are free from its destruction. The use of terminal tender vine cuttings, taken even from heavily weevil. Three experiments were carried out at two locations hobu and unitech to evaluate the effect of inorganic fertiliser inputs. Cylas formicarius approximately 10x larger than actual size weevil eggs, larvae and pupae can be carried in vine cuttings. Pdf biology of sweet potato weevil, cylas formicarius f. Factsheet cylas formicarius fabricius sweet potato weevil.
However, females needed a longer starvation period than males to show the decreased proportion of deathfeigning. In addition, the highest mortality percentage of c. Laboratory and field efficacy of entomopathogenic fungi for the management of the sweetpotato weevil, cylas formicarius coleoptera. Because the larval period is spent within vines or tubers, and the adults are nocturnal, chemical control frequently is not effective. Therefore, the use of weevilfree sweet potato cuttings is often advised. The weevil is managed by a package of practices together called integrated pest management ipm. Cylas formicarius, the sweet potato weevil, is a species of sweet potato weevil in the beetle family brentidae. An effective integrated pest management ipm method will help to prevent economic losses, and it is crucial to understand the factors that contribute to weevil.
Cylas brunneus showed a background characteristic as cylas formicarius 31. Curculionidae, and intensity of damage done to sweet potato ipomoea batatasl in kerala were assessed in an elaborate survey aaopting a purposive and stratified random sampling technique. This page was last edited on 3 september 2017, at 06. Effects of starvation on deathfeigning behavior, or thanatosis, were observed in adults of the sweetpotato weevil, cylas formicarius f. The virulence improvement of beauveria bassiana in infecting. Sweetpotato weevil, cylas formicarius fabricius insecta. Our study quantifies the effectiveness of risk mitigation procedures of sweet potatoes before shipment in. Instead of the utilization of unrecyclable hmpa or dmpu, sodium amide in liquid ammonia 11 or ethylene diamine 10. Entomopathogenic, beauveria bassiana, cylas formicarius, ipomea batatas, chitin.
Genetic variation of sweet potato weevils, cylas formicarius. Recorded average yields in this crop are too low 6,5 tha and it is largely attributable to several reasons involving soil quality, lack of irrigation facilities and damage caused by sweetpotato weevil, cylas formicarius f. Laboratory and field efficacy of entomopathogenic fungi. Keefektifan cendawan metarhizium brunneum petch terhadap. Brentidae, from infested areas to noninfested areas via shipment of sweet potato, ipomoea batatas l.
With free trade between the united states and the u. Jun 19, 2019 sweetpotato weevil spw, cylas formicarius elegantulus summers, is the most damaging rootfeeding insect of sweetpotato, ipomoea batatas l. Brentidae 2 factor affecting larval development rate, with larval development not including the prepupal period occurring in about 10 and 35 days at 30c and 24c, respectively. Eradication of sweet potato weevil, cylas formicarius. Top of page the subspecies cylas formicarius elegantulus was created for the new world weevil to separate it from the cylas formicarius formicarius of the old world. Weevil infestation ranges from 20 to 50% on many farms and can even reach to 100% depending on the season and variety. Management of sweet potato weevil, cylas formicarius a world. Curculionidae is one of the major pest on sweetpotato which can cause yield lost up to 100%. Cylas puncticollis boheman and cylas brunneus fabricius occur in east africa, whereas cylas formicarius summers is found in both tropical and subtropical areas worldwide 2, 3.
In taiwan, it damages on average about 18% of tubers. Effects of starvation on deathfeigning in adults of cylas. Cylas formicarius distribution in terengganu in this study, it was observed that all damaged sweet potatoes collected from cultivation areas and markets were highly infested by c. The objective of this study was to obtain the effective and efficiency control technique of sweetpotato weevils.
Sweet potato weevils it is best to take vine tip cuttings from fields with few weevils. Nineteen of 27 microsatellite loci tested were usable for population analyses. Selection of suitable entomopathogenic nematodes for biological control of sweetpotato weevil, cylas formicarius coleoptera. A significantly lower proportion of deathfeigned adults was observed in starved weevils compared with unstarved controls in both sexes.
Because of the cryptic nature of the larvae and nocturnal activity of the adults, and the cancellation of longresidual. The origin of cylas formicarius is not definitely known, but it is thought it may have originated in africa or india. Life cycle adults are antlike, shiny, blueblack, snout beetles whose waist and legs are bright orangered. Ipomoea batatas, cylas formicarius, detection, monitoring, mass trapping sweetpotato, ipomoea batatas l. Pdf behavioral repertory of adult cylas formicarius fabricius. It is inherently of interest to entomologists due to its strikingly colorful appearance and extremely long rostrum beak. Formicarius nider pdf johannes nider was a german theologian and member of the dominican order. Insecticides with adequate water solubility are presumably transported through the vine and kill the weevils in that plant part. Larvae are legless, white to cream colored with a pale brown head. The sweetpotato weevils in hawaii their biology and control core. Larval feeding on storage roots reduces yield and induces terpene production, rendering roots inedible. Among the nations of the world, the united states is the 12th great. Cylas is a genus of sweet potato weevils in the beetle family brentidae. The research was conducted on juneoctober 2014 at muneng research station, probolinggo, east java, using randomized block design, five treatments.
Sweet potato weevil is the most disastrous pest affecting sweet potato plantations, causing millions of dollars losses annually. Recently the sex pheromone of spw has been isolated, identified, and synthesized. Cylas formicarius is a major pest of sweetpotato in papua new guinea. Pdf adult female and male sweetpotato weevils, cylas formicarius fabricius, have repertories of at least 19 and 21 behavior patterns, respectively find, read and cite all the research. Our study quantifies the effectiveness of risk mitigation procedures of sweet potatoes before shipment in relation to. The sweetpotato weevil, cylas formicarius fabricius coleoptera. Pdf sweet potato weevil cylas formicarius incidence in. Cylas formicarius wikipedia for example, in taiwan, less damage by c. Sweet potato ipomoea batatas journal of entomology and zoology. A series of experiments were conducted in the instructional.
Brentidae introduction distribution life cycle and description host plants natural enemies damage management selected references introduction back to top. Cylas formicarius is considered the single most important pest of sweetpotato. Pengendalian hama penggerek ubi jalar cylas formicarius. Laboratory and field efficacy of entomopathogenic fungi for. Antennal transcriptome and expression analyses of olfactory. Characteristics of infestation of sweet potato by sweet. Management of sweet potato weevil, cylas formicarius a. Cylas formicarius wikispecies wikispecies, free species. The weevil is a serious pest of sweet potato in numerous caribbean countries. To conduct population genetics analyses on sweetpotato weevils cylas formicarius elegantulus collected from three populations in the united states, microsatellite loci were developed from sweetpotato weevil transcriptome sequences obtained from a publicly available database. Oclcs webjunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus. Host preference of sweetpotato weevil, cylas formicarius. Johannes nider, formicarius 1435 1438 introductory note.
Introduction the sweetpotato weevil, cylas formicarius fabricius spw, is one of the most serious pests of the sweetpotato, ipomoea batatas l. Brentidae, is an important pest of sweet potato worldwide. Sweet potato weevil control was formkcarius in a field planted away from a weevilinfested field, whereas the tubers were heavily infested when the fields were adjacent to each other. Sweetpotato weevil is the most serious pest of sweet potato, not only in the united states, but around the world. Since then, the integrated pest management ipm program has extended its application and, nowadays, it has become the main control method for this pest, the damage has been reduced and yields have. Sweet potato is the main staple crop in png and this paper presents a study from the humid lowlands of the morobe province. Jun 27, 2019 cylas formicarius, the scientific name of sweet potato weevil, is the most common pest that affects sweet potato. Lamarck, is one of the top ten staple crops produced worldwide, trailing only corn, rice, wheat, potatoes, cassava, and barley fao 2014. A trap for monitoring the sweetpotato weevil coleoptera. Vines can be free from weevil infestation by dipping into a solution of insecticides 46. Entomopathogenic nematode on sweet potato weevil journal of. The sweetpotato weevil, cylas formicarius fabricius, feeds and breeds on ipomoea spp.
The sweetpotato weevils in hawaii their biology and control by martin sherman and minoru tamashiro introduction the sweetpotato, ipomoea batatas poir. Chronic effects and horizontal transmission of metarhizium. Mortality was observed 48 hrs after first contact between nematodes and insects. Introduction mechanisms and rates of dispersal for cylas formicarius elegantuius sum mers, the sweetpotato weevil spw, have been mostly speculative. In 1993, inivit and cip established a collaborative research program to develop an integrated management on sweetpotato weevil, cylas formicarius. After studying at the universities of vienna and cologne, he attended the council of constance in 141518 and was prior of the dominican convent at nuremberg in 1426729. Their infestation normally causes 20 to 50% of damage in most commercial plantations.
Cylas latreille is a paleotropical genus of about 25 known species that form a distinctive group within the superfamily of weevils coleoptera. Topics taxonomy, new species, costa rica, formicarius, birds collection citebank language english. Apr 01, 2007 we assessed the risk associated with introduction of sweet potato weevil, cylas formicarius elegantulus summers coleoptera. Sweetpotato weevil, cylas formicarius edis university of florida. Mar 21, 2020 cylas formicarius sweet potato weevil temperature is the principal factor affecting larval development rate, with larval development not including the prepupal period occurring in about 10 and 35 days at 30 o and 24 o c, respectively. Selection of suitable entomopathogenic nematodes for. Jul 11, 2012 the sweetpotato weevil, cylas formicarius fabricius coleoptera. Olfactionbased approaches, such as use of synthetic sex pheromones to monitor populations and the baitand. Cylas formicarius has rapidly expanded its distribution area towards southwestern islands of kagoshima prefecture since it was found in okinawa islands. Storage roots produced under drought or normal conditions were tested for adult feeding, oviposition, larval survival and pupal weight in the laboratory under nochoice and free choice test conditions. Stathers t, namanda s, mwanga ro, khisa g, kapinga r. Dialogus ad vitam christianam exemplo conditionum formice johannes nider full view. Ted control of sweet pot a to weevil cylas formcarllis fa. Files are available under licenses specified on their description page.
In the 1900s, the spw invaded okinawa and spread to the northern islands of amami 1940 and tokara 1950 setokuchi 1990. Brentidae, is one of the most important pests of sweet potatoes in the world. Here, it was investigated sperm storage in the testes in relation to mating frequency. The its1 lengths of 36 weevils tested in this study ranged from 557 to 587 bp, and were conspicuously longer in weevils from india. Cylas formicarius, the sweet potato weevil, is a species of sweet potato weevil in the beetle. The weevils were found on yoron island, a southernmost part of southwestern islands, in 1915, then on. The sweetpotato weevils in hawaii their biology and control. Sep 11, 2017 the sweetpotato weevil, cylas formicarius fabricius, is a serious pest of sweetpotato. His work formicarius, published around, is an important. Dec, 2019 cylas formicarius wikipedia for example, in taiwan, less damage by c.
In this study, the chronic effects of infection with metarhizium anisopliae strain qs155 in adult c. It causes damage in the field, in storage, and is of quarantine significance. Even small populations of sweet potato weevils can produce crop losses of up to 60 to 100% during the dry season 1. Seven field trapping experiments were conducted from february 20 to november 2015 as part of an effort to develop a simple, easy to construct, cost.
Filter paper was put in the bottom of petri dish, and moistened by suspension of 250 ijs nematodes. Brentidae article pdf available in journal of insect behavior 144. In severely infested fields, as many of 88% of tubers can be damaged. All structured data from the file and property namespaces is available under the creative commons cc0 license. Assessment of risk of introduction of cylas formicarius. But numerous sex pheromone studies indicate that these two groups are the same species and not two subspecies ns talekar, avrdc, taiwan, personal communication, 1996.
Influence of sweetpotato weevil infestation on the yields of twelve sweet potato lines. Top of page the subspecies cylas formicarius elegantulus was created for the new. Because of the cryptic nature of the larvae and nocturnal activity of. Sperm supply from the testes to the seminal vesicle over. Female fecundity was significantly reduced in treatments where females were infected directly and maintained in pairs with either infected or. Selection of sweetpotato cultivars with resistance to insect pests has been carried out for over a century but no high yielding.
1064 979 14 1155 87 666 426 147 1136 385 1362 305 11 1350 1391 341 1425 1097 419 337 49 79 249 1034 1584 1091 1556 1387 423 180 837 466 1455 525 269 827 627 196 889 1399 748 132 516 1169 216 639