Occurrence and Intra-Specific Variation of Sweetpotato Weevil (Brentidae: Coleoptera) in Relation to Its Potential Spread in Southern United States of America and the Caribbean

Jackai, L. E. N.; Sosinski, Bryon; Jackson, D. Michael; Sorensen, K. A.; Bonsi, C.K.; Addo‐Bediako, Abraham; Ali, Regina; Tameru, B.; Quarcoo, David; Alvarez, Marikis N.

doi:10.17660/actahortic.2006.703.24

Cited by 4 publications

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“…In the US quarantine measures are so strict that even the presence of weevils has a major economic impact as an entire crop could be rejected. As a result of this some farmers have abandoned sweetpotato production entirely (Jackai et al, 2006).…”

Section: Sweetpotato Weevilsmentioning

confidence: 99%

Invertebrate pests and diseases of sweetpotato (Ipomoea batatas): a review and identification of research priorities for smallholder production

Johnson

Gurr

2016

Ann Appl Biol

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Sweetpotato has been the subject of little research worldwide compared with other major crop staples, and this is especially so for less developed countries where sweetpotato is critical for food security. This review synthesises information on plant protection issues that affect smallholder sweetpotato farmers in less developed countries to identify major issues and suggest research priorities. Though the pests and diseases of sweetpotato in less developed countries are largely common to industrialised systems, their relative importance differs and losses tend to be more severe as a result of differing agronomic practices and relative unavailability of management options and technical support that are important in developed countries. Smallholders are heavily reliant on cultural practices such as traditional forms of biological control using ants and livestock, fallowing and composting (sometimes with plant materials having biocidal properties). Crop protection methods that have been developed for use in sweetpotato production in developed countries, such as pathogen-tested planting material, early maturing varieties, pheromone trapping and pesticides are less accessible to, and relevant for, smallholders. Smallholders also typically harvest a given crop progressively which extends the period over which storage roots are potentially vulnerable to attack but reduces the risk of post-harvest losses. Human population growth in developing countries is leading to an increase in cropping intensity with shorter fallow periods and more years of continuous crops. This has the dual effect of depleting soil nutrients and increasing the potential for pest and pathogen build-up. Associated with this, the adoption of strategies to manage crop nutrition, such as not burning crop residues, promote carryover of pests and pathogen inocula. As a consequence of these factors, sweetpotato yield losses from diseases, especially viruses, and pests, particularly weevils, can be high. Climate change is likely to result in more frequent drought and this will increase losses caused by sweetpotato weevils that are favoured by dry conditions. This review of sweetpotato pests and their management options concludes with suggestions for some future research priorities including the combination of traditional practices that have pest management outcomes with relevant practices from industrial production that are able to be transferred or modified for use in smallholder production. Increased technical support for decision making and diagnostics, including molecular approaches that have scope for field use, will be important in reducing the burden imposed by biotic threats to this important global crop.

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Section: Sweetpotato Weevilsmentioning

confidence: 99%

Invertebrate pests and diseases of sweetpotato (Ipomoea batatas): a review and identification of research priorities for smallholder production

Johnson

Gurr

2016

Ann Appl Biol

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“…Salah satu hama utama ubi jalar adalah penggerek umbi yang disebabkan oleh Cylas formicarius (Jackai et al, 2006;Reddy et al, 2012b). Kerugian hasil yang disebabkan oleh hama ini mencapai 100%.…”

Section: Pendahuluanunclassified

Perbandingan Metode Aplikasi Jamur Entomopatogen Beauveria Bassiana Untuk Pengendalian Cylas Formicarius (Coleoptera: Curculionidae)

Prayogo¹

2017

JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA

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Comparing application methods of entomopathogenic fungus Beauveria bassiana to control Cylas formicarius (Coleoptera: Curculionidae). Cylas formicarius is a major pest of sweet potatoes. The tuber damage caused by C. formicarius reaches 100%. The research objective was to compare application methods of entomopathogenic fungi Beauveria bassiana to control C. formicarius. The research was conducted at the entomology screen house of Indonesian Legume and Tuber Crops Research Institute (ILETRI) at Malang, East Java, from January to September 2013. The treatment consisted of 12 application methods, each was repeated three times. The results showed that application of B. bassiana into the planting pit, soaking the sweet potato cuttings into the conidial suspension of B. bassiana for 30 minutes before planting, followed by spray application with two week interval (2 to 12 weeks after planting, WAP) or P4 was effective in suppressing C. formicarius population and tuber damage. Tuber weight obtained from P4 treatment was 1.4 kg plant -1 , while from the chemical insecticide was only 1.1 kg plant -1 . Tuber damage from P4 treatment was lower ( 5%) than that from chemical insecticide treatment (42%). Therefore, application of B. bassiana conidial suspension in the planting pit, continued by soaking the sweet potato cuttinginto the B. bassiana conidial suspension for 30 minutes before planting, and followed by spray applications of B. bassiana conidial suspension at two-week intervals ( 2-12 WAP) or P4 method can be recommended to control C. formicarius.Key words: adult, egg, larvae, tuber damage, tuber weight ABSTRAKPerbandingan metode aplikasi jamur entomopatogen Beauveria bassiana untuk pengendalian Cylas formicarius (Coleoptera:Ccurculionidae). Cylas formicarius merupakan hama utama ubi jalar. Kerusakan yang disebabkan C. formicarius mencapai 100%. Penelitian ini bertujuan untuk membandingkan metode aplikasi jamur entomopatogen, Beauveria bassiana dalam mengendalikan C. formicarius. Penelitian dilakukan di rumah kasa entomologi, Balai Penelitian Tanaman Aneka Kacang dan Umbi (BALITKABI), Malang pada bulan Januari sampai dengan September 2013. Perlakuan terdiri atas 12 metode aplikasi, masing-masing perlakuan diulang tiga kali. Hasil penelitian menunjukkan bahwa aplikasi konidia B. bassiana ke dalam lubang tanam, perendaman stek ke dalam suspensi konidia jamur B. bassiana selama 30 menit sebelum tanam, dilanjutkan aplikasi semprot dengan interval dua minggu mulai umur 2 sampai dengan 12 minggu setelah tanam (MST) (P4) efektif menekan populasi C. formicarius dan kerusakan umbi. Berat umbi perlakuan P4 mencapai 1,4 kg tanaman -1 , sedangkan perlakuan aplikasi insektisida kimia hanya 1,1 kg tanaman -1 . Kerusakan umbi perlakuan P4 hanya 5%, sedangkan kerusakan umbi pada aplikasi insektisida kimia mencapai 42%. Efikasi perlakuan P4 dapat dilihat dari populasi telur, larva maupun imago pada waktu panen lebih sedikit dibandingkan dengan perlakuan lainnya. Oleh karena itu, aplikasi suspensi konidia B. bassiana pada luba...

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“…), sweet potato virus disease, low market value tubers harvested by farmers, lack of certified planting materials resistant to abiotic and biotic elements and modern storage facilities for long-term conservation. Jackai et al [9] reported that there are losses of millions of dollars annually only due to infestation of sweet potato by weevils and these insect pests are more prevalent in the tropical regions. Based on this decline in sweet potato production and taking into account its high potentiality, it could be important to intensify research efforts to increase its production for the benefit of the producers and consumers and sort out the problem of food insecurity.…”

Section: Introductionmentioning

confidence: 99%

Assessment of production and marketing constraints and value chain of sweet potato in the municipalities of Dangbo and Bonou

et al. 2018

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Background: Sweet potato [Ipomoea batatas (L.) Lam.] plays an important role in ensuring food security and incomes for local communities. It is particularly grown in southern region of Benin, and its production over the last few years has declined due to disease and severe pest infestation. Therefore, it was imperative to carry out this study to identify the main constraints related to the recent decline in sweet production and more specifically analyzing the production and marketing constraints of sweet potato in the townships of Dangbo and Bonou. Results: The results of the survey revealed that many varieties of sweet potato were grown, mainly "Vobodouaho" (local name in Goun language), the most preferred variety by producers. Weedicides and insecticides were used to control weeds and insect pests, respectively. There was no efficient control methods against black rot, Alternaria blight, cylas spp., and caterpillar among the pathogens and insects that damaged sweet potato production in the study areas. The main constraints reducing sweet potato production in the townships of Dangbo and Bonou are: lack of adequate methods for controlling pest and diseases, lack of financial resources due to no access to credit, absence of modern equipment, scarcity and high cost of labor and absence of best methods for long-term storage. The average yield of sweet production per hectare ranged from 6.5 to 15.1 tons fresh matter/ha. The market value of sweet potato is still low at farmers' level when compared to that of other stakeholders along the value chain. Conclusion: This study calls for the attention of public and private sectors and policy makers for more investment in sweet potato research. Avenues for further research on sweet potato have also been suggested.

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Occurrence and Intra-Specific Variation of Sweetpotato Weevil (Brentidae: Coleoptera) in Relation to Its Potential Spread in Southern United States of America and the Caribbean

Cited by 4 publications

References 0 publications

Invertebrate pests and diseases of sweetpotato (Ipomoea batatas): a review and identification of research priorities for smallholder production

Invertebrate pests and diseases of sweetpotato (Ipomoea batatas): a review and identification of research priorities for smallholder production

Perbandingan Metode Aplikasi Jamur Entomopatogen Beauveria Bassiana Untuk Pengendalian Cylas Formicarius (Coleoptera: Curculionidae)

Assessment of production and marketing constraints and value chain of sweet potato in the municipalities of Dangbo and Bonou

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