The potential for using entomopathogenic nematodes and fungi in the management of the maize weevil, Sitophilus zeamais (Motschulsky) (Coleoptera: Curculionidae)

Mbata, George N.; Ivey, Cleveland; Shapiro‐Ilan, David I.

doi:10.1016/j.biocontrol.2018.06.008

Cited by 22 publications

(17 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Pest management in some storage pests could be very challenging with immature stages of insect pests that develop internally in grains and are therefore more tolerant to pesticides [ 5 , 6 ]. Generally, management of the maize weevil involves the use of synthetic pesticides, botanicals as well as entomopathogenic agents [ 6 , 7 ]. In Cameroon, in addition to wrong usage of chemical pesticides, the tools for pest management are mainly botanicals.…”

Section: Introductionmentioning

confidence: 99%

“…Essential oils have been shown to be very complex and diversified in phytochemical composition [ 8 , 9 ]. The variability in chemical composition of essential oils is the basis for their activity [ 7 , 9 ]. GC-MS analysis usually shows that essential oils are mainly composed of different monoterpene classes (oxygenated or hydrogenated mono-, di-, tri- or even sesqui-terpenes [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

“…GC-MS analysis usually shows that essential oils are mainly composed of different monoterpene classes (oxygenated or hydrogenated mono-, di-, tri- or even sesqui-terpenes [ 10 , 11 ]. This diversity of monoterpene compounds has given essential oils the ability to possess a wide range of pesticidal activity against different postharvest pests and microbes [ 7 , 12 , 13 , 14 , 15 ]. Monoterpenoids for instance have been demonstrated to have varying degrees bioactivity against different storage pests [ 6 , 7 , 14 , 15 , 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

“…This diversity of monoterpene compounds has given essential oils the ability to possess a wide range of pesticidal activity against different postharvest pests and microbes [ 7 , 12 , 13 , 14 , 15 ]. Monoterpenoids for instance have been demonstrated to have varying degrees bioactivity against different storage pests [ 6 , 7 , 14 , 15 , 16 , 17 , 18 ]. There is overwhelming presence of hydrogenated monoterpenes in essential oils of Cupressus sempervirens and Chenopodium ambrosioides [ 8 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Evaluation of the Insecticidal Activities of α-Pinene and 3-Carene on Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae)

Langsi

Nukenine

Oumarou

et al. 2020

Insects

Self Cite

View full text Add to dashboard Cite

Pest management in most sub-Saharan subsistence agriculture involves mainly the use of botanicals that are either applied as powders, solvent extracts, ash or essential oils. Two hydrogenated monoterpenes (α-pinene and 3-carene) from Cupressus sempervirens were tested against Sitophilus zeamais in the laboratory to evaluate the contact and fumigation effects on the mortality of adult and immature weevils, progeny production, and grain damage. Contact toxicity of the terpenes was investigated at these concentrations: 0.08, 4, 8 and 12 ppm (terpene/maize), while fumigant action was studied at the following doses: 1, 2, 3, and 4 ppm. The results indicate that insecticidal effects were concentration-dependent since mortality increased with dosage and exposure periods. After a 14-day exposure period at the concentration of 12 ppm of α-pinene and 3-carene/grain, more than 98% mortality of the mature weevils was observed at concentrations of 4.1333 and 1.642 ppm respectively and progeny production was reduced by 98% and 100%, respectively. When α-pinene and 3-carene were applied as fumigants, LC50s (lethal concentrations that generate 50% mortality) of 1.402 and 0.610 ppm were obtained after 24 h of exposure, respectively. At concentrations above 3 ppm, both monoterpenes acted as repellents to weevils and reduced grain damage by 80%. Both monoterpenes inhibited the development of immature stages of the weevil and reduced progeny by up to 94%. These compounds are very promising and effective and could be exploited as novel phytoinsecticides against the maize weevil.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of the Insecticidal Activities of α-Pinene and 3-Carene on Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae)

Langsi

Nukenine

Oumarou

et al. 2020

Insects

Self Cite

View full text Add to dashboard Cite

show abstract

“…Medidas para atenuar os prejuízos causados por essas pragas devem ser tomadas desde o campo, o controle com químicos sintéticos é o mais difundido, mas apresenta pontos negativos como o seu alto custo e a presença de resíduos nos alimentos e no ambiente, sendo um risco tanto para a saúde humana quanto para o agroecossistema, porém é fundamental práticas como a colheita no estádio de desenvolvimento correto, a limpeza, secagem e seleção dos grãos sadios a fim de evitar infestações oriundas do campo, além disso, outras estratégias podem ser tomadas, os recipientes e/ou embalagens utilizadas para armazenar devem ser uma aliada na hora de guardar tais produtos, sacos hermeticamente fechados com umidade de 18% são capazes de reduzir a população de S. zeamais durante 180 dias pelo aumento da concentração de dióxido de carbono na embalagem, levando os gorgulhos à morte, mas em contrapartida favorecem o aparecimento de fungos que produzem micotoxinas, o uso de variedades resistentes ao ataque de pragas e doenças que possuem características físicas como a dureza e densidade ou químicas como conteúdo de proteína bruta e teor de amilose podem tornar os grãos mais resistentes ao ataque e estabelecimento de fungos e diminuir o consumo dos insetos e consequentemente diminuir a velocidade de infestação, o controle biológico com espécies como Heterorhabditis bacteriophora, Steinernema carpocapsae e S. feltiae mostra-se promissor ao reduzir algumas populações de insetos-praga, mas ainda está longe da realidade do agricultor (LIKHAYO et al, 2018;MBATA;IVEY;SHAPIRO-ILAN, 2018;SENAR, 2018;NGOM et al, 2020).…”

unclassified

Alternativas Sustentáveis Para O Manejo De Fungos E Insetos De Armazenamento Em Grãos De Milho Para a Agricultura Familiar

Oliveira¹,

Oliveira²

2020

Ciência, Tecnologia E Inovação: Do Campo À Mesa

View full text Add to dashboard Cite

Resumo O milho é um grão de grande valor econômico e social para a agricultura familiar por sua diversidade de usos, podendo ser empregado na alimentação humana e animal. O armazenamento é uma estratégia adotada pelos produtores para garantir sua disponibilidade ao longo das épocas de escassez. Promover a sanidade desse material muitas vezes é um fator limitante devido as condições precárias de armazenamento, o surgimento de fungos e insetos que danificam a massa de grãos diminui a qualidade do produto. A partir disso, buscou-se através de uma revisão de literatura estratégias que visem o controle de fungos e insetos de armazenamento baseados em produtos de origem vegetal e de fácil disponibilidade para o agricultor. Há um grande potencial no uso de extratos, óleos e pós de origem vegetal para o combate de fungos e insetos de armazenamento, visto que muitos dos materiais podem ser encontrados na propriedade rural ou serem adquiridos por um baixo custo, sendo viável para o uso em condições de armazenamento e atuando de diversas formas sobre os problemas fitossanitários. Ainda são necessárias ações de assistência técnica e extensão rural para divulgar essas práticas, além de pesquisas a respeito do potencial de espécies vegetais locais.

show abstract

Low‐pressure ozone injection system: relationship between reaction kinetics and physical properties of grains

et al. 2022

View full text Add to dashboard Cite

BACKGROUND The ozonation of grains in a closed system at low pressure is a strategy with the potential for treating packaged products. Research is necessary to characterize the reaction kinetics of ozone in this type of injection system so that it is possible to design chambers and determine the ozone concentrations suitable for commercial‐scale applications. The objective of this study was therefore to characterize the low‐pressure ozone injection system in relation to the physical properties of the grains and determine possible changes in their quality. Samples (5 kg each) of common beans, cowpea beans, corn, popcorn kernels, paddy rice, and polished rice were exposed to ozone in a 70 L hypobaric chamber. Initially, the internal pressure of the chamber was reduced to 500 hPa. Then, ozone was injected at a concentration of 32.10 g m−3 at a volumetric flow rate of 1 L min−1 until reaching a pressure of 1000 hPa. To relate the decomposition of ozone to the grains that were being evaluated, different physical properties were determined, and quality analysis was conducted. RESULTS Ozone gas half‐life outside and inside the package depended on the grain type. Ozone decomposition was quickest in polished rice and slowest in common beans. The half‐life of the different grains ranged from 17.8 to 52.9 and 16.4 to 52.9 min, outside and inside the package, respectively. Considering the physical properties, specific surface (Ss), surface area (SA), and sphericity (φ) exhibited a significant correlation with the decomposition rate constant (k) of ozone. However, the variables volume (V), permeability (K), porosity (ε), and specific mass (ρ) showed no correlation with k. CONCLUSION The physical properties of grain influenced the reaction kinetics of ozone gas during the low‐pressure injection process. Ozone gas injection at low pressures did not alter the quality attributes of the grains under study. © 2022 Society of Chemical Industry.

show abstract

The potential for using entomopathogenic nematodes and fungi in the management of the maize weevil, Sitophilus zeamais (Motschulsky) (Coleoptera: Curculionidae)

Cited by 22 publications

References 16 publications

Evaluation of the Insecticidal Activities of α-Pinene and 3-Carene on Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae)

Evaluation of the Insecticidal Activities of α-Pinene and 3-Carene on Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae)

Alternativas Sustentáveis Para O Manejo De Fungos E Insetos De Armazenamento Em Grãos De Milho Para a Agricultura Familiar

Low‐pressure ozone injection system: relationship between reaction kinetics and physical properties of grains

Contact Info

Product

Resources

About