scholarly journals Is leaf or sheath antibiosis involved in the resistance of maize composite EPS12 to Sesamia nonagrioides?

2005 ◽  
Vol 137 (3) ◽  
pp. 350-355 ◽  
Author(s):  
A. Butrón ◽  
B. Ordás ◽  
P. Revilla ◽  
G. Sandoya ◽  
A. Ordás ◽  
...  
Keyword(s):  
Selection Process ◽  
Insect Pest ◽  
Mediterranean Area ◽  
Stem Borer ◽  
Sesamia Nonagrioides ◽  
Mechanisms Of Resistance ◽  
Maize Population ◽  
Maize Varieties ◽  
Maize Leaves ◽  
Lepidoptera Noctuidae

AbstractThe pink stem borer (PSB) (Sesamia nonagrioides Lefèbvre, 1827; Lepidoptera: Noctuidae) is the main insect pest of maize (Zea mays L., Poaceae) in the Mediterranean area. Maize varieties partially resistant to PSB have been identified, but few studies have documented the mechanisms of resistance involved. The objectives of this research were to study the levels of leaf and sheath antibiosis of a maize population, EPS12, and determine whether antibiosis improved over the selection process for less stalk tunneling. A hybrid check and two Bacillus thuringiensis (Bt) hybrids were also examined. Several bioassays were carried out in a control chamber to evaluate antibiosis of maize leaves and sheaths against PSB larvae. Leaf antibiosis was significantly higher for EPS12 than for the hybrid check and sheath antibiosis was low for all non-Bt hybrids studied. We conclude that leaf and sheath antibiosis was not significantly improved during the selection process. Future efforts should look for other possible mechanisms of resistance, such as stem rind antibiosis.

scholarly journals Assessment of Sesamia nonagrioides (Lepidoptera: Noctuidae) EcR and USP Genes as Targets for Exogenous Non-Persistent RNAi

Diversity ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 677
Author(s):  
Dimitrios Kontogiannatos ◽  
Luc Swevers ◽  
Anna Kourti
Keyword(s):  
Pest Control ◽  
Developmental Stages ◽  
Insect Pest ◽  
Sesamia Nonagrioides ◽  
Corn Borer ◽  
Practical Applications ◽  
Genes Encoding ◽  
Lepidoptera Noctuidae ◽  
Case Basis ◽  
Dsrna Injection

RNA interference (RNAi) is a transforming technology with high potential for practical applications in biology, including specific and safe insect pest control. For developing RNAi-based pest-control products no general recommendations exist and the best strategy needs to be determined for each insect pest separately on a case-by-case basis. In this research, the potential of silencing the genes encoding the subunits of the ecdysone receptor complex, EcR and Ultraspiracle (USP) by RNAi was evaluated in the corn borer, Sesamia nonagrioides, using different delivery approaches and targeting different developmental stages. In conjunction with our previous research it is demonstrated that prepupae are sensitive to RNAi triggered by dsRNA injection and that feeding of dsRNA-expressing bacteria throughout S. nonagrioides’ larval life can lead to limited developmental malformations with no potent insecticidal results. Our results, consistent with previous studies, indicated a great fluctuation of exogenous RNAi effectiveness in the Lepidopteran species, suggesting that further factors should be taken into consideration in order to expand this very promising field into the ‘’RNAi-resistant’’ insect species.

scholarly journals Origin and taxonomic status of the Palearctic population of the stem borer Sesamia nonagrioides (Lefèbvre) (Lepidoptera: Noctuidae)

2011 ◽  
Vol 103 (4) ◽  
pp. 904-922 ◽  
Author(s):  
PASCAL MOYAL ◽  
PATRICE TOKRO ◽  
AHMET BAYRAM ◽  
MATILDA SAVOPOULOU-SOULTANI ◽  
ERIC CONTI ◽  
...  
Keyword(s):  
Taxonomic Status ◽  
Stem Borer ◽  
Sesamia Nonagrioides ◽  
Lepidoptera Noctuidae

scholarly journals Fitness Costs of Chlorantraniliprole Resistance Related to the SeNPF Overexpression in the Spodoptera exigua (Lepidoptera: Noctuidae)

2021 ◽  
Vol 22 (9) ◽  
pp. 5027
Author(s):  
Changwei Gong ◽  
Xinge Yao ◽  
Qunfang Yang ◽  
Xuegui Wang ◽  
Yuming Zhang ◽  
...  
Keyword(s):  
Insect Pest ◽  
Ryanodine Receptors ◽  
Oviposition Rate ◽  
Fitness Cost ◽  
Fitness Costs ◽  
Male Adult ◽  
Mating Response ◽  
Transmembrane Segments ◽  
High Level ◽  
Lepidoptera Noctuidae

Spodopteraexigua, a multifeeding insect pest, has developed a high level of resistance to chlorantraniliprole, which is a benzoylurea insecticide that targets the ryanodine receptors (RyRs). Herein, the resistant strain (SE-Sel) and sensitive strain (SE-Sus) were obtained by bidirectional screening for six generations. The potential oviposited eggs and oviposition rate of the SE-Sel strain were dramatically lower than those of the SE-Sus strain; on the contrary, the weights of prepupae and preadult were significantly increased. As a post-mating response, the higher number of non-oviposited eggs in the SE-Sel strain was caused by a lower mating rate. In addition, the expression levels of vitellogenin (SeVg) and its receptor (SeVgR) in the SE-Sel strain were consistently lower than those in the SE-Sus strain. An RyRI4743M mutation, contributing to the resistance to chlorantraniliprole, was located in the S3 transmembrane segments and might have affected the release of calcium ions; it led to the upregulated expression of the neuropeptide SeNPF and its receptor SeNPFR, and the mating and oviposition rate were significantly recovered when the SeNPF was knocked down though RNA interference (RNAi) in the male adult of the SE-Sel strain. Moreover, the expression of the juvenile hormone-binding proteins SeJHBWDS3 and SeJHBAN in the male adult of the SE-Sel strain was significantly decreased, which proved the existence of a fitness cost from another angle. Therefore, these results indicate that the fitness cost accompanied by chlorantraniliprole resistance in S. exigua may be related to the decrease in mating desire due to SeNPF overexpression.

First records of Chrysodeixis chalcites (Lepidoptera: Noctuidae: Plusiinae) for east-central Canada

2013 ◽  
Vol 145 (3) ◽  
pp. 338-342 ◽  
Author(s):  
Henry Murillo ◽  
David W.A. Hunt ◽  
Sherah L. VanLaerhoven
Keyword(s):  
Insect Pest ◽  
Green Bean ◽  
Nonnative Species ◽  
East Central ◽  
Central Canada ◽  
Chrysodeixis Chalcites ◽  
Lepidoptera Noctuidae

AbstractSpecimens of Chrysodeixis chalcites (Esper) (Lepidoptera: Noctuidae) have been found in different municipalities in southwestern Ontario, Canada since 2008. This nonnative species occurs in tomato and green bean crops where it has the potential of becoming an important insect pest.

Development of Immature Stages of Sesamia nonagrioides (Lepidoptera : Noctuidae) Under Alternating and Constant Temperatures

2003 ◽  
Vol 32 (6) ◽  
pp. 1337-1342 ◽  
Author(s):  
Argyro A. Fantinou ◽  
Dionyssios Ch. Perdikis ◽  
Costas S. Chatzoglou
Keyword(s):  
Sesamia Nonagrioides ◽  
Immature Stages ◽  
Lepidoptera Noctuidae

Insect Pests of Shorea robusta Gaertn. f. : An Update

2015 ◽  
Vol 38 (4) ◽  
pp. 313-322
Author(s):  
N. Roychoudhury
Keyword(s):  
Insect Pests ◽  
Stem Borer ◽  
North India ◽  
White Grubs ◽  
Insect Fauna ◽  
Living Tree ◽  
Shorea Robusta ◽  
Damage Seed ◽  
Indian Origin ◽  
Lepidoptera Noctuidae

Shorea robusta Gaertn. f. (Dipterocarpaceae), commonly known as sal, is one of the most important timbers of India both ecologically and economically. It is of Indian origin, widely distributed in central and north India and constitutes an important ecosystem, which provides cool and calm environment rich in biodiversity. This tree species has a highest number of insect fauna among the forest trees. Of about 346 insects recorded on sal, about 155 species of insects belonging to the order Lepidoptera (105), Coleoptera (31), Thysanoptera (9), Hemiptera (4), Orthoptera (4), Ephemeroptera (1) and Isoptera (1) are associated with living tree. The major insect pests of sal are, ‘seed and seedling borer’ Pammene theristis Meyrick (Lepidoptera: Eucosmidae), feeding on seed while they are on the tree; Sitophilus rugicollis Casey (Coleoptera : Curculionidae), damage seed either on the forest floor or during storage; white grubs such as Holotrichia spp. (Coleoptera : Scarabaeidae), which feed on the root system of the plants in nurseries and beetles feed on the foliage; defoliators such as Caviria sericea Moore (Lepidoptera : Lymantriidae), Lymantria mathura Moore (Lepidoptera : Lymantriidae), Paectes subapicalis Walker (Lepidoptera : Noctuidae), Trabala vishnou Lefebvre (Lepidoptera : Lasiocampidae), which feed on the leaves; stem borer such as Hoplocerambyx spinicornis Newman (Coleoptera : Cerambycidae) and sap sucker, such as Drosicha stebbingi Green (Hemiptera : Coccidae). Termites, such as Coptotermes curvignathus Holmgren (Isoptera : Rhinotermitidae) and timber borers, such as Sinoxylon anale and S. crassum (Coleoptera : Bostrychidae), damage sal timber in dying, felled or stored logs in depots.

scholarly journals Phylogeography of Sesamia nonagrioides (Lepidoptera: Noctuidae) in Iran inferred from mitochondrial DNA

2015 ◽  
Vol 61 (4) ◽  
pp. 341-359 ◽  
Author(s):  
Mehdi Esfandiari ◽  
Neda Mehravar ◽  
Hossein Motamedi ◽  
Hamid Rajabi Memari ◽  
Hossein Rajaei
Keyword(s):  
Mitochondrial Dna ◽  
Sesamia Nonagrioides ◽  
Lepidoptera Noctuidae
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