Biological characterization and mating compatibility of Helicoverpa gelotopoeon (D.) (Lepidoptera: Noctuidae) populations from different regions in Argentina

2017 ◽  
Vol 108 (1) ◽  
pp. 108-115 ◽  
Author(s):  
M.I. Herrero ◽  
S.V. Fogliata ◽  
A. Vera ◽  
A. Casmuz ◽  
D. Sosa Gómez ◽  
...  
Keyword(s):  
Genetically Modified Crops ◽  
South American ◽  
Reproductive Parameters ◽  
Biological Characterization ◽  
Present Evidence ◽  
Migratory Capacity ◽  
Mating Compatibility ◽  
American Bollworm ◽  
Lepidoptera Noctuidae ◽  
Two Populations

AbstractHelicoverpa gelotopoeon, the South American bollworm, is a polyphagous pest of the Heliothinae complex that causes damage to soybean, cotton, and chickpea crops. Some species within this complex have developed resistance to genetically modified crops and insecticides, which has led to increased interest in their genetic diversity and population structure. The objective of this study was to characterize biological and reproductive parameters of two populations of H. gelotopoeon collected in two different provinces of Argentina. Intra- and inter-population crosses revealed that H. gelotopoeon populations from both regions of Argentina did not present evidence of pre-zygotic and post-zygotic incompatibility, suggesting that Tucumán and Córdoba populations of H. gelotopoeon belong to a single wide-ranging species. Our data support the occurrence of substantial gene flow between H. gelotopoeon populations, probably due to the widely documented, long-range migratory capacity of Heliothinae species.

scholarly journals First results of Central Asiatic Euchalcia DNA-studies: comparison of nucleotide sequence differences in COI between Euchalcia herrichi and Euchalcia gyulai (Lepidoptera: Noctuidae)

2020 ◽  
Vol 6 ◽  
pp. 1-4
Author(s):  
Stanislav K Korb
Keyword(s):  
Nucleotide Sequence ◽  
Cytochrome C ◽  
Dna Barcoding ◽  
Cytochrome C Oxidase ◽  
Coi Gene ◽  
First Results ◽  
The Difference ◽  
Coi Sequences ◽  
Lepidoptera Noctuidae ◽  
Two Populations

We submitted first results of the DNA studies of the Central Asiatic owlet moths of the genus Euchalcia. Standard cytochrome C oxidase subunit I (COI) gene fragments were sequenced for DNA barcoding of six specimens belonging to Euchalcia herrichi and Euchalcia gyulai. We compared the received sequences between discussed species and with two European Euchalcia species (E. variabilis and E. consona). We found no variability within the COI sequences of the samples collected in the same locality (Alai Mts., Kyrgyzstan), whereas the difference in COI sequences between two populations (Ketmen Mts., Kazakhstan and Alai Mts., Kyrgyzstan) was 0.005.

Global Potential Distribution of the South American Cutworm Pest Agrotis robusta (Lepidoptera: Noctuidae)

2021 ◽  
Author(s):  
Germán San Blas ◽  
Gisella Obholz ◽  
Fernando Maia Silva Dias ◽  
Alexandre Specht ◽  
Mirna Martins Casagrande ◽  
...  
Keyword(s):  
Potential Distribution ◽  
South American ◽  
The South ◽  
Lepidoptera Noctuidae

scholarly journals Differences between two populations of bollworm, Helicoverpa zea (Lepidoptera: Noctuidae), with variable measurements of laboratory susceptibilities to Bt toxins exposed to non-Bt and Bt cottons in large field cages

PLoS ONE ◽  
2019 ◽  
Vol 14 (3) ◽  
pp. e0212567 ◽  
Author(s):  
Nathan S. Little ◽  
Blake H. Elkins ◽  
R. Michelle Mullen ◽  
Omaththage P. Perera ◽  
Katherine A. Parys ◽  
...  
Keyword(s):  
Helicoverpa Zea ◽  
Large Field ◽  
Bt Toxins ◽  
Lepidoptera Noctuidae ◽  
Two Populations

scholarly journals Comparison of two artificial diets to rear Elaphria agrotina

2018 ◽  
Vol 48 (5) ◽  
Author(s):  
Pollyanna Nunes de Otanásio ◽  
Ludgero Cardoso Galli Vieira ◽  
Vânia Ferreira Roque-Specht ◽  
Silvana Vieira de Paula-Moraes ◽  
Priscila Maria Colombo da Luz ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Development Time ◽  
Reproductive Parameters ◽  
Artificial Diets ◽  
Brazilian Savannah ◽  
Lepidoptera Noctuidae

ABSTRACT: Given the increasing importance of Elaphria agrotina (Guenée) (Lepidoptera: Noctuidae) in corn crops, especially in the Brazilian Savannah biome, the present research aimed to study its development and survival on Greene’s and Poitout & Bues’s artificial diets (25±1°C, 70±10% relative humidity [RH] and 12h photophase). Poitout & Bues’s diet was more suitable than Greene’s diet, providing higher survival percent (77.51% vs. 5.57%), lower development time (49.81 days vs. 55.24 days) and higher fecundity (167.65 vs. 84.9 eggs), respectively. All the caterpillars reared on Poitout & Bues’s diet passed through six instars, while almost half of the larvae reared on Greene’s diet went through one less instar stage. Regarding the main reproductive parameters, higher average time of generation (T) and lower values of net rates of reproduction (Ro), and increased (rm) intrinsic and finite reason of increase (λ), were observed for larvae reared on Greene’s diet. Results presented in this study indicated that Poitout & Bues’s diet is more suitable for maintenance of colonies of E. agrotina as compared to Greene’s diet.

scholarly journals Reproductive potential of Spodoptera eridania (Stoll) (Lepidoptera: Noctuidae) in the laboratory: effect of multiple couples and the size

2016 ◽  
Vol 76 (2) ◽  
pp. 526-530 ◽  
Author(s):  
A. Specht ◽  
D. G. Montezano ◽  
D. R. Sosa-Gómez ◽  
S. V. Paula-Moraes ◽  
V. F. Roque-Specht ◽  
...  
Keyword(s):  
Reproductive Potential ◽  
Reproductive Parameters ◽  
Spodoptera Eridania ◽  
Adult Females ◽  
Controlled Conditions ◽  
Pupal Size ◽  
Lepidoptera Noctuidae

Abstract This study aimed to evaluate the effect of keeping three couples in the same cage, and the size of adults emerged from small, medium-sized and large pupae (278.67 mg; 333.20 mg and 381.58 mg, respectively), on the reproductive potential of S. eridania (Stoll, 1782) adults, under controlled conditions (25 ± 1 °C, 70% RH and 14 hour photophase). We evaluated the survival, number of copulations, fecundity and fertility of the adult females. The survival of females from these different pupal sizes did not differ statistically, but the survival of males from large pupae was statistically shorter than from small pupae. Fecundity differed significantly and correlated positively with size. The number of effective copulations (espematophores) and fertility did not vary significantly with pupal size. Our results emphasize the importance of indicating the number of copulations and the size of the insects when reproductive parameters are compared.

scholarly journals Detection of Defoliation Injury in Peanut with Hyperspectral Proximal Remote Sensing

2020 ◽  
Vol 12 (22) ◽  
pp. 3828
Author(s):  
José Pinto ◽  
Scott Powell ◽  
Robert Peterson ◽  
David Rosalen ◽  
Odair Fernandes
Keyword(s):  
Remote Sensing ◽  
Block Design ◽  
South American ◽  
Gas Exchange Parameters ◽  
Leaf Reflectance ◽  
Economic Thresholds ◽  
Pest Detection ◽  
Use Efficiency ◽  
Natural Infestation ◽  
Lepidoptera Noctuidae

Remote sensing can be applied to optimize efficiency in pest detection, as an insect sampling tool. This efficiency can result in more precise recommendations for decision making in pest management. Pest detection with remote sensing is often feasible because plant biotic stress caused by herbivory triggers a defensive physiological response in plants, which generally results in changes to leaf reflectance. Therefore, the key objective of this study was to use hyperspectral proximal remote sensing and gas exchange parameters to characterize peanut leaf responses to herbivory by Stegasta bosqueella (Lepidoptera: Gelechiidae) and Spodoptera cosmioides (Lepidoptera: Noctuidae), two major pests in South American peanut (Arachis hypogaea) production. The experiment was conducted in a randomized complete block design with a 2 × 3 factorial scheme (two lepidopterous species and 3 categories of injury). The injury treatments were: (1) natural infestation by third instars of S. bosqueella, (2) natural infestation by third instars of S. cosmioides, and (3) simulation of injury with scissors to mimic larval injury. We verified that peanut leaf reflectance is different between herbivory by the two larval species, but similar among real and simulated defoliation. Similarly, we observed differences in photosynthetic rate, stomatal conductance, transpiration, and photosynthetic water use efficiency only between species but not between real and simulated larval defoliation. Our results provide information that is essential for the development of sampling and economic thresholds of S. bosqueella and S. cosmioides on the peanut.

scholarly journals Chromosomal polymorphism in Drosophila subobscura populations from Barcelona (Spain)

1964 ◽  
Vol 5 (1) ◽  
pp. 27-38 ◽  
Author(s):  
Antonio Prevosti
Keyword(s):  
Chromosomal Polymorphism ◽  
Drosophila Subobscura ◽  
Marginal Populations ◽  
Seasonal Differences ◽  
Present Evidence ◽  
Two Populations

1. Chromosomal polymorphism in two populations of D. subobscura from Barcelona has been analysed and compared with the polymorphism which has been reported from other populations.2. In spite of microclimatic differences between the Barcelona sites, there is no evidence of differences in the frequency of inversion types nor of seasonal differences within one of these sites.3. Regularities in the array of frequencies of chromosomal types in Barcelona and other populations suggest that the polymorphism is mainly adaptive although there is also evidence of differences due to distance which are not obviously associated with differences in habitat.4. In general the index of free recombination gives higher values in the marginal populations of D. subobscura, but further data are needed to arrive at a definite conclusion on this point since the present evidence is rather ambiguous.

Biological Characterization of a Nucleopolyhedrovirus of Spodoptera litura (Lepidoptera: Noctuidae) Isolated from the Philippines

2001 ◽  
Vol 20 (1) ◽  
pp. 39-47 ◽  
Author(s):  
Barbara A Laviña ◽  
Leodegario E Padua ◽  
Fu Quan Wu ◽  
Noriko Shirata ◽  
Motoko Ikeda ◽  
...  
Keyword(s):  
Spodoptera Litura ◽  
The Philippines ◽  
Biological Characterization ◽  
Lepidoptera Noctuidae
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