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31 results for “Mythimna”
Figure 7 in Revision of the species of Mythimna Ochsenheimer, 1816 (Pseudaletia Franclemont, 1951) (Lepidoptera: Noctuidae: Noctuinae: Leucaniini) occurring in Brazil
Figure 7 Mythimna (Pseudaletia) unipuncta. a: male in dorsal view. b: male genitalia in posterior view with aedeagus in lateral view. Holotype of Pseudaletia roraimae at the AMNH 29780. There are no scales.
Figure 3 in Revision of the species of Mythimna Ochsenheimer, 1816 (Pseudaletia Franclemont, 1951) (Lepidoptera: Noctuidae: Noctuinae: Leucaniini) occurring in Brazil
Figure 3 Evolutionary relationships of the taxa, using the Neighbor-Joining method. The optimal tree with the sum of the branch lengths = 0,14304783 is shown, bootstrap values are presented next to each ramification.
Figure 9 in Revision of the species of Mythimna Ochsenheimer, 1816 (Pseudaletia Franclemont, 1951) (Lepidoptera: Noctuidae: Noctuinae: Leucaniini) occurring in Brazil
Figure 9 Mythimna (Pseudaletia) adultera. a, male genitalia in left lateral view; b, saccus in dorsal view; c: detail of the ampulla, digitus and clasper of the right valva in inner view; d, fultura inferior in dorsal view; e, aedeagus in left lateral view with everted vesica; f, female genitalia in left lateral view. Scale bars = 1mm.
Figure 12 in Revision of the species of Mythimna Ochsenheimer, 1816 (Pseudaletia Franclemont, 1951) (Lepidoptera: Noctuidae: Noctuinae: Leucaniini) occurring in Brazil
Figure 12 Mythimna (P.) celiae sp. nov. a-b, male (DZ 39.913) in dorsal and ventral views; c-d, female (DZ 39.911) in dorsal and ventral views. Specimen deposited at the DZUP. Scale bar = 1cm.
Figure 11 in Revision of the species of Mythimna Ochsenheimer, 1816 (Pseudaletia Franclemont, 1951) (Lepidoptera: Noctuidae: Noctuinae: Leucaniini) occurring in Brazil
Figure 11 Mythimna (P.) sequax. a, male genitalia in left lateral view; b, aedeagus in left lateral view with the vesica everted; c, saccus in dorsal view; d, detail of the ampulla, digitus and clasper of right valva in inner view; e, fultura inferior in dorsal view; f, female genitalia in left lateral view. Scale bars = 1mm.
Figure 1 in Revision of the species of Mythimna Ochsenheimer, 1816 (Pseudaletia Franclemont, 1951) (Lepidoptera: Noctuidae: Noctuinae: Leucaniini) occurring in Brazil
Figure 1 Nomenclature adopted for wing venation and genitalia, based on Mythimna (P.) celiae sp. nov. a, fore and hindwing, scale bar = 10mm; b, male genitalia in ventral view; c, ampulla, digitus, and clasper in inner lateral view of the valva, with a scheme on the right side; d, uncus in posterior view; e, uncus in lateral view; f, fultura inferior (=juxta); g, aedeagus with everted vesica in lateral view; h-i, female genitalia in lateral and ventral views, respectively. Scale bars b-e, g-i= 1mm, f = 0.5mm.
Figure 7. Southern Jordan, 12 in Redescription of Mythimna rufulosa Wiltshire with the first record of the species from Jordan (Lepidoptera: Noctuidae: Noctuinae)
Figure 7. Southern Jordan, 12 km NW from Aqaba, 70 m, 29°33.7937'N, 35°07.7499'E, the habitat of Mythimna rufulosa (photo by A. Saldaitis).
Figures 5–6 in Redescription of Mythimna rufulosa Wiltshire with the first record of the species from Jordan (Lepidoptera: Noctuidae: Noctuinae)
Figures 5–6. Mythimna rufulosa: male (5) and female (6) genitalia. The specimens dissected are deposited in WIGJ.
Figures 1–4 in Redescription of Mythimna rufulosa Wiltshire with the first record of the species from Jordan (Lepidoptera: Noctuidae: Noctuinae)
Figures 1–4. Mythimna rufulosa: adults. Depository of the specimens: 1 in CAV; 2 and 4 in WIGJ; 3 in ASV.
Figure 14 in On the distribution of Mythimna phlebitis (Püngeler) in Kazakhstan (Lepidoptera: Noctuidae: Noctuinae: Leucanini)
Figure 14. Habitat of Mythimna phlebitis: Southeast Kazakhstan, Almaty Region, Tuzkol' Lake, 6 km SE of Karasaz settl., 2100m, 43°00'N 79°57'E, 26.V.2016 (photo by P. Gorbunov).
Figure 11 in On the distribution of Mythimna phlebitis (Püngeler) in Kazakhstan (Lepidoptera: Noctuidae: Noctuinae: Leucanini)
Figure 11. Habitat of Mythimna phlebitis: East Kazakhstan, Zaisan District, 30 km NW of Maikapchagai, Bozaigyrkum Sands, 530 m, 47°41'N 85°20'E, 16.V.2017 (photo by P. Gorbunov).
Figures 6–9 in On the distribution of Mythimna phlebitis (Püngeler) in Kazakhstan (Lepidoptera: Noctuidae: Noctuinae: Leucanini)
Figures 6–9. Mythimna spp.: male (6, 7) and female (8, 9) genitalia, ventral view. The specimens dissected are deposited in CAV.
Figure 5 in On the distribution of Mythimna phlebitis (Püngeler) in Kazakhstan (Lepidoptera: Noctuidae: Noctuinae: Leucanini)
Figure 5. Mythimna phlebitis: adult in nature, Southeast Kazakhstan, Almaty Region, Tuzkol' Lake, 6 km SE of Karasaz settl., 2100m, 43°00'N 79°57'E, 26.V.2016 (photo by P. Gorbunov).
Figure 12 in On the distribution of Mythimna phlebitis (Püngeler) in Kazakhstan (Lepidoptera: Noctuidae: Noctuinae: Leucanini)
Figure 12. Habitat of Mythimna phlebitis: East Kazakhstan, Kurchum District, Kurchum Ridge, 12 km NE of Karatogai vill., 740 m. 48°28'04.95" N, 84°36'09.88" E 03.VI.2013 (photo by A. Volynkin).
Figure 13 in On the distribution of Mythimna phlebitis (Püngeler) in Kazakhstan (Lepidoptera: Noctuidae: Noctuinae: Leucanini)
Figure 13. Habitat of Mythimna phlebitis: East Kazakhstan, Kurchum distr., 26 km SE of Barak-Batyr vill., unnamed mountain massif, 610 m, 48º29'14''N, 84º07'02''E, 21.VI.2014 (photo by A. Volynkin).
Geographic variation of sex pheromone of oriental armyworm Mythimna separata associated with overwintering sites and migration
<p>In China, the sex pheromone component of the oriental armyworm has always been considered to be cis-11-hexadecenal (Z11-16:Ald), but inconsistent and confused results have been found in practical use in the field trapping throughout the country. We confirmed two types of sex pheromones in the oriental armyworm by extract and analysis of pheromone gland from single female moth. The EAG results show that there are two types of male moths collected in the field. One type has strong EAG response to Z11-16:Ald but weak to Z11-16:Ac and Z11-16:OH, and the other type has strong responses to Z11-16:Ac and Z11-16:OH but weak response to Z11-16:Ald. Therefore, two types of mixtures have been evaluated in several locations from South to North China in the last several years. One mixture is composed of key component Z11-16:Ald, and other isomers. cis 11-hexadecenol (Z11-16:OH) has been found to be an inhibitor, and hexadecanal has no synergistic effect. Another is a mixture of cis-11-hexadecenyl acetate (Z11-16:Ac) and Z11-16:OH. The most optimal ratio was found to be 8:2. It is mainly composed of Z11-16:Ac and Z11-16:OH in Guangdong. This blend was also found active in the coastal areas such as Zhejiang, Guangdong and Hainan in spring, but both blends are attractive in autumn. Basically one of the two or mixed are attractive in other locations, which depends on the locations. Therefore, it is inferred that the sex pheromone composition of the oriental armyworm is related to climatic and geographical locations, and there are differences in different years. Therefore, the monitoring of the oriental armyworm needs to be employed by two blends at the same time in China.</p>
Figures 1–4 in On the distribution of Mythimna phlebitis (Püngeler) in Kazakhstan (Lepidoptera: Noctuidae: Noctuinae: Leucanini)
Figures 1–4. Mythimna spp.: adults, dorsal view. The specimens are deposited in CAV.
Microsatellite-based analysis of genetic structure and gene flow of Mythimna separata (Walker) (Lepidoptera: Noctuidae) in China
<p>The oriental armyworm, <i>Mythimna separata</i>, is a serious agricultural pest in China. Seasonal and roundtrip migration has recently led to sudden, localized outbreaks and crop losses. To evaluate genetic differentiation between populations in eastern and western China and elucidate gene flow, the genetic structure of 20 natural populations from nine provinces was examined using seven microsatellite markers. The results indicated high genetic diversity. However, little to moderate (0 < <i>F</i><sub>ST</sub> < 0.15) genetic differentiation was detected, and there was no correlation between genetic distance and geographical distance. Bayesian clustering analysis identified three groups whereas discriminant analysis of principal components identified ten clusters that were considered as two clear‐cut clusters and one admixed group. Gene flow occurred frequently in most population pairs, and an asymmetrical migration rate was detected in several pairwise population comparisons. The bottleneck test showed that few populations had experienced recent bottlenecks. Correspondingly, large‐scale and long‐distance migration of <i>M. separata</i> has caused low genetic differentiation and frequent gene exchange. Our findings are important for studying genetic evolution and help to improve predictions of <i>M. separata</i> outbreaks in China.</p>
A cold high-pressure system over North China hinders the southward migration of Mythimna separata in autumn
<p></p> <p class="MsoNormal"><strong><span>Background:</span></strong><span> </span><a name="OLE_LINK27"></a><span>In warm regions or seasons of the year, the planetary boundary layer is occupied by a </span><a name="OLE_LINK5"></a><span><span>huge variety and quantity</span></span><span><span> of insects, but the southward migration of insects </span></span><span><span>(in East Asia) in autumn is still poorly understood</span></span><span><span>. </span></span></p> <p class="MsoNormal"><span><strong><span>Methods:</span></strong></span><span><span> </span></span><span><span>We collated daily catches of </span></span><span><span>the oriental armyworm (</span></span><span><em><span>Mythimna separata</span></em></span><span><span>)</span></span><span><span> moth from </span></span><span><span>20</span></span><span><span> </span></span><span><span>search</span></span><span><span>light traps </span></span><span><span>from</span></span><span><span> 2014</span></span><span><span> to </span></span><span><span>2017</span></span><span><span> in China</span></span><span><span>. In order to explore the </span></span><span><span>autumn migratory </span></span><span><span>connectivity of <em>M. separata</em> in East China, we analyzed the autumn climate and simulated the autumn migration process of </span></span><span><span>moth</span></span><span><span>s.</span></span></p> <p class="MsoNormal"><span><strong><span>Results: </span></strong></span><span><span>The results confirmed that northward moth migration in spring and summer under the East Asian monsoon system can bring rapid population growth. </span></span><span><span>However, slow southerly wind (blowing towards the north) prevailed over the major summer breeding area in North China (33°- 40°N) due to a cold high-pressure system located there, and this severely disrupts </span></span><span><span>the autumn 'return' migration of this pest. Less than 8% of moths from the summer breeding area successfully migrated back to their winter-breeding region, resulting in a sharp decline of the population abundance in autumn. As northerly winds (blowing towards the south) predominate at the eastern periphery of </span></span><span><span>a high-pressure system</span></span><span><span>, the westward movement of the high-pressure system </span></span><span><span>leads to </span></span><span><span>more northerlies over North China, increasing the numbers of moths migrating southward successfully. Therefore, an outbreak year of <em>M</em></span></span><span><em><span>.</span></em></span><span><em><span> separata</span></em></span><span><span> larvae was associated with a more westward position of the high-pressure system during the previous autumn. </span></span></p> <p class="MsoNormal"><span><strong><span>Conclusion:</span></strong></span><span><span> </span></span><span><span>These results indicate that the southward migration in autumn is crucial for sustaining pest populations of <em>M. separata</em>, and the position of the cold high-pressure system in September is a key environmental driver of the population size in the next year. </span></span><span>This study indicates that the autumn migration of insects in East China is more complex than previously recognized, and that the meteorological conditions in autumn</span><span> are an important driver of migratory insects' seasonal and interannual population dynamics.</span></p>
A cold high-pressure system over North China hinders the southward migration of Mythimna separata in autumn
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