A new species of the genus Caenorhinus Thomson, 1859 (Coleoptera, Rhynchitidae) from North Vietnam

A new species, Caenorhinus (Flavodeporaus) nahangensis Legalov, sp. nov. from North Vietnam is described and illustrated. This new species is similar to Caenorhinus (Flavodeporaus) lobanovi Legalov, 2021 Laos but differs from it in the different body coloration, narrower rostrum, very weakly curved mesotibiae, densely punctate elytral interstriae, obtuse apex of the aedeagus, and the form of the basal sclerite. From C. nigrobasalis Legalov, 2003, it is distinguish in the narrower rostrum, finely punctate forehead, greenish elytra, red ventrites 4 and 5, pygidium and propygidium, obtuse apex of the aedeagus, and the form of the basal sclerite.

Chemical composition and antimicrobial activity of essential oils extracted from Amomum muricarpum Elmer from North Vietnam

Recent years have seen the development of bacterial resistance to currently available antibiotics, which necessitates a search for new antimicrobial agents. Amomum muricarpum Elmer is a widely used medicinal plant species in the genus Amomum (family Zingiberaceae) that is commonly found in Laos, the Philippines, China, and Vietnam. The present article describes the chemical composition and antimicrobial activity of essential oils extracted from the leaves and rhizomes of A. muricarpum from North Vietnam. The hydrodistilled essential oil was analyzed using gas chromatography and gas chromatography-mass spectrometry, with the broth microdilution method designed to evaluate its antimicrobial efficacy. The absolute yield of essential oils amounted to 0.11% and 0.13% (v/w) for leaves and rhizomes, respectively, on a dry weight basis. It was found that the leaves and rhizomes of A. muricarpum produce oils abounding in monoterpenes. Of the total identified volatile components in the leaf oil (97.18%), three main constituents include α-pinene (40.45%), linalool (12.34%), and β-pinene (10.31%). In the rhizome oil, the main constituents include α-pinene (48.10%), β-pinene (20.32%), and linalool (7.56%) of the total identified volatile components (98.08%). An antimicrobial activity test indicates that essential oils from the leaves and rhizome of A. muricarpum inhibit the growth of Staphylococcus aureus ATCC 25923, with a minimum inhibitory concentration (MIC) of 200 µg/ml. In addition, the rhizome essential oil also exhibits antimicrobial activity against Bacillus cereus ATCC 14579, with a MIC value of 200 µg/ml. The results indicate the potential of essential oils extracted from A. muricarpum as a source of antimicrobial agents.

The Tricontinental Revolution

The Tricontinental Revolution provides a major reassessment of the global rise and impact of Tricontinentalism, the militant strand of Third World solidarity that defined the 1960s and 1970s as decades of rebellion. Cold War interventions highlighted the limits of decolonization, prompting a generation of global South radicals to adopt expansive visions of self-determination. Long associated with Cuba, this anti-imperial worldview stretched far beyond the Caribbean to unite international revolutions around programs of socialism, armed revolt, economic sovereignty, and confrontational diplomacy. Linking independent nations with non-state movements from North Vietnam through South Africa to New York City, Tricontinentalism encouraged marginalized groups to mount radical challenges to the United States and the inequitable Euro-centric international system. Through eleven expert essays, this volume recenters global political debates on the priorities and ideologies of the Global South, providing a new framework, chronology, and tentative vocabulary for understanding the evolution of anti-imperial and decolonial politics.

Khanh Thien gold-ore-magmatic cluster (North Vietnam)

New data on the gold mineralization related of the Late Paleozoic alkaline complexes of North Vietnam are presented. Two types of gold mineralization associated with syenites and granosyenites have been identified: gold only and gold-polymetallic. Geochemical characteristics are given for both types and the first data on the sulfur isotopic composition of ore minerals.

First Report of Lasiodiplodia pseudotheobromae Causing Collar Rot of Peanut in Shandong Province, China

In August 2019, a collar rot of peanut was observed in several fields in Qingdao, Shandong province, China. Disease survey was conducted in several peanut fields. Less than 5% plants exhibited various symptoms, including brown or black stem rot, pod rot, leaf chlorotic, wilted, and even dead. Symptomatic stems were cut into small pieces, surface disinfested with 70% ethanol for 1 min, 1% NaClO for 2 minutes, rinsed three times with sterile water, and dried on sterile filter papers. Pieces then were plated on potato dextrose agar (PDA) media and incubated at 25°C in darkness. Fungal cultures were initially white, then turned gray, and eventually turned black, and aerial hyphae were dense, fluffy. Conidia were ellipsoidal, initially hyaline, unicellular, 14.3 to 21.1 × 8.7 to 13.2 µm (n = 50), and mature conidia showed dark brown, with a central septum, and longitudinal stripes. Molecular identification was performed by sequencing ITS with ITS1/ITS4 (White et al., 1990) and beta tubulin gene with Bt2a/Bt2b (Glass and Donaldson, 1995) of a representative isolate ZHX9. ITS and beta tubulin regions (OK427342 and OK489788) of ZHX9 obtained 99.62 and 100% similar to L. pseudotheobromae (KF766193 and EU673111), respectively. Phylogenetic analysis was done using Neighbor-Joining (NJ) analysis based on those gene sequences. The microorganism we have isolated was identified as L. pseudotheobromae based on molecular analysis and morphological characteristics. For pathogenicity assay, twelve ten-days-old peanut (Zhonghua No.12) seedlings were each inoculated with one mycelial plug (8 mm in diameter) by placing the inoculum on the base of the stem. Twelve plants were each inoculated with a plug of non-colonized PDA as controls. Plants were incubated in a growth chamber (30°C in the day and 25°C at night, a 12-h photoperiod and 80% RH). Necrotic lesions were observed on stems of all inoculated seedlings 5 days after inoculation, whereas control plants remained asymptomatic, and L. peudotheobromae was consistently re-isolated from symptomatic stem. In Asia, peanut collar rot caused by L. teudotheobromae has been reported in India, Indonesia, North Vietnam (Nguyen, et al., 2006) and China (Guo, et al., 2014), but collar rot caused by L. pseudotheobromae has not been reported. To our knowledge, this is the first report of L. peudotheobromae causing collar rot on peanut in China. These results will provide crucial information for studying on epidemiology and management of this disease.

Outstanding Project of Russian Vietnamese Studies

The review focuses on the seventh volume of the Complete Annals of Daiviet (Đại Việt sử k ton thư), published in 2020. This central monument of Vietnamese traditional historical thought has not been translated into European languages. Volume seven presents a translation of chapters XVIXVII, covering the period of Vietnamese history from 1533 to 1599. The book consists of several parts: a study on Vietnam China relations and political history of North Vietnam in the 16th century, the translation itself, and a detailed commentary. The Appendices section contains translations of Chinese and Vietnamese works. The translation from hanviet was done by the leading Russian expert on Vietnamese history A.L. Fedorin, Doctor of Historical Sciences, who also wrote the research part and comments. The publication of the seventh volume of the Complete Annals of Daiviet can be attributed to the outstanding achievements of the Russian scholar.

ACTIONS OF THE US AND SOUTH VIETNAM SPECIAL DIVISIONS ON THE "HO CHI MINA TRAIL" IN 1961-1967. BASED ON THE MEMOIRS OF AMERICAN WAR PARTICIPANTS

The article devoted to the analysis of the actions of special forces of US and South Vietnam during 1961–1967. One of the main tasks of these units during Vietnam war – destruction main objects of «Ho Chi Minh Trail» in South Vietnam, Laos and Cambodia. The work is built with the assistance of a memoir – translations memories combatants in South Vietnam and Laos, soldiers and commanders of Army of US, South Vietnam and Democratic Republic of Vietnam (DRV). The materials housed in the monographs of American and Vietnam researchers of the Indochina conflict, 1960–1970-s.In the early 1960s, in the setting of active infiltration teams of PAVN from DRV administration of USA adopted decision to send to Indochina units of special forces (Green Berets). Many of the military personnel who served in Vietnam belonged to 5th and 7th Special Forces Groups. Some Green Berets were assigned to the U.S. Military Assistance Command’s Studies and Observation Group (SOG) for making top secret intelligence operations and helped train the South Vietnamese special forces (LLDB). The most Green Berets defended South Vietnam’s border from infiltration from DRV. Apart from Green Berets, special units of the US NAVY were also active in South Vietnam. The main task of the special forces of the NAVY was the blockade of all waterways supplying partisans from North Vietnam and Cambodia by means of ambushes, sabotage, laying of mines and raids on bases of PAVN. In 1965-1967s mixed teams of Green Berets and LLDB conducted long-range reconnaissance missions into Laos and directed air strikes against the «Ho Chi Minh Trail». The U.S. aircraft bombed the «Ho Chi Minh Trail» daily, targeting areas based on electronic detection devices and intelligence gained by covert teams that infiltrated the area. However, these efforts could not slow down the movement of troops of PAVN, supplies southward along the «Ho Chi Minh Trail». The author paid attention to the creation units of special forces as part of army units of US Army situated in South Vietnam during 1965–1967. Special attention is paid by the author to the analysis secret operations of Green Berets against «Ho Chi Minh Trail». The author concluded that the special forces of USA and South Vietnam failed to achieve the set goals.

Tortrilema, a new subgenus of the genus Manulea Wallengren with description of a new species from Vietnam (Lepidoptera: Erebidae: Arctiinae: Lithosiini)

A new subgenus of the genus Manulea Wallengren, 1863, Tortrilema subgen. n. is described and briefly reviewed. A new species, M. nubes sp. n. is described from North Vietnam. A new synonymy is established: Manulea (Nyea) Agenjo, 1983 = Manulea (Agenjoa) Dubatolov & Zolotuhin, 2011, syn. nov.

Dolgoma infernalis, a new species from North Vietnam (Lepidoptera: Erebidae: Arctiinae: Lithosiini: Lithosiina)

A new species of the genus Dolgoma Moore, 1878, D. infernalis sp. n. is described from North Vietnam (Lào Cai Province, Fansipan Mt.). The new species is similar to D. nigrocribrata Dubatolov, Kishida & Wang, 2012 described from Nanling Mts in Guangdong Province of China. Adults and male genitalia of both species are illustrated.