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Piper zeylanicum Miq. (Piperaceae) an endemic species of Sri Lanka is reported and described and illustrated as a new record for India from Nilgiri District of Tamil Nadu.
The little known reduviine species, Tiarodes elegatis Stål, 1863, is redescribed based on the material from Sri Lanka. The characters of male genitalia are reported for the first time. The dorsal habitus, head, male genitalia and other diagnostic morphological features are illustrated.
New genus Palpotreta is proposed within the subfamily Ototretinae and one new species P. ramicornis sp. nov. from Sri Lanka is proposed as new to science. Illustrations of diagnostic characters are given.
Dambullaeus piae gen. n. and sp. n. (Acari: Prostigmata: Erythraeidae) is described from Sri Lanka.
Atrichopogon horni KIEFFER, 1925 from Sri Lanka is redescribed, illustrated and placed in the subgenus Atrichopogon s. str. Palpomyia schmidti GOETGHEBUER, 1934 from Iraq is redescribed and recognized as a new senior synonym of Palpomyia miki GOETGHEBUER, 1934.
Falcaustra desilvai sp. nov. (Ascaridida, Kathlaniidae) from the large intestine of Cnemaspis aff. tropidogaster (Squamata, Gekkonidae) is described and illustrated. Falcaustra desilvai represents the 4th nematode species from Sri Lanka to be assigned to the genus and is distinguished from other Sri Lankan species by the distribution pattern of caudal papillae (12 precloacal, 2 adcloacal, 10 postcloacal, and 1 median), length of spicules (956–1046 μm) and absence of a pseudosucker.
A survey in four distant locations: Anuradhapura, Madampe, Sri Jayewardenapura and Uda Walawe of Sri Lanka to identify the whitefly species related to cassava revealed two species, namely Bemisia tabaci (Gennadius) and Alerodicus dispersus (Russell). The species B. tabaci was recorded in all four surveyed locations, while A. dispersus was collected only from the first three locations. The results of the study on the pest life cycle under the laboratory conditions showed that, B. tabaci and A. dispersus passed through four nymphal instars before the adult stage. The mean duration values of these stages were 7.2, 7.5, 4.7, 5.6 and 8.5, 6, 9, 9 days respectively for the two species. The total duration of the life cycle of B. tabaci ranged from 22-57 days at the temperature of 29±2°C with a mean of 37.5 while that of A. dispersus was 27-68 days with a mean of 48 respectively (at 28±2°C). The damage to crop plants caused by two whitefly species is discussed with a special emphasis on their ability to transmit viral diseases.
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The island of Sri Lanka is free from serious natural hazards such as volcanic activity and earthquakes resulting from climatic extremes, but there are impacts of many natural disasters, such as landslides, floods and droughts, the intensity and frequency of which are increasing due to human interventions. Some areas of Sri Lanka are also periodically subject to cyclones that occur due to climatic conditions and geographical locations. Land degradation denotes all natural or anthropogenic processes that diminish or impair productivity of land. This occurs mainly through soil erosion, loss of organic matter and nutrients in the soil; salinization and large scale land degradation in Sri Lanka. Its manifestations today are heavy loss of soil, siltation in the water bodies, reservoirs and coastal waters, unplanned settlements, loss of arable land leading to declining productivity in agricultural lands and intensification of impacts of natural hazards such as flooding and landslides. Land degradation is a major problem in Eastern Coastal Area from Kalmunai MC, Karaitivu and Nintavur Divisional Secretariat Divisions (DSDs) of Ampara District. However, there is a considerable spatial heterogeneity exists within this area in terms of land use, topography, land management and socio-economic conditions. Therefore, land degradation assessment studies are very important for the sustainable development of the area. Considering the above background, this study was conducted with the objectives of developing a land degradation assessment model using a GIS based approach.
The larval stages of two new species of mites and a new genus in the Neothrombiidae are described from a beetle (Silphidae): Neosilphitrombium annabellae sp. n. from Sri Lanka and India and Vagatotrombium lissae gen. n. and sp. n. from India.
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This report presents the beautiful and cultural places in Sri Lanka attracting tourists. Democratic Socialist Republic of Sri Lanka is an island nationin South Asia, located in the Indian Oceanenrich with beautiful white sandy beaches, lush green landscapes varying from rainforests to peakwilderness sanctuaries, Buddhist monasteriesand accented by a cultural history dating back thousands of years.Sri Lankahas been a popular place of attraction for foreign travelers asearly as the 410’s AD/CE, the Chinese traveler Fa-Hienin the twelfth century and the Italian explorer Marco Poloclaiming“best island of its size in the world”. Tourism in the island nationis thethird largest foreign exchange earner. The airport and seaports have been closed to tourists for several months due to the pandemic. Discussions are underway to reopen the airport to tourism under a phased programme in January 2021
Improved soil fertility is a requirement for enhanced crop production. Combination of inorganic and organic fertilizers improve crop productivity while reduce environmental degradation. An experiment was carried out at Eastern University, Sri Lanka to study the effect of Foliar Application of Banana Pseudostem Sap on Yield of Cowpea (Vigna unguiculata L. Walp.) in sandy regosol. The experiment was laid out in Randomized Complete Block Design having five treatments viz; recommended inorganic fertilizer N, P, K as basal and N as topdressing (T1), N, P, 1⁄2 K as basal with recommended N as topdressing and foliar spray of 1% , 3%, 5% and 7% banana pseudostem sap solution (T2-T5) at 3rd, 5th, 7th and 9th week after planting. The results revealed that significant difference (P<0.05) were noted on number of pods per plant at 1st and 2nd picking. Higher number of pods per plant, maximum pod length and girth were in T2 while low in T1. Sun dried weights of pods and number of seeds per pod were significantly (P<0.05) varied at each picking. Further, cowpea yield at each picking were higher in T2 compared to tested treatments. The present study suggested that, among the tested treatments N, P, 1⁄2 K as basal with recommended N as topdressing and foliar spray of 1% Pseudostem sap solution at 3rd, 5th, 7th and 9th WAP would be the most suitable for cowpea production in sandy regosol.
Hekarella talawakelae, a new genus and species of rhigonematid from the Carnoyidae is described from the gut of a diplopod from Sri Lanka. The new genus is characterised by the presence of four, well developed, sublateral longitudinal rows of spines in the cervical region of the female, the presence of six cuticularised pieces around the oral opening, the monogonant female genital system, no cephalic cap in the male, anisomorphic and anisometric spicules, boat-shaped gubernaculum with a dorsal hole and 15 copulatory papillae with three pairs either sublateral, subdorsal. Hekarella gen. nov. has some morphological affinities with Martadamsonius, an African carnoyid and also with the Indian genus Raonema, but is easily differentiated by the presence of only one genital tract and by the form of the markedly anisomorphic and anisometric spicules.
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