Seasonal fluctuation and the management tactics of guava whitefly, Aleurodicus dispersus

Species identification, host range, and identification key of whiteflies of Bogor and surrounding area. Whitefly (Hemiptera: Aleyrodidae) is a group of insects that are small, white, soft-bodied, and easily found on various agricultural crops. Whitefly is a phytophagous insect; some species are important pests in agricultural crops that can cause direct damage and can become vectors of viral diseases. The last few years the damage caused by whitefly in Indonesia has increased. Unfortunately, information about their species and host plants in Indonesia, including in Bogor, is still limited. Kalshoven, in his book entitled Pest of Crops in Indonesia, published in the 1980s reported that there were 9 species of whitefly in Indonesia. The information on the book should be reconfirmed. Therefore, this study was conducted to determine whitefly species and its host plants in Bogor and its surroundings. Whiteflies is identified based on the ‘puparia’ (the last instar of the nymph) collected from various agricultural plants, ornamental plants, weeds, and forest plants. A total of 35 species of whiteflies were collected from 74 species and 29 families of plants. The collwcted whiteflies consist of four species belong to Subfamily Aleurodicinae and 31 species of Subfamily Aleyrodinae. The most often found whitefly species were Aleurodicus dispersus, A. dugesii, and Bemisia tabaci. A dichotomous identification key of whiteflies was completed based on morphological character of 35 collected species. The number of whitefly species in Bogor and surrounding areas were far exceeded the number of species reported previously by Kalshoven from all regions in Indonesia.

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Seasonal Fluctuation in Abundance and Species Composition of Fish Collected by a Beam Trawl in Coastal Waters off Samcheonpo

Korean Journal of Ichthyology ◽

10.35399/isk.32.3.6 ◽

2020 ◽

Vol 32 (3) ◽

pp. 160-165

Author(s):

Tae-Sik Yu ◽

Seong-Hoon Lee ◽

Sa-Jo Kim ◽

Jin-Goo Kwon ◽

Kyeong Ho Han

Keyword(s):

Species Composition ◽

Coastal Waters ◽

Seasonal Fluctuation ◽

Beam Trawl

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Current Issues of Empirical Therapy of Severe Bacterial Community-Acquired Pneumonia During the Season of Respiratory Viral Infections

Antibiotics and Chemotherapy ◽

10.37489/0235-2990-2020-65-9-10-64-70 ◽

2020 ◽

Vol 65 (9-10) ◽

pp. 64-70

Author(s):

V. B. Beloborodov ◽

I. A. Kovalev ◽

G. V. Sapronov

Keyword(s):

Antimicrobial Therapy ◽

Influenza A ◽

Bacterial Infections ◽

Randomized Clinical Trials ◽

Respiratory Infections ◽

Molecular Genetic ◽

Seasonal Fluctuation ◽

Empirical Therapy ◽

Community Acquired Pneumonia ◽

Adverse Event Rate

Progredient growth of morbidity and mortality of patients with community-acquired pneumonia (CAP) requires optimization of treatment including antibacterial therapy. Implementation of molecular-genetic methods of diagnostics of viral and viral-bacterial infections in clinical practice has significantly augmented the conception of etiology of community-acquired pneumonia. Seasonal fluctuation of CAP prevalence corresponds with growth of morbidity of acute respiratory infections and influenza which contribute to the etiological structure of CAP by increasing the risk of infection caused by staphylococci. The synergy between influenza A virus and S.aureus has been shown; it is associated with an increase of virus replication in the presence of specific staphylococcal proteases and the ability of viruses to increase adhesion of S.aureusin the respiratory tract, to decrease phagocytosis of S.aureus by macrophages/neutrophils and production of antimicrobial peptides, as well as to increase the probability of secondary bacterial co-infection. Therefore, the most important requirement for the empiric therapy agents of CAP is high streptococcal and staphylococcal activity. According to the current guidelines on antimicrobial therapy of severe CAP, antipneumococcic cephalosporins, macrolides, and fluoroquinolones are the basic treatment agents, but none of them have the combined high antistaphylococcal and antipneumococcal activity inherent in ceftaroline. The advantages of ceftaroline over ceftriaxone and levofloxacin in terms of the probability of reaching target concentrations for clinically relevant pharmacokinetic/pharmacodynamic parameters are shown. Meta-analysis of randomized clinical trials showed the higher clinical efficacy of ceftaroline in comparison to ceftriaxone with similar adverse event rate. Summarized analysis of antibiotic susceptibility data, pharmacokinetic/pharmacodynamic and clinical data, as well as negative epidemiological trends confirms the necessity of optimization of antimicrobial therapy of CAP for implementation of ceftaroline advantages against pneumococci and staphylococci in comparison to other β-lactams. Therefore, empiric treatment with ceftaroline is the most rational option for the therapy of CAP in critically ill patients during the season of respiratory viral infection.

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Diversity and seasonal fluctuation of zooplankton in fish pond of Bhadra fish farm, Karnataka

Zoos Print Journal ◽

10.11609/jott.zpj.1464.2935-6 ◽

2007 ◽

Vol 22 (12) ◽

pp. 2935-2936 ◽

Cited By ~ 3

Author(s):

B.R. Kiran ◽

E.T. Puttaiah ◽

Devidas Kamath

Keyword(s):

Seasonal Fluctuation ◽

Fish Farm ◽

Fish Pond

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Researchers in Argentina: Scientific vocation, publication strategies and time‐management tactics

Austral Ecology ◽

10.1111/aec.13055 ◽

2021 ◽

Author(s):

Josefina L. De Paepe ◽

M. Fernanda Reyes ◽

María V. Piazza ◽

Carla E. Di Bella ◽

Pablo A. García‐Parisi ◽

...

Keyword(s):

Time Management ◽

Management Tactics

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Mitogenomic analysis of diversity of key whitefly pests in Kenya and its implication to their sustainable management

Scientific Reports ◽

10.1038/s41598-021-85902-2 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Fathiya M. Khamis ◽

Fidelis L. O. Ombura ◽

Inusa J. Ajene ◽

Komivi S. Akutse ◽

Sevgan Subramanian ◽

...

Keyword(s):

Sustainable Management ◽

Management Strategies ◽

Spatial Models ◽

Abundant Species ◽

Plant Viruses ◽

Pest Species ◽

Agricultural Pests ◽

Protein Coding ◽

Aleyrodes Proletella ◽

Aleurodicus Dispersus

AbstractWhiteflies (Hemiptera: Aleyrodidae) are devastating agricultural pests of economic importance vectoring pathogenic plant viruses. Knowledge on their diversity and distribution in Kenya is scanty, limiting development of effective sustainable management strategies. The present study is aimed at identifying whitefly pest species present in Kenya across different agroecological zones and establish predictive models for the most abundant species in Africa. Whiteflies were sampled in Kenya from key crops known to be severely infested and identified using 16S rRNA markers and complete mitochondrial genomes. Four whitefly species were identified: Aleyrodes proletella, Aleurodicus dispersus, Bemisia afer and Trialeurodesvaporariorum, the latter being the most dominant species across all the agroecology. The assembly of complete mitogenomes and comparative analysis of all 13 protein coding genes confirmed the identities of the four species. Furthermore, prediction spatial models indicated high climatic suitability of T. vaporariorum in Africa, Europe, Central America, parts of Southern America, parts of Australia, New Zealand and Asia. Consequently, our findings provide information to guide biosecurity agencies on protocols to be adopted for precise identification of pest whitefly species in Kenya to serve as an early warning tool against T. vaporariorum invasion into unaffected areas and guide appropriate decision-making on their management.

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The Standing Crop of Net Plankton in Lakes

Journal of the Fisheries Research Board of Canada ◽

10.1139/f53-017 ◽

1953 ◽

Vol 10 (5) ◽

pp. 224-237 ◽

Cited By ~ 15

Author(s):

D. S. Rawson

Keyword(s):

Standing Crop ◽

Seasonal Fluctuation ◽

Western Canada ◽

Inverse Relation ◽

Secondary Effects ◽

Eutrophic Lakes ◽

Trophic Condition ◽

The Past

Plankton sampling has been a part of the program in a number of investigations of lakes in western Canada during the past 20 years. The techniques chosen for this work are discussed and criticized. The resulting data on average standing crop of net plankton are summarized and considered in relation to the kinds of lakes represented. The standing crop in 20 lakes shows an inverse relation to mean depth which is interpreted as indicating that, in most of these lakes, the trophic condition is greatly influenced by morphometry. Deviations from this relation appear to be explained by the secondary effects of climate and edaphic situation.The difference in quantity between the standing crops of net plankton in oligotrophic and eutrophic lakes is not large, and, of course, these lake types intergrade. This lack of sharp differentiation is further obscured by rapid and extensive seasonal fluctuation in amounts of plankton and by the difficulties inherent in present methods of sampling. These circumstances render measurements of standing crop difficult and of only moderate utility in suggesting the trophic type or the possible productivity of a lake.

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