scholarly journals Pathogenicity and population dynamics of foliar nematode, Aphelenchoides besseyi infecting tuberose in West Bengal, India

2019 ◽  
Vol 40 (6) ◽  
pp. 1159-1163
Author(s):  
S.C. Bala ◽  
◽  
R. Nihal ◽  
M.R. Khan ◽  
◽  
...  
Keyword(s):  
Population Dynamics ◽  
West Bengal ◽  
Aphelenchoides Besseyi ◽  
Foliar Nematode

scholarly journals Management of Aphelenchoides besseyi infecting Polianthes tuberosa in West Bengal, India

2020 ◽  
Vol 41 (6) ◽  
pp. 1774-1780
Author(s):  
V. Kadam ◽  
◽  
R.K. Patidar ◽  
R. Thangjam ◽  
M. Pathak ◽  
...  
Keyword(s):  
Plant Growth ◽  
West Bengal ◽  
Growth Parameters ◽  
Infected Plant ◽  
Germination Percentage ◽  
Nematode Population ◽  
Stunted Growth ◽  
Aphelenchoides Besseyi ◽  
Untreated Check ◽  
Foliar Nematode

Aim: The study was conducted for management of foliar nematode, Aphelenchoides besseyi through different treatment modules in tuberose, Polianthes tuberose. Methodology: A field experiment was carried out with seven treatment modules with four replications to assess the efficacy of treatment modules to manage the foliar nematode in tuberose variety, Calcutta Double. Observations on germination percentage and spike emergence as well as initial and final nematode population in bulbs and plant growth parameters were analysed.? Results: The experiment was conducted with naturally infected plant of tuberose bearing an initial nematode population per five bulbs. The per cent change over treated bulb was found significantly different from the control. The experiment revealed that the germination percent of tuberose bulbs increased under the treatment modules compared to untreated control. Emergence of 55 per cent and 100 per cent spike in treatment modules was earlier than the untreated check. Plant growth parameters were superior in treatment modules as compared to control. Symptoms like stunted growth of plants prickle like structures on the scape and flower and hardy brown flowers in untreated plants were not found in the treated plots.? Interpretation: Symptom development in different parts of tuberose plants increased with increase in population of foliar nematode rendering to the unmarketable tuberose plants. Therefore, an urgent need of management of foliar nematode is documented with seven treatment modules and the modules were found effective in managing the nematode population in field condition.

scholarly journals Foliar Nematode Aphelenchoides spp. (Nematoda: Aphelenchida: Aphelenchoididae)

EDIS ◽  
2020 ◽  
Vol 2020 (3) ◽  
Author(s):  
Lindsay Wheeler ◽  
William Talmadge Crow
Keyword(s):  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Plant Feeding ◽  
Plant Parasites ◽  
Aphelenchoides Besseyi ◽  
The Common ◽  
Aphelenchoides Fragariae ◽  
Foliar Nematode ◽  
Plant Parasitic ◽  
Aphelenchoides Ritzemabosi

There are nematodes of several genera that feed on plant stems and foliage, including Aphelenchoides, Bursaphelenchus, Anguina, Ditylenchus and Litylenchus. Herein, we apply the common name “foliar nematode” specifically to plant-feeding nematodes in the genus Aphelechoides, specifically Aphelenchoides besseyi, Aphelenchoides fragariae, and Aphelenchoides ritzemabosi. While most members of Aphelenchoides are fungivorous (feed on fungi), these three species have populations that are facultative plant-parasites that can feed on live plant tissue. Ten other species of Aphelenchoides also are recognized as facultative plant-parasites, but these are not as commonly encountered or as economically significant as the aforementioned species. Unlike most plant-parasitic nematodes, foliar nematodes can infest the aerial portions of plants rather than dwelling strictly in soil and plant roots. Damage from their feeding can reduce yield in food crops and ruin the appearance of ornamentals.https://edis.ifas.ufl.edu/in1279

Foliar nematode, Litylenchus crenatae ssp. mccannii , population dynamics in leaves and buds of beech leaf disease-affected trees in Canada and the US

2020 ◽  
Vol 50 (3) ◽  
pp. e12599
Author(s):  
Sharon E. Reed ◽  
Sylvia Greifenhagen ◽  
Qing Yu ◽  
Adam Hoke ◽  
David J. Burke ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Leaf Disease ◽  
The Us ◽  
Foliar Nematode

Population Dynamics Among the Totos of West Bengal: A Positive Response to Culture Contact

1983 ◽  
Vol 15 (2) ◽  
pp. 237-245 ◽  
Author(s):  
Debasish Sinha ◽  
Bikas Chandra Pal
Keyword(s):  
Population Dynamics ◽  
Population Structure ◽  
Death Rate ◽  
Birth Rate ◽  
West Bengal ◽  
Positive Response ◽  
Developmental Change ◽  
Demographic Data ◽  
Culture Contact ◽  
Sex Structure

SummaryThe population structure of the Toto tribe at Totopara, a small village in West Bengal, District Jalpaiguri, was studied, for since 1951 the Totos have been coming more and more in contact with the outside world and undergoing a process of cultural and developmental change. Demographic data presented include the age-sex structure, marital status, fertility, birth rate, death rate and population growth trends in the pre-contact and contact era. At present the population shows a trend towards increase.

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