scholarly journals Parasitic nematodes in potatoes of different varieties and their interrelations with some arthropods

2021 ◽  
Vol 2 (3) ◽  
pp. 39-47
Author(s):  
Maria MELNIC ◽  
Olesea GLIGA ◽  
Dumitru ERHAN ◽  
Stefan RUSU ◽  
Elena IORDOSOPOL
Keyword(s):  
Solanum Tuberosum ◽  
Fungal Infections ◽  
Solanum Tuberosum L ◽  
Parasitic Nematodes ◽  
Potato Tubers ◽  
Dry Rot ◽  
Mole Cricket ◽  
The Republic ◽  
Ditylenchus Destructor

Introduction. Potato (Solanum tuberosum L.) is susceptible to infestation with an associated complex of different species of parasitic and saprophytic nematodes, bacteria, fungi, and arthropods, which diminish the quality of the product. Material and methods. 10 varieties of potatoes were investigated (Agata, Albastriu-mov, Bella rosa, Concorde, Desiree, Irga, Iagodca, Roko, Romano, Sprinter), cultivated on the territory of the Republic of Moldova. The extraction of nematodes and mites was performed using the Baermann funnels, modified by Nesterov.Results. Multiannual researches on the degree of potato infestation have shown that tubers are preferred by various arthropods (Acaridae), Agriothes spp. (Elateridae), Gryllotalpa gryllotalpa, (Grillotalpidae) and Sciaridae spp . (Sciaridae), which form different interactions with the parasitic nematodes of tubers (Ditylenchus destructor, D. dipsaci).Conclusions. Solanum tuberosum infested by parasitic nematodes D. destructor in association with saprophytic nematodes and dry rot are colonized by nematophag ous (mites – 80%) and phytophagous arthropods (wireworms – 40%; mole cricket – 50%; flies – 40%). Among the researched arthropods, Rhizoglyphus echinopus were more frequently found, which together with other species actively consume the primary and secondary parasitic nematodes, their mortality constituting up to 90%. In the traumatized by some arthropods potatoes, with the soil, secondary parasitic nematodes, also penetrate, carrying bacterial and fungal infections, subsequently stimulating the total rot of potato tubers.

scholarly journals Nematodofauna of potato tubers in the Republic of Moldova

2021 ◽  
Author(s):  
Maria Melnic ◽  
Keyword(s):  
Solanum Tuberosum ◽  
Fungal Infections ◽  
Ecological Group ◽  
Potato Tubers ◽  
Republic Of Moldova ◽  
Plant Feeding ◽  
The Republic ◽  
Ditylenchus Destructor

According to the multiannual researches, it was observed that, in the conditions of the Republic of Moldova, the Nematodofauna of potato tubers (Solanum tuberosum) of different varieties, collected from deposits, is specific, with the dominance of saprophytes due to the spread of bacteriosis and fungal infections. In the potato tubers, sick with dithylenchosis (phases 4, 5), the presence of 30 spec8es of nematoodes was identified, belonging to 24 genera, 14 families, 5 orders, 2 classes: 1. Class Secernentea, Orders Aphelenchida, Rhabditida and Tylenchida; 2. Class Adenophorea, Orders Dorylaimida and Plectida. Most species (19 species) are saprophytes of the Class Secernentea, Order Rhabditida with the dominance of the Superfamilies Cephaloboidea and Diplogasteroidea. According to the trophic-ecological group, the species detected in the potatoes tubers are included in all 5 groups: plant feeding, hiphal feeding, bacterial feeding, animal predation, omnivorous. In all researched varieties, both in frequency (100%) and density (thousands of individuals/gram of infested tissue) distinguished species Ditylenchus destructor Thorne 1945, Order Tylenchida, Family Anguinidae, which is also the main parasite in the culture of Solanum tuberosum in the Republic of Moldova, capable of causing dithylenhosis, as well as epiphytotics – mass infestation of potatoes in deposits

EFFET DES DATES DE PLANTATION SUR LES POMMES DE TERRE CULTIVEES EN SAISONS COURTES

1981 ◽  
Vol 61 (2) ◽  
pp. 417-424
Author(s):  
R. RIOUX ◽  
H. GENEREUX ◽  
J. GOSSELIN
Keyword(s):  
Solanum Tuberosum ◽  
Solanum Tuberosum L ◽  
Total Yield ◽  
Planting Date ◽  
Tuber Size ◽  
Tuber Growth ◽  
Potato Tubers ◽  
Planting Dates ◽  
Chipping Quality

The effect of planting dates on growth and quality of potato tubers (Solanum tuberosum L.) grown on a wet and cold soil was studied. Ninety days after planting, total yield was higher in plots planted in mid-June than in those planted at the end of May. However, 110 days after planting, yield was higher with the earlier planting dates. Yield at 130 day s after planting was not significantly different from yield at 110 days after planting. Tuber growth ended on 15 Sept. in 1975 and on 30 Sept. in 1974 and 1976. Percentage of tubers 70 mm and more in size was four times higher at 110 than at 90 days after planting for cv. Kennebec at the first planting date. Increase in tuber size was lower for cvs. Norland and Netted Gem and for all other planting dates. In spite of a low increase of specific gravity, chipping quality decreased as harvest was delayed. Percentage of tubers bearing Rhizoctonia sclerote increased as harvesting was delayed.

scholarly journals Effect of Tuber Size and Intra-row Spacing on Yield and Quality of Potato (Solanum tuberosum L.)

2020 ◽  
pp. 30-34
Author(s):  
Dawinder . ◽  
Gurbax Singh ◽  
Amanpreet Singh ◽  
Jagjot Singh
Keyword(s):  
Solanum Tuberosum ◽  
Solanum Tuberosum L ◽  
Tuber Size ◽  
Row Spacing ◽  
Potato Tubers ◽  
Subsequent Growth ◽  
Yield And Quality ◽  
Four Levels ◽  
Plot Design

A study was conducted to determine the effect of tuber size and intra row spacing on potato (Solanum tuberosum L.) yield and subsequent growth in the 2017 production season. The experiment was laid out in a 3x4 combination arranged in a split-plot design with three replications (three levels of tuber size: 20-30 mm, 30-40 mm and 40-50 mm and four levels of intra row spacing's: 8, 12, 16 and 20 cm). For the optimum emergence and successful growth of potato tubers for processable yield, a size of 40-50 mm and spacing of 20 cm between plants, respectively were identified as the best treatments to be used in the study area.

Polyacrylamid-Elektrophorese zur Beurteilung von Proteinen der Kartoffel (Solanum tuberosum L.)

1966 ◽  
Vol 21 (9) ◽  
pp. 879-888 ◽  
Author(s):  
Volkmar Loeschcke ◽  
Hermann Stegemann
Keyword(s):  
Ascorbic Acid ◽  
Solanum Tuberosum ◽  
Pore Size ◽  
Plant Material ◽  
Solanum Tuberosum L ◽  
Protein Pattern ◽  
Potato Tubers ◽  
Active Inhibitor ◽  
Electrophoretic Behavior ◽  
Acidic Proteins

Up to 25 proteins have been found in the sap of potato tubers by polyacrylamid electrophoresis. The mode of preparation and concentration of the plant material was investigated as well as the pretreatment of the polyacrylamid gel to avoid undue retardation of the migrating bands.Sulfite was the most active inhibitor of sap-browning compared with ascorbic acid and cysteine. which did not influence the protein pattern except for one line. The juice had to be dialyzed or filtered through Sephadex G 25 to remove an unkown acidic material which interferes with the more acidic proteins and causes spreading and diffusing of bands. Proteins were concentrated by means of Carbowax MW 20000. For best results ionic contaminations inherent in the gels was removed by electrophoresis before applying the proteins or dyes. Very few proteins were affected by decreasing the pore size of the gel. Ammonium sulfate (40% saturation) precipitated mainly those proteins which are similar in electrophoretic behavior to the albumin- and transferrinregion of human plasma.

scholarly journals Characterization of Streptomyces scabies isolates from potato tubers its pathogenic variations in Rawalpindi District

2014 ◽  
Vol 4 (1) ◽  
pp. 1-6
Author(s):  
S. Shazia ◽  
F. Naz ◽  
A. Rauf ◽  
M. Inam-ul-Haq ◽  
S. Bushra
Keyword(s):  
Solanum Tuberosum L ◽  
Economic Loss ◽  
Streptomyces Scabies ◽  
Potato Tubers ◽  
Yield And Quality ◽  
Isolation And Characterization ◽  
Pathogenic Variation ◽  
Important Disease

Potato (Solanum tuberosum L.) has various biotic constraints in its production due to pest attack. Among these, common scab caused by streptomyces scabies is an important disease in potato which causes economic loss with respect to plant yield and quality of tubers. The present study was conducted to determine the pathogenicity, pathogenic variation, characterization of morphological, physiological and biochemical aspects of Streptomyces associated with potato tubers grown in Rawalpindi district. Severity data and pathogenic variation of disease was studied by using different isolation and characterization techniques.

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