Influence of seed tuber infestation, chemical seed treatment, and pre-harvest climate on incidence of gangrene and dry rot of potato (Solanum tuberosum L.)

The effect of endophytic Bacillus subtilis (strains 10-4, 26D) and their compositions with salicylic acid (SA) on some resistance and quality traits of stored potatoes infected with Fusarium dry rot were studied. The experiments were carried out on hydroponically grown Solanum tuberosum L. tubers that were infected before storage with Fusarium oxysporum and coated with B. subtilis 10-4, 26D with and without exogenous SA, and then stored for six months. It has been shown that 10-4, 26D, 10-4 + SA, and 26D + SA reduced in different levels (up to 30–50%) the incidence of F. oxysporum-caused dry rot (with the highest effect for 10-4 + SA). SA notably enhanced the positive effect of 10-4, while for 26D, such an effect was not observed. All of the tested treatments increased amylase (AMY) and AMY inhibitors activity in infected tubers, while decreased Fusarium-induced protease activity (except in the case of 10-4 + SA, which promoted a slight increase) was revealed. 10-4, 26D, and their compositions with SA decreased (in different degrees) the pathogen-caused lipid peroxidation, proline, and reducing sugars accumulation in potatoes after long-term storage. It was also discovered 10-4 and 26D, regardless of SA presence, decrease pathogen-induced glycoalkaloids α-Solanine and α-Chaconine accumulation and preserved increased levels of starch and total dry matter in infected stored potatoes. The findings indicate endophytic B. subtilis and its compositions with SA is a promising eco-friendly and bio-safe approach to cope with postharvest decays of potato during long-term storage; however, when developing preparations-compositions it should take into account the strain-dependent manner of B. subtilis action together with SA.

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Effect of inter and intra row spacing on seed tuber yield and yield components of potato (Solanum tuberosum L.) at Ofla Woreda, Northern Ethiopia

African Journal of Plant Science ◽

10.5897/ajps2014.1153 ◽

2014 ◽

Vol 8 (6) ◽

pp. 285-290 ◽

Cited By ~ 2

Author(s):

Abrha Harnet ◽

Belew Derbew ◽

Woldegiorgis Gebremedhin

Keyword(s):

Solanum Tuberosum ◽

Yield Components ◽

Tuber Yield ◽

Seed Tuber ◽

Solanum Tuberosum L ◽

Row Spacing ◽

Northern Ethiopia ◽

Yield And Yield Components

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Interactive Effects of Vermicompost and Seed Tuber Size On the Production of Potato (Solanum Tuberosum L.)

Bangladesh Journal of Botany ◽

10.3329/bjb.v50i3.55850 ◽

2021 ◽

Vol 50 (3) ◽

pp. 695-700

Author(s):

Maruf Mostofa ◽

Tuhin Suvra Roy ◽

Rajesh Chakraborty

Keyword(s):

Solanum Tuberosum ◽

Seed Tuber ◽

Solanum Tuberosum L ◽

Maximum Yield ◽

Tuber Size ◽

Interactive Effects ◽

Factor B ◽

Yield Parameters ◽

Two Factors

An experiment was conducted to find out the effect of vermicompost and seed tuber size on the yield of Potato. The experiment consisted of two factors, i.e., factor A: Vermicompost level (Vc-4): Vc1: 0 t/ha, Vc2: 3 t/ha, Vc3: 6 t/ha and Vc4: 9 t/ha; factor B: Tuber size (T-5): T1: 5 - 10 g, T2: 10 - 20 g, T3: 20 - 30 g, T4: 30 - 40 g and T5: >40 g. Vermicompost was found to have a significant effect on most of the yield contributing parameters. Results showed that yield parameters increased with increasing vermicompost level irrespective of tuber size. Among the 20 treatment combinations, vermicompost @ 9 t/ha with tuber size > 40 g produced the maximum yield (31.33 t/ha) that was 216.82% higher than Vc1T1. Bangladesh J. Bot. 50(3): 695-700, 2021 (September)

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

One Health & Risk Management ◽

10.38045/ohrm.2021.3.06 ◽

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.

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