scholarly journals Effect of a Neem preparation on reproduction of the nematode Globodera rostochiensis and growth of potato

2012 ◽  
Vol 57 (2) ◽  
pp. 91-97
Author(s):  
Zlatka Trifonova
Keyword(s):  
Population Density ◽  
Plant Growth ◽  
Potato Tuber ◽  
Globodera Rostochiensis ◽  
Cyst Nematode ◽  
Potato Cyst Nematode ◽  
Growth And Yield ◽  
Nematode Reproduction ◽  
Soil Application

An experiment was conducted under glasshouse conditions to test the effects of neem-based product in the form of drenches and potato tuber treatments on the growth of potato and population density of the potato cyst nematode Globodera rostochiensis. The soil applications of the biopreparation improved the plant growth and yield of potato, being greatest with 1% Neem Azal. The biggest increase in the yield occurred in the Oxamyl application (15.8%). The biopreparation in concentrations from 0.2% to 1% increased the yield of potatoes from 0.3% to 9.7% compared to the untreated inoculated control. The soil application was relatively more effective in increasing of the yield (0.3%-9.7%) than the potato tuber treatments (0.3%-2.3%). The nematode reproduction was reduced 83.3% with Oxamyl and from 59.8% to 71.0% with Neem Azal treatments.

scholarly journals ACC Deaminase Producing PGPR Bacillus amyloliquefaciens and Agrobacterium fabrum along with Biochar Improve Wheat Productivity under Drought Stress

Agronomy ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 343 ◽  
Author(s):  
Muhammad Zafar-ul-Hye ◽  
Subhan Danish ◽  
Mazhar Abbas ◽  
Maqshoof Ahmad ◽  
Tariq Muhammad Munir
Keyword(s):  
Drought Stress ◽  
Plant Growth ◽  
Grain Yield ◽  
Bacillus Amyloliquefaciens ◽  
Nutrient Retention ◽  
Acc Deaminase ◽  
Growth And Yield ◽  
Yield Traits ◽  
Straw Yield ◽  
Soil Application

Drought stress retards wheat plant’s vegetative growth and physiological processes and results in low productivity. A stressed plant synthesizes ethylene which inhibits root elongation; however, the enzyme 1-Aminocyclopropane-1-Carboxylate (ACC) deaminase catabolizes ethylene produced under water stress. Therefore, the ACC deaminase producing plant growth promoting rhizobacteria (PGPR) can be used to enhance crop productivity under drought stress. Biochar (BC) is an organically active and potentially nutrient-rich amendment that, when applied to the soil, can increase pore volume, cation exchange capacity and nutrient retention and bioavailability. We conducted a field experiment to study the effect of drought tolerant, ACC deaminase producing PGPR (with and without timber waste BC) on plant growth and yield parameters under drought stress. Two PGPR strains, Agrobacterium fabrum or Bacillus amyloliquefaciens were applied individually and in combination with 30 Mg ha−1 BC under three levels of irrigation, i.e., recommended four irrigations (4I), three irrigations (3I) and two irrigations (2I). Combined application of B. amyloliquefaciens and 30 Mg ha−1 BC under 3I, significantly increased growth and yield traits of wheat: grain yield (36%), straw yield (50%), biological yield (40%). The same soil application under 2I resulted in greater increases in several of the growth and yield traits: grain yield (77%), straw yield (75%), above- and below-ground biomasses (77%), as compared to control; however, no significant increases in chlorophyll a, b or total, and photosynthetic rate and stomatal conductance in response to individual inoculation of a PGPR strain (without BC) were observed. Therefore, we suggest that the combined soil application of B. amyloliquefaciens and BC more effectively mitigates drought stress and improves wheat productivity as compared to any of the individual soil applications tested in this study.

Potato cyst nematode hatching activity and hatching factors in inter-specific Solanum hybrids

Nematology ◽  
2001 ◽  
Vol 3 (2) ◽  
pp. 141-149 ◽  
Author(s):  
Ken Devine ◽  
Peter Jones
Keyword(s):  
Solanum Tuberosum ◽  
Solanum Species ◽  
Globodera Rostochiensis ◽  
Cyst Nematode ◽  
Potato Cyst Nematode ◽  
Species Analysis ◽  
Specific Hybrid ◽  
Hybrid Clones ◽  
Different Levels

AbstractIn studies using three sibling F1 clones from each of five crosses between Solanum tuberosum and different wild tuberbearing Solanum species, root leachate hatching activity towards each of the two potato cyst nematode (PCN) species, Globodera rostochiensis and G. pallida, segregated independently. Sephadex G-10 fractionation of the leachates of S. sucrense-hybrid clones revealed differences between clones in the hatching factor elution profiles for the two PCN species. Analysis of individual hatching factors indicated examples both of selectivity (both PCN species hatched in response to a particular hatching factor, but at different levels of hatching response) and of specificity (only one PCN species hatched in response to a particular hatching factor) of hatching factors. The hatching factor profiles of the S. sucrense-hybrids indicated segregation of hatching factors from the parents, but also detected novel factors unique to specific hybrid clones. Total hatching activity of the root leachate of the S. sucrense clones was positively correlated with the proportion of S. tuberosum-derived hatching factors.

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