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[Simple method for producing virus free potato seeds through true seeds under field conditions]. [Arabic]
1995
El Hammady M. | El Bedewy R. | Abo El Abbas F. | Sadik E.A. | Yousef A.
In vitro, Evaluation of Organic and Mineral Treatments Against Potato Black-leg Disease (Pectobacterium atrosepticum)
2024
Sondos Nagdy | Afaf El-Meneisy | Naglaa Balabel | Nagy Abd El-Ghaffar
Potato (Solanum tuberosum L.) is considered one of the main food crops in many countries worldwide. The present work was planned to manage potato black-leg disease using organic treatments as well as mineral-nitrogenous treatments, in addition to examining their effects on the pathogenic bacterium (Pectobacterium atrosepticum) population under artificial inoculation conditions. The obtained data indicated that applications of cabbage, onion and peppermint dry ground leaves as organic matters, and applications of ammonium super-phosphate, potassium sulfate and urea as mineral-nitrogenous fertilizers reduced P. atrosepticum population and black-leg disease of potato compared with the control treatment. In addition, these treatments led to increasing potato yield, while the beneficial effects increased with increasing their doses compared with the control treatment. Meanwhile, the organic matter appeared highly effective compared with mineral-nitrogenous fertilizers in disease reduction. However, mineral-nitrogenous fertilizers appeared highly effective in increasing potato yield. Meanwhile, onion dry ground leaves (organic matter) and urea (nitrogenous fertilizer) were the most effective on the pathogenic bacterium population and severity of the disease compared with other treatments
Show more [+] Less [-]EFFECT OF ASCORBATE, SALICYLATE AND SILICATE ON POTATO PLANT UNDER WATER DEFICIT STRESS CONDITIONS
2019
Amal Mostafa | Sarwat I. | Dawlat Salama | H. Sallam
The effect of different concentrations of ascorbate (As) at 0, 0.25, 0.5 and 1.0 mM, salicylate (Sa) at 0, 0.25, 0.5 and 1.0 mM , in addition to silicate (Si) at 0, 100, 250, and 500 ppm on potato plant subjected to different water regimes; three days interval (control), four days interval (4DI) and five days interval (5DI). Photosynthetic pigments, free proline and malonyldialdehyde (MDA) concentrations, and plant dry matter percentage were determined. Also, tuber yield was recorded and the percentage of tuber dry matter was determined. Water deficit resulted in significant reduction in tuber yield, plant dry matter percentage beside significant increase in free proline and MDA contents. Meanwhile, effects on photosynthetic pigments content and tuber dry matter were inconsistent. The effects of using different concentrations of ascorbate (As) under water deficit provide a superior effect of As at 0.25 mM. Data revealed that ascorbate treatment enhanced tuber yield by improved Chl (a and b) and carotenoids content, with a promoted reduction in free proline content and MDA. Salicylate (Sa) treatment under water deficit exhibited partial enhancement in photosynthetic pigments; where, Sa (1.0 mM) increased Chl a under all water regimes and Chl b at control and 4DI water regimes. While Sa (0.5 mM) improved carotenoids content at 5DI water regimes. The positive effect of salicylate on tuber yield was obvious only at 5DI water regime; as salicylate concentrations (0.25, 0.5 and 1.0 mM) enhanced tuber yield by 65.61, 21.8 and 33.33%. Data exhibited that these increments were concomitant with a reduction in free proline content and a slight increase in tuber dry matter. Interactive effects of Silicate (Si)/water deficit were variable with the concentration under the used water deficit regimes, where, Si (100 ppm), showed higher means of Chl (a and b) with a reduction in free proline contents, at both 4DI and 5DI. The higher tuber yield resulted only at 5DI. More pronounced effect, Si (250 ppm) exhibited increment of photosynthetic pigments, plant dry matter, tuber yield, along with slight reduction in MDA, particularly at 5DI. It could be concluded that silicate treatment alleviated water stress by improving carotenoids content, plant dry matter and reducing both free proline and MDA contents, which attributes enhancement in tuber yield under water deficit. Generally, lower concentrations of As, Sa and Si showed their benefits under higher water stress regimes.
Show more [+] Less [-]EFFECT OF MEPIQUAT CHLORIDE AND POTASSIUM SOURCES ON GROWTH AND YIELD OF PATATO PLANTS (SOLANUM TUBEROSUM L.)
2019
Ali Abo Al-Nagaa
In this study, Two field experiments were conducted in Ourabi operation Farm, Cairo-Ismaellia desert road at Kalubia Governorate. The experiment was carried out during the two seasons of 2013/2014 and 2015/2016, to investigate the effect of plant growth regulator (Mepiquat chloride) with three different potassium fertilizers sources [chemical potassium (KC), foliar potassium (KF) and rock potassium (KR)] on growth development and total yield in potato plants (Solanum tuberosum L. cv. Spunta) . Chemical potassium (control) with / without Mepiquat chloride achieved better plant height, no. of stem and leaf area/plant. Rock potassium with mepiquat chloride obtained the highest productivity of fresh and dry weights, total tuber yield and yield components (weight of tubers, size of tubers, diameter of tubers and number of tubers) following by foliar potassium with mepiquat chloride compared with control treatment.
Show more [+] Less [-][Simple method for producing virus free potato seeds through true seeds under field conditions]
1995
El-Hammady, M. (Ain-Shams Univ., Cairo (Egypt). Faculty of Agriculture) | El-Bedewy, R. | Abo-El-Abbas, F. | Sadik, E.A. | Yousef, A.
Biological control of bacterial soft rot of potato by using fluorescent pseudomonads
1997
Abd-El-Ghafar, N.Y. | Abd-El-Sayed, W.M. (Ain-Shams Univ., Cairo (Egypt). Faculty of Agriculture)
Effect of viral infection on yield and characters of produced potato tubers TPS and commercial cultivars
1995
Abo-El-Abbas, F. | El-Hammady, M. (Ain-Shams Univ., Cairo (Egypt). Faculty of Agriculture) | El-Bedewy, R. | Fayzalla, E.A. | Yousef, A.A.
Bio-organic fertilization of potato under plastic mulches in relation to quality of production and associated weeds
2002
Hussein, H.F. | Radwan, S.M.A. (National Research Center, Cairo (Egypt). Botany Dept.)
pplication of formulated biocontrol fungi against Rhizoctonia Black Scurf disease of potato
2000
Haggag, W.M.E. | Nofal, M.A. (National Research Center, Cairo (Egypt). Plant Pathology Dept.)
nfluence of biofertilization on total phenolic compounds and antioxidative activity of potato tubers, Solanum tuberosum L.
2000
El-Morsi, E.A. | Abdel-Naem, G.F. | Shaker, E.S. | Ghazy, M.A. (Minia Univ. (Egypt). Faculty of Agriculture)