الفهرس 
MATERIALS AND METHODSOnly 14 pages are availabe for public view
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Abstract
The present study was included 5 experiments; (1) The occurrence of nematode genera associated with the cultivated fields of peanut plants cvs. Giza4, Giza5 and Aramanch in three governorates, i.e. Behera , Ismalia and Sharkia. The survey revealed the presence of thirteen nematode genera were found to be the most prevalent nematode genera in the six counties surveyed. Meloidogyne was considered to be the serious pest of the peanut crop as it was associated with the three surveyed cultivars and their soil types examined.(2) The seasonal fluctuation of the prevailing nematode species on peanut plants cv. Giza4 under field conditions, nematode species showed that their peaks reached in August with the maximum population densities along with highest soil temperature and then decreased as the soil temperature diminished in September. (3) The impact of M. javanica infection at three levels of inoculation on growth of peanut plant cv. Giza4 under greenhouse conditions, the greater reduction percentage of plant growth response were recorded at inoculum level 2000 (J2) /peanut plant with highest rate of built-up. On the other hand, when the initial inoculum level added increased up to 3000 (J2) /peanut plant, the percentage reduction of whole plant fresh weight and other growth parameters as well as nematode build-up also obviously decreased. (4) The impact of five soil type mixtures on growth of peanut plant cv. Giza4 infected with M. javanica and nematode development under greenhouse conditions, a positive correlation was noticed between soil textures and reduction percentages of whole plant fresh weight was achieved by loamy: sand (2:1) soil textures, Likewise, rate of nematode build-up increased as the rate of sand particles in soil type light in texture increased. However, the lowest value for rate of nematode reproduction resulted by loamy soil texture. (5) The impact of certain animal manures i.e. pigeon, cattle and rabbit or plant products i.e. sesame oil-cake and periwinkle dried leaf powder alone or integrated with oxamyl on growth response, pods yield, and nodules number of peanut cv. Giza4 plant infected with Meloidogyne javanica and nematode development under greenhouse conditions, oxamyl was ranked first in increasing plant fresh weight of peanut infected with M. javanica followed by sesame oil-cake integrated with oxamyl. Moreover, the lengths of shoot and root was positively affected by tested components either singly or integrated with oxamyl when compared to nematode alone. Results also indicate that concomitant treatment obviously gave better results than did single one. Of the tested soil amendments, sesame oil-cake either alone or mixed with oxamyl accomplished the highest values of percentage increase of total plant fresh and shoot dry weights whereas plant receiving either rabbit manure alone or mixed with oxamyl showed the least values for the same plant growth parameters comparing to nematode alone. However, cattle manure either alone or integrated with oxamyl accomplished the highest reduction percentage of final nematode population followed by pigeon manure. Sesame oil seed cake alone accomplished the highest percentage of reduction in nematode parameters, followed by periwinkle dried leaf powder for final nematode population, number of galls and egg-masses on peanut roots, Meanwhile, the concomitant treatments, such as sesame oil-cake plus oxamyl achieved the highest percentage of nematode parameters reduction, followed by periwinkle plus oxamyl for final nematode population, number of galls and egg-masses on peanut roots. Moreover, the least values of the same previous criteria was recorded by rabbit manure either alone or mixed with oxamyl .