Seasonal Fluctuations of the Phytonematode Communities in Forage Legumes-Planted Field
Journal Title: Egyptian Journal of Agronematology - Year 2015, Vol 14, Issue 1
Abstract
Population levels of phytonematodes found in the upper 25-cm soil planted with forage legumes were determined at monthly intervals for one year. Nematode species of Meloidogyne, Criconemella, Paratrichodorus, Tylenchorhynchus, Pratylenchus, Belonolaimus and Hoplolaimus reached almost peaked levels in fall at temperature range from 18.8-24.6 C. Also, most of these genera reached their lowest levels about forty days after removal of the host crop at a soil temperature of 29 C. Soil population densities of Meloidogyne spp., which were dominant through much of the year, fluctuated considerably. Paratrichodorus spp. declined progressively through the summer whereas Pratylenchus spp. were almost at nondetectable levels only during this period. Criconemella spp. were the only nematodes that had a progressive increase during summer months. Tylenchorhynchus spp. increased from non-detectable level in August to relatively high levels in the next two months. Species of Belonolaimus seemed to fluctuate in unison with that of Hoplolaimus spp. but both were of low densities through much of the year.
Authors and Affiliations
Mahfouz Abd-Elgawad, Mohamed Eissa, Abd-Elmoneim El-Gindi, Grover Smart
Keywords
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