Development of Plant-Parasitic Nematode Populations on Forage Crops under Field Conditions
Journal Title: Egyptian Journal of Agronematology - Year 2017, Vol 16, Issue 2
Abstract
The continuous increase in cost and scarcity of mineral fertilizers resulting from the use of high-cost energy sources has renewed interests in organic recycling and biological nitrogen-fixation to improve soil fertility and productivity. Forage legumes can fix nitrogen from atmosphere which has the merit to offer nitrogen for both crop production and soil fertility. However, plant-parasitic nematodes (PPNs) interactions with leguminous crops can be agronomically damaging under various conditions. The present study examined population development of each of the PPN genera Meloidogyne spp., Paratrichodorus spp., Criconemella spp., Pratylenchus spp., Tylenchorhynchus, and Tylenchus spp. on fourteen legume cultivars (i.e. 'Florida' red clover, 'Nolin' red clover, 'Kenland' red clover, 'Kenstar' red clover, 'Tibbee' crimson clover, 'Dixie' crimson clover, 'Mt. Barker' Subterranean clover, 'Amclo' arrowleaf clover, 'FL - 77' alfalfa, 'Abon' persian clover, 'Wood ford' big flower vetch, 'Seqrest' ball clover, 'Kondinin' rose clover, and 'Chief' crimson clover). The nematode initial and final populations varied considerably among the legume cultivars. Therefore, we adjusted for the rate of nematode multiplication by using analysis of covariance. However, we could not use one of the statistical multiple comparison methods because each treatment had different mean of squares for the experimental error. Consequently, a matrix was designed to test the significance of nematode populations on the cultivars using the t-test. Using a computer program, the exact (numerical) level of statistical significance for nematode densities among the cultivars could be established. Relatively lower populations of the nematode genera were found on 'FL-77' alfalfa plants.
Authors and Affiliations
Mahfouz Abd-Elgawad, Mohamed Eissa, Abd-Elmoneim El-Gindi, Grover Smart
Keywords
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