الفهرس 
Effects of some inorganic fertilizers on the entomopathogenicOnly 14 pages are availabe for public view
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Abstract
This study was conducted in the Biological Control Laboratory, Department of Economic Entomology and Agricultural Zoology, Faculty of Agriculture, Menoufia University, in order to estimate the efficiency of two types of entomopathogenic nematodes against some insects such as the greater wax worm, cotton leafworm, and black cutworm. In addition to study the effect of some fertilizer compounds used in the field on the two species of nematodes under test. The effect of some microelements on the efficiency and vitality of the two species of entomopathogenic nematodes was also tested. The most important results indicated that the concentration of 1600 infective stages of the insect-pathogenic nematodes gave the highest results against each of the great wax worm, the cotton leaf worm and the black cut worm, while the concentration of 50 infective stages gave the lowest results of insect reduction under the experiment. The results of the effect of macronutrients on the activity of insect-pathogenic nematodes showed that ammonium sulfate recorded the highest values against nematode close to 100%, followed by urea about 90%, then ammonium nitrate 89%, diammonium phosphate 53%, NP nitrogen and phosphorus compound 31%, and finally the mixture of NPK nitrogen, phosphorus and potassium 21%. . As for the effect of the mixture of microelements (manganese - zinc - iron), it gave the highest values in reducing the two entomopathogenic nematode species in the range of 90%, followed by manganese 87%, then zinc 83% and finally iron 78%.