الفهرس 
Nematicides from FungiOnly 14 pages are availabe for public view
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Abstract
These experiments were carried out under field conditions at Elnubaria Province and at
the laboratories of The City of Scientific Research and Technology Applications, Alexandria,
Egypt to recognize plant parasitic nematodes infecting sugar beet plants and to evaluate two
antagonistic microbe formulations and two plant extracts in the management of root knot
nematode, Meloidogyne incognita infecting sugar beet, Beta vulgaris L cv. DS 9002. The tested
biocontrol agents were : Serratia marcescens , Trichoderma harzianum , Nemastop and neem
oil. Furthermore greenhouse experiments were done to evaluate the effect of the infection of
sugar beet plants with root knot nematode , M. incognita on the concentration of plant enzymes.
The results indicated that the biocontrol agent of the fungus , T. harzianum gave the highest
increases in the vegetative characters of sugarbeet plants i.e. root diameter, root scale, root
length, total weight root, total foliage weight, and total weight plant. Moreover, results indicated
that the bacterium biocide, Serratia marcescens gave the highest reduction percentages of root
gall numbers and egg mass numbers, followed by the fungus biocide, T. harzianum , and neem
oil extract. All treatments significantly increased the total soluble solids and the total sugar
content of roots. Treatments increased the protein content of sugar beet roots except the
treatment of Nemastop which decreased the protein content, while in leaves all treatments
significantly increased the protein content. As for the Effect of root knot nematode,
Meloidogyne incognita, infection to sugar-beet (Beta vulgaris L.) cvs. Tenor and DS9001 on the
concentrations of Catalase , Peroxidase , Poly phenyloxidase , Polyalanine aminolyase (PAL)
enzymes in leaves and roots of plants after 5 and 10 days of inoculation, results indicated that
Catalase , Peroxidase enzymes were significantly increased at the leaves and roots of infested
plants after 10 days of nematode inoculation with some exceptions. poly phenyloxidase was
greatly increased at the leaves of both varieties after 5 and 10 days of nematode inoculation
while it was decreased at roots of Tenor variety. Polyalanine aminolyase (PAL) was
significantly increased at roots and leaves of Tenor variety while the effect was almost negative
with DS9001 variety.
Key words: Sugar beet, plant parasitic nematodes, Meloidogyne incognita