Factors influencing the effectiveness of non-pathogenic Fusarium solani strain Fs5 in the suppression of root-knot nematode in tomato

摘要: Four experiments were carried out under greenhouse conditions to evaluate the effectiveness of Fusarium solani strain Fs5 against root-knot nematode Meloidogyne javanica. The effect population densities M. javanica, various application rates F. solani, moisture regimes and levels benzaldehyde, a volatile compound of plant origin affecting plant-nematode-fungus interaction, also studied. solani parasitized eggs females of M. javanica thereby reduced severity in tomato. Although fungus was frequently isolated from root tissues, it did not produce phytotoxic symptoms; instead, there enhanced plant growth. At higher nematode densities, inner colonization by increased. fungal infection on eggs and females increased with increasing inoculum levels. Nematode invasion and subsequent soil moisture, both solani-treated untreated plants. However, root-knot development lower at all when applied soil. Root colonization by parasitism female nematodes highest 50% holding capacity (MHC) whereas egg greatest 75% MHC. With concentration benzaldehyde soil, nematode penetration subsequent progressively reduced. solani was treated 2 µg g-1 presence Increasing benzaldehyde concentrations resulted but eggs. Treatments led better growth they combined