Root-knot nematodes (Meloidogyne spp.) are considered as one of the most extensive and devastating agricultural pests all around the globe causing an estimated US $100 billion loss/year worldwide1.
They were broadly distributed in the cultivated regions of Egypt leading to significant crop losses, chiefly with cucumber yields. During the 2 last decades, nematode control was dependant mostly on the application of nematicides. But, use of synthetic chemicals including nematicides is not safe as it carries a lot of serious results and leads towards environmental pollution and pose harmful effect on health as well.
In this regard, potassium silicate is a useful option. It is a source of highly soluble potassium and silicon and employed in agricultural production systems chiefly as a silica adjustment and has the added advantage of supplying little amounts of potassium. Moreover, it lessens the levels of Tylenchulus semipenetrans in soil2.
In addition, no carcinogenicity, mutagenicity or developmental toxicity data is reported for potassium silicate which can be utilized as an alternative tool to avoid environment pollution from pesticides against nematode.
Therefore, scientists conducted a new researchto investigate the effect of procedure and time of potassium silicate application in comparison with oxamyl on M. incognita infecting cucumber under green house conditions.
This study revealed that all tested methods and times of adding potassium silicate obviously improved plant growth parameters and reduced nematode criteria as well. Among tested applications, foliar spraying of potassium silicate once on cucumber plant infected with M. incognita after seven days of its inoculation overwhelmed other methods and times of application in the increment values of plant length, total plant fresh weight, shoot dry weight and number of leaves/plant respectively and in suppressing nematode parameters since its values were amounted to 0.2 for rate of reproduction, final population density, number of galls as well as egg masses even that of oxamyl values comparing to the check.
- Oka, Y., S. Nacar, E. Putievsky, U. Ravid, Z. Yaniv and Y. Spiegel, 2000. Nematicidal activity of essential oils and their components against the root-knot nematode. Phytopathology, 90: 710-715.
- Walker, G.E. and B.G. Morey, 1999. Effects of chemicals and microbial antagonists on nematodes and fungal pathogens of citrus roots. Prod. Sci., 39: 629-637.
- El-Sherif, S. B. Gad and S. M. Saadoon, 2016. Impact of Potassium Silicate Application on Meloidogyne incognita Infecting Cucumber Plant under Greenhouse Conditions. Asian J. Nematol., 5: 1-7.