MODERN SOIL DESINFECTION AND WEED CONTROL UNDER GLASS
For economic reasons there is a preference for monocultures that are marketable and profitable. The inevitable neglect of proper rotation that results creates a menacing increase in certain pathogens in the soil, consisting mainly of nematodes and fungi but also weeds. Soil sterilization has thus become indispensable to maintain continuous, economic yields
The first effective method of soil sterilization was achieved with soil steaming. Although this method is still often used today, it is steadily becoming of less importance because the high heating and labor costs make it uneconomical.
The first experiments with chemical soil sterilization were carried out with such preparations as formaldehyde, carbon disulfide, and halogenated hydrocarbon. Many products did not prove satisfactory due to their activity or difficulty of application. Through the discovery of dazomet, a compund with a broad spectrum of activity became available.
The wettable powder formulation, however, was not yet the decisive breakthrough, because mechanical distribution of the powder was possible only under certain circumstances and resulted in considerable dust problems.
It was not until dazomet* was brought out in granular form with its finely balanced spectrum of particles that demands concerning biological activity, economical application, and technical production were met.