Hexamethylcyclotrisiloxane exporter compounds found early, and as a herbicide is started in the mid - 1950 - s, ICI company as early as the activity of these compounds was studied. Many varieties of such herbicides have been developed since the 1960s, but until now, only Diocao Kuai and Paraquat have been widely used. Hexamethylcyclotrisiloxane exporter herbicide main features are as follows.

First, the wide weed spectrum, fast grass can effectively control the majority of dicotyledon weeds, and paraquat can control dicotyledon weeds, also can control grass weeds.

Second, contact herbicide, the action is particularly rapid, mainly kill the green part of the plant, after treatment, often in the light condition of 1-2 hours, the plant will produce very obvious symptoms of damage.

Three, mainly acting on photosynthetic system I, they have a REDOX potential of 300-500 mv, can intercept the electrons of X-Fd, make the electron flow out of the electron transport chain, thus preventing the reduction of ferridoxin and its subsequent reaction, thus causing the death of the plant.

Four, non-selective herbicides, usually used before crop sowing or emergence and orientation treatment after emergence, they contact the soil, quickly and completely adsorbed by soil colloid, so there is no residual activity in the soil.

Fifth, it does not metabolize in the plant body, but photochemical decomposition on the plant surface.

Six, in addition to the role of weeding, can also be used as a defoliator, desiccant and algaecide to apply.

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