MZGJ did not stimulate the growth in this bioassay. There was little effect even where the MZ6J was used in low or high concentrations (from 0 — 1%). It was not sensitive material to growth.

Fig. 4. The curve of concentration of NZ63 and growth of cotyledons.

BAYLATON, BANNER and CYTOZYME retarded the growth of cotyledons directly.. The retardation was increased with a increase in concentration. However, the BAYLATON—treated grasses had the highest clipping yield in greenhouse experiment; the BANNER-treated grasses had better root growth; and the CYTOZYHE-treated grasses was not bad in growth. So we think that these chemicals may indirectly stimulate growth by regulating the endogenous phytohormones and (or) by improving the growth condition, like to kill the pests in soil and on plants.