| 摘要 |
<p>The effect of certain agricultural chemicals, viz. fungicides, herbicides, insecticides, nematicides and plant-growth regulators, is improved by co-administration of them with one or more additives which modify the uptake of the chemical by modifying physico-chemical properties of the leaf or which alter the physical relationship between the agricultural chemical and the leaf surface such that the uptake of the agricultural chemical is altered beneficially including by holding the agricultural chemical in a layer on the leaf surface during a period when it is not needed by the plant (as during the winter months) and then releasing it as a result of increased temperature and/ or light degradation in the spring. The invention provides compositions containing one or more of the said agricultural chemicals and one or more of the said additives, and methods of improving the harvest of a given crop by applying it to one or more of the said agricultural chemicals and one or more of the said additives simultaneously or within up to about 15 days of one another. The compositions may be made up with purgatives e.g. phenolpthalein, or emetics such as apomorphine and ipecahuana although the additives themselves have the ability to reduce the mammalian toxicity of agricultural chemicals with which they are mixed. </p> |
