Broadcast carriers for pesticides and their use
US6375969B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 6, 1999 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Jul 6, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01N25/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention relates to certain natural diatomaceous earth granule compositions which can be broadcast, i. e., dry spread on the soil to deliver a pesticide or fertilizer. The granules retain their physical integrity when spread, and have the unique property to spontaneously disintegrate when irrigation water is applied or rainfall hits the particle. Upon wetting, the particle disintegrates (blooms) to cover the soil surface. This bloom can cover an area many times the original area covered by the granule. The granules have high loadings of the diatomaceous earth, i.e. from about 35 to about 95 weight percent and contain from about 5 to about 40 weight percent of a surfactant system which exhibits excellent disintegration; rewetting and binding properties. Bioactive compounds can be loaded at up to 60 weight percent of the granule. Bioactive compounds may be formulated products or technical grades and may be homogeneously distributed throughout the granule or spray impregnated onto the granule.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.