Composition containing ultra-violet absorbing metal oxide and superspreading agent, useful for protecting crop plants against damage by sunlight

摘要

Composition (A) contains at least one UV-absorbing metal oxide powder (I) where (a) (I) has specific surface area at least 20 m 2/g and (b) the composition contains at least one 'superspreading' agent (II). An independent claim is also included for a method for preparing (A). ACTIVITY : Plant Protectant. A dispersion containing 35wt.% TiO 2(pyrogenic, aggregated particles of BET surface area 50m 2/g), 21wt.% polyacrylic acid and 46wt.% water (sic) was diluted to contain 0.33wt.% oxide and the superspreading agent Break-Thru(RTM) S240 added at 0.041wt.%. The mixture was applied to beans at 300 l/hectare; mean photosynthetic capacity of treated plants was 1.60 mu mole/m 2/s, with UV-induced damage (on a scale 0= no damage; 4= severe damage) 1.125 after 24 hours; contrast 1.78 mu mole/m 2/s and 2.075 for untreated control plants. MECHANISM OF ACTION : Absorption and reflection of UV light.