Table 7.
Rates of QYR301 causing 10% and 50% growth reduction of Ningjing 28 (NJ 28) and Zhongjiazao 17 (ZJZ17), and 50% and 90% growth reduction of 8 weeds, and the selectivity index (SI) between 2 paddy hybrids and 8 weeds in a greenhouse study 21 d after treatment (DAT).
| Trial plants | GRa10(SE) | GR50(SE) | GR90(SE) | SIb NJ28 |
SI ZJZ17 |
|---|---|---|---|---|---|
| g a.i. ha−1 | |||||
| NJ 28 (Japonica) | 1089.4 (22.9) | 1899.4 (26.8) | — | — | — |
| ZJZ 17 (Indica) | 635.4 (19.2) | 1116.5 (25.3) | — | — | — |
| S. nigrum | — | 1.8 (0.5) | 35.7 (6.8) | 30.5 | 17.8 |
| C. bursa-pastoris | — | 8.4 (1.6) | 41.1 (4.2) | 26.5 | 15.5 |
| L. chinensis | — | 30.6 (0.3) | 82.8 (1.2) | 13.2 | 7.7 |
| E. prostrata | — | 31.1 (6.1) | 85.4 (12.1) | 12.8 | 7.4 |
| E. crus-galli | — | 24.3 (1.1) | 93.6 (3.1) | 11.6 | 6.8 |
| M. vaginalis | — | 24.3 (2.9) | 107.6 (8.6) | 10.1 | 5.9 |
| C. iria | — | 20.8 (2.7) | 119.5 (10.1) | 9.1 | 5.3 |
| E. phyllopogon | — | 43.8 (7.9) | 205.6 (12.7) | 5.3 | 3.1 |
aGR, growth reduction. bSI, selectivity index. Selectivity index was calculated by SI (10,90) = GR10(paddy)/GR90(weed).