ISHS Acta Horticulturae 589: X International Asparagus Symposium
WEED CONTROL DURING ASPARAGUS ESTABLISHMENT YEAR IN A VOLCANIC SOIL OF CHILE |
| Authors: | A. Pedreros, M.I. González, C. Guadamud |
| Keywords: | Asparagus officinalis L., crowns, herbicides, metribuzin, pendimethalin, linuron. |
| Abstract:
A field experiment was carried out in a volcanic soil, pH 5.7, O.M. 12.5 %, in the southern-central area of Chile. Four herbicide treatments were evaluated during asparagus establishment year, all with linuron (1.0 kg i.a. ha-1) at pre emergence, but three of them followed by linuron (1.0 kg i.a. ha-1), metribuzin (0.96 kg i.a ha-1), or pendimethalin (1.5 kg i.a. ha-1) at post emergence. A weedy check was used as control. Post emergence herbicides were directly sprayed over the weeds, when asparagus plants were 5 to 15 cm tall, avoiding contact with top fern. ‘UC-157 F2’ crowns were planted in October (spring) 1999. Analysis of variance showed that the check without herbicides had the greater weed production, mainly broadleaf, while grasses were low-density throughout the experiment. Weed population decreased with all sprayed herbicides, but the best treatments were linuron at pre emergence followed by metribuzin or pendimethalin at post emergence. Plots treated with metribuzin had taller asparagus plants, the greater production of asparagus dry matter, and the higher spear production, whereas the weedy check had the lowest asparagus dry matter. The increment in yield in the first harvest season when metribuzin was sprayed was about 240 % of the weedy check. | |
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