EFFECTS OF LIGHT AND TEMPERATURE INTENSITY ON REEMER- GENGE OF SORGHUM HALEPENSE

摘要

Several years investigations on herbicide kvizalofop-etyl and fenoksaprop-etyl on Sorghum halepense in sugar-beet and pears were carried out. The efficiency of these herbicides was very good in sugar-beet and weak in pears, although they were appliedin the same quantities and almost in the same way. In order to clear up the difference in the efficiency, the misurations of light and temperature intensity as the most important factors for this kind of occurence were carried out. It was proved that those two ecological parameters were decisive in the retrovcgetation of Sorghum halepense. Namely, as an extreme heliofit and thermofit this species had favorable light and temperature conditions during the whole vegetation period in pear, due to the way of growing. In contrast to pear, in sugar-beet favorable conditions lasted only untill the crop closed the rows.