, Volume 120, Issue 2, pp 303-306

Effect of solarization of soil within plastic bags on root rot of gerbera (Gerbera jamesonii L.)

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Solarization of soil, (potting mix = coarse sand:Eucalyptus marginata fines = 1∶1) infested with 3 fungi pathogenic to gerbera (Phytophthora cryptogea, Fusarium oxysporum andRhizoctonia solani), for 3 to 4 weeks within transparent polyethylene bags controlled root rot of gerbera. Solarization for 2 weeks however, was less effective. All plants grown in the infested potting mix which had been kept in shade for 2, 3 or 4 weeks were severely attacked.

Solarization of soil within plastic bags for 4 weeks also increased availability of nutrients such as NH4 +-N, PO4 and K+ in comparison to bagged soil kept in the shade for the same period.