New Zealand Plant Protection 54 (2001): 80-83
Brassica crops and a Streptomyces sp. as potential biocontrol for clubroot of brassicas
L-H Cheah, G. Kent and S. Gowers
ABSTRACT
Two glasshouse experiments and a field trial were carried out to evaluate the potential of brassica crops which contain high levels of glucosinolates for control of clubroot of brassicas. Brassica rapa crops were grown for about 70 days in a field which was infested with Plasmodiophora brassicae. In the first glasshouse experiment, the leaf and stem of the plants were harvested, chopped into small pieces and mixed with clubrootinfested soil in punnets. Chinese cabbage seedlings were then transplanted into the punnets. In the second glasshouse experiment, soil samples were taken in punnets from plots where the B. rapa crops had been rotary hoed and left to decompose for about three weeks. Chinese cabbage seedlings were transplanted into the punnets. In both experiments, B. rapa-treated soil reduced (P<0.001) the clubroot severity on the root systems of the seedlings compared to the untreated control. A field trial was carried out on clubroot-infested soil to evaluate B. rapa, B. napus and a Streptomyces sp. for clubroot control. The two brassicas crops and Streptomyces sp. reduced (P=0.05) clubroot severity on root systems of Chinese cabbage plants, except where B. napus was planted at a lower rate (8 plants/m2).
Keywords: Brassica spp., biocontrol, biofumigant, Streptomyces sp., clubroot.
Copyright © 2001 New Zealand Plant Protection Society (Inc.).
Refer to the terms of use.
 | Crop rotation with brassicas reduces Phytophthora populations in potato soil L.-H. Cheah, A.T. Marsh, D. Hedderley and R.E. Falloon (2008) New Zealand Plant Protection 61: 256-260 |
© 2007 New Zealand Plant Protection Society (Inc.)