المكافحة المتكاملة لنبات الحلفا Imperata cylindrica (L.)‎ Beauv

Abstract EN

This experiment was carried out in a special orchard at Abol-Khasib region, South of Basrah.

Rhizomes of cogon grass were cultivated in a muddy soil which was sterilized with bazmid and treated with two species of pathogens Rhizoctonia solani and Trichoderma harzianum in addition to solarization using yellow, blue and black plastic sheets extended to three weeks during summer 2012.

Results showed the decrease of germination percentage in the covered treatments where the general rate was 42.15 % compared to 50.7 % in the uncovered soil.

The least percentage of germination was under yellow sheets reaching 36.8 %.

Treatment of soil with R.

solani and T.

harzianum was effects in reducing the percentage of germination to 50.76 % and 50.16 % respectively in comparison with 61.3 % in untreated soil.

It was clear that solarization effects in combination with the two pathogens .

Percentage of germination in soil treated with R.

solani and yellow cover was 15.15 % , The same combination was effective in decreasing shoot height .

The minimum length was in the treatment with R.

solani and blue cover reaching 7.76 cm in comparison with control which was 10.24 cm.

Solarization in combination with the two fungi reduces the fresh and dry weights of shoot and root systems.

The minimum dry weights of shoots in treatment with R.

solani with yellow cover were 0.34 gr and the minimum dry weights of roots was in the treatment of T.

harzianum and yellow cover 0.12 gr respectively in comparison with control which was 0.26 gr and 0.27 gr.