Effect of soil solarization and it's integration with fungicide on cucumber wilt desase in Khouzestan
2005
Dehghani,Ali, Khuzestan Agricultural and Natural Resources Research Center
Soil born fungal desases particularly cucumber wilt is of importance in Khuzestan . The experiment carried out for evaluating soil solarization effects on disease control in a highly infested field in north of province ( Sorkheh and chenaneh in Shush region). The experiment conducted in completely randomized block design (CRBD) with five treatments: 1.transparent polyethylene sheet 2. transparent polyethylene sheet+ manure (40 ton/ha) 3. transparent polyethylene sheet + Methalaxyl (5%graular) 4. Methalaxyl 5. control. Polyethylene sheets used for one month (18 July to 18 August) . Soil sampling carried out in depths 10 and 20 cm in order to evaluating colony forming units (CFUs) of total fungi , Fusarium spp., Macrophomina, Phytophthora spp. and Trichoderma spp. Also, number of diseased plants, and weeds was evaluated.The results revealed that there are statistically sinificant differences between treatments( P5%). So that , colony forming units of total fungi , Fusarium spp., Macrophomina phaseolina , Phytophthora spp and number of diseased plants in treatment 2 (transparent sheet+ manure)was less than the other treatments and 68, 88.72 ,68.19 , 100 ,92.86 percent less than control, respectively ,but ther is not significant different between about Trichoderma spp. under treatments .Control levels in weeds ; Malva rutondifolia , Cyperus rotundus, Convolvulus arvensis and Tribulus terrestris related to transparent sheet+ manure, statistically had a significant different (P5%). and were 97/3, 80 ,100 and 100 percent less than control,respectively.
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