The present work aimed to evaluate the germination, emergence, vigor and initial development of lettuce (Lactuca sativa L.) cultivars. Nine cultivars belonging to the crespa group,
The objective of this study was to evaluate the effect of organic-matter incorporated into the soil on population densities of the causal agents of the dry rot disease of yam, under field conditions. The experiment was performed in a natural infested area with a mixed population of Pratylenchus coffeae and Scutellonema bradys, in Quebrangulo county (Alagoas state, Brazil) in a randomized block design with five treatments and five replicates. The sources of organic matter used as soil amendments were: coconut husk powder, castor bean cake, cattle manure and chicken manure. Non amended soil was used as a control. Nine months after planting, the tubers were harvested. No statistical differences were found among disease incidence, yam production and nematode population densities in the soil. However, the application of chicken manure reduced P. coffeae population in tubers.
Agroecology is the science that establishes the basis for construction of sustainable farming styles. The consortium usually to stand out as alternative interesting small for producers with structural and financial limitations, because it is an effective cropping system practiced long ago and found in all parts of the world, with greater diversity in the tropics. The experiment was conducted between August to November 2012 in the municipality of Garanhuns-PE/Brazil It had as objective to observe how the lettuce would behave in consortium with the carrot in an agroecological system of production. The parameters evaluated in the experiment were plant height, total weight of the plant, weight of leaves and number of leaves. The data obtained were submitted to a statistical comparison test between averages of the consortium and non-consortium beds, using Student's t-test at a significance level of 5%. It was observed that the consortium between lettuce and carrot presented a significant difference for most of the studied variables, negatively influencing its growth.
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