Influência do número de aplicação de insecticidas no rendimento e qualidade de fibra de algodão - Gossypiumspp em Morrumbala

Abstract

A study was carried out in the area of ​​influence of Mepinha, district of Morrumbala, province of Zambézia, with the aim of analyzing the production process of the cotton crop from the point of view of insecticide application by farmers in the family sector who benefit from the development program made by AGRIMO. Data were collected through interviews with 109 farmers who practiced cotton in the last campaign (97/98), in that cotton zone, using a semi-structured survey. In addition to the farmers, an extensionist was also interviewed. The selection of farmers for the interviews was made randomly. Yield and area were obtained from AGRIMO records. Data were analyzed using the statistical package (Software) ST AT A 5.0. The analyzes performed were: variance homogeneity test, variance analysis, mean comparison tests (Duncan test and Student's T test), Correlation analysis, regression analysis and economic analysis (calculation of the additional return obtained by the peasants) , The study showed the influence of the number of insecticide applications in increasing yield and improving the quality of cottonseed. Carrying out 4 applications resulted in a significant increase in total yield. However, 5 applications resulted in an even greater increase in the total yield and quality of cotton. The study allowed us to conclude that 5 applications were important for: Peasants who belonged to the group with 15 or fewer farmers per sprayer, which constitutes 10% of the sample This study also showed that 5 applications are important for farmers belonging to the group with 15 or less farmers per sprayer because it resulted in an increase in yield that produced a return.