Effectiveness of prophylactic methods in fruit fly management in northern Côte d’ivoire
Minhibo Yves Magloire, Akpesse Akpa Alexandre Moïse, Diby Yao Kan Séraphin, Koua K Hervé
The third most important fruit exported from Côte d'Ivoire after pineapple and banana, the quantities of mangoes exported over the last five years have increased from 10,179 tonnes in 2011 to more than 33,100 tonnes in 2017. Despite its economic importance, a large part of the production does not reach the market due to pressure from flies of the Tephritidae family. In order to reduce this pressure in three northern localities (Korhogo, Sinématiali and Ferkessédougou), a new fly management approach has been initiated. The objective of this study is to evaluate the effectiveness of two prophylactic control methods, namely ploughing plus destruction and collecting plus augmentorium compared to a control (village practices). This work was carried out in the orchards of 9 producers divided into 3 groups, including one group per locality. Method one (1) consisted of collecting the fallen fruit from the ground and placing it in an augmentorium. The second was to plough the soil in order to destroy the pupae buried in the soil. Analyses have shown that both prophylactic methods significantly reduce fly attack rates on mangoes. These methods reduce fly attacks by 7 to 10% from one year to the next and by 50 to 55% compared to control plots. They are also easy to install and less expensive. However, no significant difference could be established between the two prophylactic methods at P=0.685>0. This new control method is to be used to reduce the use of chemicals in orchards.