Potential of weaver ants (Oecophylla smaragdina) as biological control of mango leaf hoppers
2009
Soriano, G.P., Abra State Inst. of Sciences and Technology, Lagangilang, Abra (Philippines)
The study evaluated the potential of weaver ants as biological control for mango leaf hoppers. Three treatments were used: Treatment A (untreated control), Treatment B (insecticides only) and Treatment C (weaver ants only). Results showed that the highest numbers of mango leaf hoppers before flower opening, during flower opening, and after flowering were noted in Treatment A. The highest percentage of mango leaf hopper mortality was observed in Treatment B, the highest number of mango fruits developed at mango-size was observed in treatment C. Treatment B produced the highest number of mango fruits at corn-size and the highest number of fruits harvested (134) followed by treatment C (89), leaving no significant difference between the two treatments. Again, treatment B had the heaviest production (13.79%). Treatment A had the sweetest mangoes harvested with sugar content of 19.15, followed by treatment B with sugar content of 18.34 and treatment C having a sugar content of 18.22. However, a very slight difference on the percentage of fruit damaged was noted between Treatments B and C. Treatment C posted the highest net income with a return on investment of 224.39%.
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