EFFECT OF THE AQUOUS EXTRACT OF Clibadium surinamense L. TO CONTROL Monalonion dissimulatum Dist. IN COCOA PLANTATIONS (Theobroma cacao L.)
DOI:
https://doi.org/10.24841/fa.v28i2.484Keywords:
bedbug, organic insecticides, Clibadium surinamense, Monalonion disscimulatum, Theobroma cacao, mortalityAbstract
Experiments using plant extracts to control pests have become promising because they are economically viable and sustainable. The effects of different concentrations of an aqueous extract of Huaca (Clibadium surinamense) to control Monalonion dissimulatum in a cocoa plantation (Theobroma cacao) were evaluated. Extracts from C. surinamense leaves were evaluated at concentrations of 0 %, 5 %, 15 % and 30 %. The severity of fruit damage was evaluated with slightly modified Donis scale (1988), considering five degrees of attack. We used a Randomized Complete Design (RCD) with 4 treatments and 12 replicates, resulting in 48 experimental units. The aqueous extracts of C. surinamense at 15 % and 30 % caused a higher percentage of mortality of M. dissimulatum in the nymphal and adult stages. For attack degree 1, treatments with 5 %, 15 % and 30 % aqueous extracts of C. surinamense showed a significant increase in the number of unstuck cobs. As for attack degrees 2 and 3, all the treatments presented a significant reduction in the number of affected cobs. However, for attack degrees 4 and 5 the concentrations of 15 % and 30 % did not result in any affected cobs.
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