EFFECTS OF EXTRACT OF Flourensia oolepis (chilca) ON OVIPOSITION OF Helicoverpa gelotopoeon (LEPIDOPTERA NOCTUIDAE)

BOLLATI LUCIANA; SEMINARA CECILIA; AVALOS SUSANA; DIAZ NAPAL GEORGINA; PALACIOS SARA; DEFAGO MARIA TERESA

Huerta Grande, Córdoba

Congreso; 2ND LATIN AMERICAN MEETING OF CHEMICAL ECOLOGY; 2012

Sociedad Latinoamericana de Ecología Química

Synthetic insecticides are the most used tool for pest control. However, it has been found that indiscriminate use of these chemicals has resulted in irreversible damage to the environment, non-target species, etc. Currently, botanical insecticides are one of the environmentally acceptable alternatives. Extract of Fluorencia oolepis (Asteraceae) has shown to be effective against several species of insect pests. The purpose of this work was to assess the extract crude effect of F. oolepis on oviposition behavior of Helicoverpa gelotopoeon. This butterfly is polyphagous pest of several economically important crops. Choice tests were performed using the extract of "chilca" [1] on the surface half of the breeding recipients at different doses (1% to 10%), and the other half were sprayed with acetone. Two pairs of butterflies per cone were placed and performed 10 repetitions per dose. Daily observations were made; eggs were counted and established the period of pre-and post-oviposition. The data were analyzed through the ANOVA or Kruskal Wallis, "t " test or Wilcoxon test, and the inhibition rate was calculated. The results showed significant differences in the number of eggs laid on the control surface relative to the extract treated for any of the doses used. Females chose particularly the wall and ceiling of the recipient to attach their eggs, places that can interact with the host plant preferred [2]. Furthermore, the inhibition index showed that the dose of 2.5% had a marked effect on the oviposition deterrent, while 7.5% behaved opposite. Comparable responses were observed with other flavonoids.