Banca de DEFESA: JESSICA MARIANA SILVA COSTA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JESSICA MARIANA SILVA COSTA
DATE: 23/02/2023
TIME: 13:00
LOCAL: Auditório Hamilton Soutinho
TITLE:

SOURSOUP SEED EMULSIONABLE EXTRACT: POTENTIALITY FOR THE CONTROL OF PLANOCOCCUS CITRI (RISSO, 1813) (HEMIPTERA: PSEUDOCOCCIDAE) IN THE FIELD

KEY WORDS:

white cochineal; Annonaceae plague; Alternative Control.

PAGES: 48
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitossanidade
SPECIALTY: Entomologia Agrícola
SUMMARY:

The mealybug, Planococcus citri (RISSO, 1813) (Hemiptera: Coccidae), has a range of hosts, attacking several crops of agricultural and ornamental importance. It is a pest that is found in tropical, subtropical and temperate regions and for its control, there are few insecticides registered for all affected crops. For sugar apple, Annona squamosa L. (Annonaceae), control methods are non-existent. Thus, research focused on control strategies, including applicability in the field with plant extracts, is a very promising area because it has the advantage of not causing damage to humans, the environment, non-target organisms and not selecting resistant populations. Plant extracts, from species of the Anonnaceae family, have been shown in several studies to be a promising alternative for the control of agricultural pests, including showing selectivity to natural enemies. Thus, the objective of this work was to evaluate the toxicity of the emulsifiable extract of soursop seeds, Annona muricata L. (Annnaceae), on the mealy cochineal, in sugar apple fruits, Annona squamosa L. (Anonnaceae), under laboratory and field conditions. with the Verdinha and Crioula varieties. For that, the experiments were carried out in the sugar apple orchard, Annona squamosa L. (Annonaceae), in the experimental area of the Campus of Engineering and Agricultural Sciences of the Federal University of Alagoas. For the formulation of the emulsifiable extract, different amounts of Span® and Tween®, distilled water and ethanol extract of soursop were used. For lethal and residual effect tests, adult females of P. citri were used. Through contact, the lethal concentrations LC50 and LC99 (0.8% and 2.6%) were estimated, using only the LC99 to evaluate the insecticidal action of the emulsifiable extract. The toxicity of the extract in the laboratory caused mortality of 94.71%, while in the field in the Verdinha and Crioula varieties it was 100% and 97.03%, respectively. The residual effect in the laboratory was more effective with 2 hours of exposure with a mortality of 61.39% at the end of the evaluation. For the Verdinha variety, the best exposure time was 24 hours with a mortality of 87.03%, for the Crioula variety the extract was more promising with 48 hours causing a mortality of 70.76%. The emulsifiable formulation has a lethal and residual effect on adult P.citri females. The morphological characteristic of the Verdinha variety provided an increase in the efficiency of the extract on mealybugs.

BANKING MEMBERS:
Presidente - 2337920 - ROSEANE CRISTINA PREDES TRINDADE
Interno(a) - 1389433 - MARIANA OLIVEIRA BREDA
Externo(a) à Instituição - JOSÉ DAILSON SILVA DE OLIVEIRA