BOAVENTURA, M. A. D.

PIMENTA, L. P. S.

PRATES, H. T.

VIANA, P. A.

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[41011 INSECTICIDE ACTION OF EmANOLIC EXTRACT FROM ANNONACRASSIFLORA SEEDS AGAINST SPODOPTERA FRUGIPERDAH.T. Prates'. P.A. Vian.', L.p.s. Pimenta', M.A.D. Boaventura'', ' Embrapa Milho eSorgo. Caixa Postal 151, 35701-970, Sete Lagoas, MO. Brazil.: 2 Depto. de Química -ICEx·UfMG. Av. Antonio Carlos, 6627, Caixa Posta! 702, 31270-901. Belo Horizonte,MO, Brazi/. E-mail: htprates@cnprns.embrapa.br.The Annonaceae plant species represent a souree for biologically active acetogenins whichis described with a broad raoge of activities io differeot poteotia! biological roles io thepharmaceutical industry, as cytotoxic, aotitumor, antiparasitic, aotimicrobial andimmunosuppressive, and lately with pesticide activity. Annona crassijlora Mart. is a nativeBrazilian tree growing in the savanna arca ("cerrado") with seeds being traditionally usedin folk medicioe as antidiarrheal and insecticide. Hence, it was included in Ernbrapa Milhoe Sorgo screeniog program against falI armyworm, Spodoplera frugiperda'~hich attacksmaize plant in the field causiog losses of approximately 34 % in crop production.Synthetic insecticides are the conventiona! way to control this insect, However, naturalproducts from plants have been studied as ao ecologically alternative in protecting crops.Bioassays to determioe the insecticide activity were carried out in laboratory withethanolic extract from seeds of A. crassiflora (FOI) at concentration 10000 I1g mL-tincorporated to ao artificial diet. A group of 12 insects were used. Each inseet was fed in a50 mL plastic cup containing 4.8 g of diet with incorporated extract, Two check treatmentswere used with diet without extract (water and acetone). Observations on control efficacywere made I) on mortality (%) according to Abbou procedure 12 days after larvaeeclosion and 2) the development of the live larvae (larva length, weight and width of thehead capsule). Results showed control efficiency of 56.7 %. The surviving larvae were0.19 mm long, weighed I mg and had a head capsule width of 0.35 mm, and a strongnegative effect was observed on its developmeot as compared to the larvae in the checktreatment showing 1.76 mm long, 329 mg ofweight and a head capsule width of 2.27 mm.Therefore, seeds ethaoolic extract presents potenrial insecticide action against rhis insecr.Index terrns: Annonaceae, fali armyworm, natural insecticide, Zea mays

Insecticide action of ethanolic extract from annona crassiflora seeds against Spodoptera frugiperda.

http://www.alice.cnptia.embrapa.br/alice/bitstream/doc/484438/1/Insecticideaction.pdf

Insecticide action of ethanolic extract from annona crassiflora seeds against Spodoptera frugiperda.

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