Controle da lagarta do cartucho, Spodoptera frugiperda (J.E. Smith), com o Baculovirus spodoptera, aplicado via água de irrigação

Abstract

Control ofFallArmyworm, Spodoptera frugiperda (J.E. Srnith) with Baculovirus spodoptera through Irrigation WaterThis research was to test the efficiency of Baculovirus spodoptera to control the fali armyworm, Spodopterafrugiperda (J.E. Srnith), sprinkled through irrigation water. Baculovirus sprinkJing was made by means of a portable injector of chernical products connected to the irrigation system with sprinkJers ZAS-30. In the first experiment, the treatments were 3, 5 and 7mm of water, doses of 1.0 x 10 5 ; 6.0 x ICJ4; and 4.0 x lCJ4 polyhedralrnl, resulted from macerated larvae. One hundred larvae were sampled in each replicate during three days, and brought into the laboratory, fed in artificial diet and enclosed in plastic cups of 50 rnl. Results showed that mortality was independent of the water application depth. Mortality varied from 77.5 to 78.9%. In the second experiment, the water depth was constant in ali treatments (6 mm) and the doses from a wettable powderwere O. 72g (2.0 X 10 11 pol/ha); 3.6g(l0.0 x 10 11 pol/ha) and 7.20 (2.0 x 10 12 pol/ha), Fifty plants from each block were sampled during the next three days after irrigation. Results showed that mortality was proportional to the doses used. Mortality in the two highest dosages (89.3 and 90. 7%) differed significantlyfrom the mortality ofthe lowest doses (62.6%). The presence ofparasitoids was high in both experiments, with peak values from 58 to 63%.

Metarhizium rileyi biopesticide to control Spodoptera frugiperda: Stability and insecticidal activity under glasshouse conditions

“…S. frugiperda is a polyphagous insect, with approximately 186 host plants including corn, rice, cotton, peanut, alfalfa, potato, tomato, soybean and sorghum (Casmuz et al 2010). The main management strategy is the chemical control, which generates a high dependence with an approximate cost of US$500 to US$600 million per year, directly affecting the production costs (Valicente & Souza 2009).…”

Efficacy of Common Synthetic Insecticides for Management of Fall Armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae) in Egypt

“…Four days after oviposition, the first instar larvae emerge and scrape the leaf, whereas subsequent instars completely consume the leaf, causing severe damage and plant death. The last larval instar is typically found within a leaf sheath (Cruz 1995;Galo et al, 2002;Capinera 2008;Valicente & Tuelher 2009) where it is protected from insecticide applications (Gassen, 1996).…”

Biological Activity of Two Mexican Nucleopolyhedrovirus Isolates and Sublethal Infection Effects on Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae)

“…The Spodoptera frugiperda multiple nucleopolyhedrovirus is a baculovirus that has been isolated from fall armyworm populations in the US, Nicaragua, Colombia, Argentina, Mexico (Berretta et al 1998;Escribano et al 1999;Barrera et al 2011;Ríos-Velasco et al 2011;García-Banderas et al 2020;Hussain et al 2021), and recently in China (Lei et al 2020). Due its insecticidal activity, in the field this baculovirus can cause S. frugiperda mortalities of about 80% (Valicente & Da Costa 1995;García-Banderas et al 2020). However, biological activity of different genotypes of the same baculovirus is variable (Serrano et al 2015).…”