African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6849

Full Length Research Paper

Combined effect of rates, insecticides and action mode on the controlling the fall armyworm, Spodoptera frugiperda on maize

Egas José Armando1*, Horácio Laitela Monica3, Simião Gabriel Balane1, Bartolomeu Félix Tangune1, Jorge Wilson Cortez2 and Sálvio Napoleão Soares Arcoverde2  
1Department of Rural Engineering, Eduardo Mondlane University, Mozambique. 2Faculty of Agricultural Sciences, Federal University of Grande Dourados, Brazil. 3Agriculture Bureau of Inhambane Province, Mozambique.  
Email: [email protected]

  •  Received: 25 October 2022
  •  Accepted: 23 February 2023
  •  Published: 31 May 2023

Abstract

This work aimed to evaluate the combined effect of rates, insecticides and of action mode to control the Fall armyworm, Spodoptera frugiperda in the corn crop. The trial was conducted in, Vilankulo distrit, Mozambique, based on a completely randomized block design, on factorial arrangement, consisting of three factors: (i) Application rate, with five levels: 100% - recommended, -5% below the recommended, -10% - below the recommended, +5% above the recommended and +10% above the recommended; (ii)  Insecticide, with three levels: Pirimiphos metilo + deltametrina; Emamectin benzoate; Profenophos + Cypermethrin; and (iii) Action mode, with two levels: Contact and systemic action. The trial had 3 repetitions, 30 treatments and 90 plots, in 2 ha. The evaluated parameters were infested plants with eggs, larvae, and adults of S. frugiperda; crop height and yield. The results showed a significance effect of the action mode to the infected plants with S. frugiperda. In addition, the mean test showed that the addition of +5% controlled egg methamorfose for all pesticides. The pesticide Pirimiphos metilo+ Deltametrina in systemic (applied every 14 days) had a good efficiency on controlling adults.

Key words: Crop protection, application technology, corn, Spodoptera frugiperda