[Spatial distribution of plants infested with Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) on corn crop].
The importance of the fall armyworm, Spodoptera frugiperda (J.E. Smith), is not only due to the damage it can cause, but also to its difficult control. It is essential to know the pest population parameters, such as its standard scattering in the crop, because depending on the space arrangement of the insects in the area, different sampling methods are required. For the present work, three experimental fields were installed in different areas: the first one had 66 plots with seven plants each; the second one had 55 plots with four plants each; and the third field had 55 plots with six plants each. The presence or absence of the pest in the plant was evaluated in the samples. According to the data observed, either to the scattering index or to the theoretical scattering models, S. frugiperda dispersion is scattered at random and strongly depends on the infestation level.
de Melo
Elmo P
EP
Depto. Ciências Agrárias - UFGD, Campus de Dourados, Rod. Dourados-Itahum, km 12, C. postal 583, 79.804-970 Dourados, MS.
Fernandes
Marcos G
MG
Degrande
Paulo E
PE
Cessa
Raphael M A
RM
Salomão
Jorge L
JL
Nogueira
Rodrigo F
RF
D000818:Animals; D011157:Population Dynamics; D018411:Spodoptera; D003313:Zea mays / Q000469:parasitology*