Abuja Journal of Agriculture and Environment (AJAE)

TAXONOMY OF FALL ARMYWORM (SPODOPTERA FRUGIPERDA J.E. SMITH 1797) INFESTING MAIZE IN THE GUINEA SAVANNA VEGETATION ZONE OF NIGERIA
Author(s): Oyerinde, Akeem Abolade, Okhaifoh, Joy Oluchi and Anjorin, Toba Samuel
Volume/Issue: Volume 1 , Issue 1 (2021)

ABSTRACT:

Taxonomy of Fall Armyworm (Spodoptera frugiperda J.E. Smith 1797) infesting maize in the Southern Guinea Savanna vegetation zone of Nigeria was studied in two States of Niger and Nasarawa as well as Abuja, the Federal Capital Territory (FCT). A total of 1930 Fall Armyworms (FAW) larva were collected from 15 farm locations(farms located) in nine Local Government Areas/Area Councils in the two states and FCT, covering Latitudes (7.8o- 11.3oN and Longitudes 3.2o- 8.8oE). The larvae were bred into adult and both the larva and adult were identified at the Insect Museum of the Department of Crop Protection, Ahmadu Bello University, Zaria. Wing landmarks and body morphometric features were measured with digitalized handheld Miscope microscope 40-140xmag. The mean values of the morphometric feature were 15.58± 1.34 Length of Forewings (LFW), 3.65±0.77 Width of Forewings (WFW), 9.52±0.88 (Length of Hind wings LHW), 2.96±0.38 Width of Hind Wings (WHW), 3.42±0.74 (Total Body Length TBL), 21.71±2.50 (Length of Abdomen LAB), 12.03±6.92 (Width of the Abdomen WAB), 3.04±1.20 (Length of Femur LFE), 3.30±0.46 (Lengths of Tibia LTI) and 3.11±0.86 (Length of Tarsi LTA). The mean Number of Landmark (LNM), Length of Proboscis (PRR) and Antenna (ANT) were 8.33±0.52, 2.02±0.28 and 5.81±1.09 respectively. The findings of this research grouped the Fall Armyworms into one morphoclusters and portrays the use of variations in the wing landmarks and morphometric features of Fall Armyworm as tools that can be adopted for the taxonomy of FAW in the Southern Guinea Savanna vegetation of Nigeria.

KEYWORDS:

Fall Armyworm, Southern Guinea Savanna, Taxonomy, Morphometric features, Wing Landmarks