Biological and Morphological Parameters of Armyworm, Spodoptera litura in Cabbage and Maize Plants under Laboratory Conditions in Southern Punjab, Pakistan
Keywords:
Armyworm, cabbage, laboratory conditions, maize, pest, Spodoptera lituraAbstract
This study evaluates the biological and morphological parameters of Armyworm, Spodoptera litura in cabbage and maize plants under laboratory conditions in Southern Punjab, Pakistan. Armyworm, Spodoptera litura is economically an important pest of various agricultural and horticultural crops. The incubation period of eggs was 3-4 days while survival days of 1st, 2nd, 3rd, 4th and 5th larval instars were 2-3, 2-4, 3-4, 3-4 and 2-3 days, respectively on maize crop. The total life period of larvae was 10-17 days (12.9±4.02). The total developmental period from egg to adult on cabbage was 28-36 days while total life period from egg to adult was 25-38 days on maize. The female longevity period was more than male and a single female laid about 890 eggs in her whole life period. The egg width at cabbage and maize was 3.09±0.2 and 3.0±0.3mm respectively. The length and width of first instar was 3.5±0.03 and 0.28±0.14mm respectively. The length of second, third, fourth and fifth larval instars were 8.61±0.12, 13.11±0.26, 20.13±0.30 and 29.14±0.30mm, r espectively. The length of pupa and adult was 16.44±0.37 and 14.3±0.32 mm respectively. The study concluded that cabbage was most preferable host of Spodoptera litura and developmental period increased on cabbage as compared to maize.
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