Lambda Cyhalothrin Application Time and Weeding Regime on the Control of Fall Army Worm (Spodoptera frugiperda J.E. Smith) on Maize (Zea mays L.)

Ugiomoh, I.G, Ogazie, C.A, Akpan, B.F.

Abstract


The effect of lambda cyhalothrin 2.5 EC application time and weeding regime on the control of fall army worm (Spodoptera frugiperda J.E. SMITH) in maize (Zea mays L.) was conducted at Agricultural Research Farm, University of Port Harcourt. The study consists of 4 treatments with 3 replicates laid out in a completely randomized design (CRD). Insecticide lambda cyhalothrin 2.5 EC treatment was applied at the rate of 2 ml to 5L of water at different weeks after planting (WAP) and weeded once to thrice. The control experiment received insecticide treatment and no weeding. Data were collected on number of leaves, plant height, Fall Army Worm (FAW) infestation count per plot, weed density/m², fresh and dry weight of maize cob, fresh and dry weight of grains, grain weight, moisture content and maize yield. Results indicated that there was no significant difference (p>0.05) between the treatments for plant height and number of leaves. Weed density was significantly lower at 5 WAP and weeded thrice while moisture content was significantly higher in the control (p<0.05). Highest maize yield components such as cob weight (1520.0 g) per plot, grain weight (476.1 g) per plot and maize yield (4273.4 kg/ha) was higher at plots sprayed at 5 WAP and weeded thrice. Application of lambda cyhalothrin 2.5 EC at 5-WAP and weeding at 3, 5 and 7 WAP increased maize yield with the effective control of fall army worm and weeds in maize.


Keywords


Fall army worm, Insecticide, Weeding regime, Yield components, Zea mays

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