Potential Yield Reduction of Sweet and Glutinous Corn Varieties Damaged by The Invasive Pest Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae): Field Trial Scale

Abstract

The aim of this study is to assess the extent of attack and the potential for decreased production of maize types in the field caused to Spodoptera frugiperda. This study was carried out on a large scale, with four treatments and six replications (10 systematic sample replications). Parameters observed include population development, attack rate, the potential for production decline. The results show that this pest attack began to be found in maize 2 weeks after planting (wap) with an average population of 5.37 individu on sweet corn and 6.53 individu on glutinous corn. Furthermore, the population continued to increase up to 5 wap and lowering again to 8 wap. The regression analysis revealed a positive relationship between the larval population and the S. frugiperda attack rate. Sweet corn production decreased by 28.08 percent and glutinous corn output decreased by 25.04 percent, respectively. Overall, our results showed that S. frugiperda attacks continued to increase in both maize varieties (glutinous and sweet), which was indicated by an increase in population and a decrease in production on a field trial scale.

Association of a Global Invasive Pest Spodoptera frugiperda (Lepidoptera: Noctuidae) with Local Parasitoids: Prospects for a New Approach in Selecting Biological Control Agents

“…Corn is also planted in the Kulonprogo and Gunung Kidul, but the corn in these areas is a fodder crop, while corn in Bantul is sweetcorn. Spodoptera frugiperda prefers sweet corn to fodder corn [ 49 ]. Meanwhile, sweet corn plants in Sleman are sprayed with pesticides more often, resulting in lower S. frugiperda populations in this region.…”

Association of a Global Invasive Pest <em>Spodoptera frugiperda</em> (Lepidoptera: Noctuidae) with the Local Parasitoids: Prospects for a New Approach in Biological Control

“…Corn is also planted in the Kulonprogo and Gunung Kidul, but the corn in these areas is a fodder crop, while corn in Bantul is sweet corn. Spodoptera frugiperda prefers sweet corn to fodder corn [50]. Meanwhile, sweet corn plants in Sleman are sprayed with pesticides more often, resulting in lower S. frugiperda populations in this region.…”

Preference, population development, and molecular characteristics of Spodoptera exigua (Lepidoptera: Noctuidae) on shallot cultivars: A field trial scale

“…Observation of larval populations was carried out using the same as the previous method from Sunari et al (2022), namely through a sampling of larvae using the U-shape method of 25 plants per sample point or 125 clumps per observation plot with an area of 2×1.5×20 m (Figure 1). Observations of the larvae population were carried out every week, starting the 2nd week after planting until 2 weeks before harvesting.…”