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Research Paper

Effects of fast and slow-wilting soybean genotypes on fall armyworm (Spodoptera frugiperda) growth and development

, , , , & ORCID Icon
Article: 2354421 | Received 06 Mar 2024, Accepted 03 May 2024, Published online: 19 May 2024

Figures & data

Figure 1. Soybean leaf with a 2nd instar FAW larvae enclosed in a mesh bag.

Figure 1. Soybean leaf with a 2nd instar FAW larvae enclosed in a mesh bag.

Figure 2. Damage assessment scale on soybean leaves. 0 = 0% damage, 1 = 25% damage, 2 = 50% damage, 3 = 75% damage, 4 = 100% damage.

Figure 2. Damage assessment scale on soybean leaves. 0 = 0% damage, 1 = 25% damage, 2 = 50% damage, 3 = 75% damage, 4 = 100% damage.

Figure 3. Feeding initiation study set up. From right to left: sampled leaves in falcon tubes, digital microscope, laptop, stopwatch, and discard bin.

Figure 3. Feeding initiation study set up. From right to left: sampled leaves in falcon tubes, digital microscope, laptop, stopwatch, and discard bin.

Figure 4. (A) mean mass gained by FAW when exposed to various soybean growth stages for 48 hours. Different letters denote significant differences in mean mass as determined by post hoc analysis using Tukey’s test (p=.001). (B) mean mass gained by FAW after larvae were exposed to either fast or slow wilting genotypes for 48 hours. Different letters denote significant differences in mean mass as determined by post hoc analysis using student t-test (p=.0110).

Figure 4. (A) mean mass gained by FAW when exposed to various soybean growth stages for 48 hours. Different letters denote significant differences in mean mass as determined by post hoc analysis using Tukey’s test (p=.001). (B) mean mass gained by FAW after larvae were exposed to either fast or slow wilting genotypes for 48 hours. Different letters denote significant differences in mean mass as determined by post hoc analysis using student t-test (p=.0110).

Figure 5. A) mean pupal mass after larvae were exposed to various soybean growth stages for 48 hours. Different letters denote significant differences in mean mass as determined by post hoc analysis using Tukey’s test (p=.001). B) mean pupal mass after larvae were exposed to either fast or slow wilting genotypes for 48 hours. Different letters denote significant differences in mean mass as determined by post hoc analysis using student t-test (p=.334).

Figure 5. A) mean pupal mass after larvae were exposed to various soybean growth stages for 48 hours. Different letters denote significant differences in mean mass as determined by post hoc analysis using Tukey’s test (p=.001). B) mean pupal mass after larvae were exposed to either fast or slow wilting genotypes for 48 hours. Different letters denote significant differences in mean mass as determined by post hoc analysis using student t-test (p=.334).

Figure 6. A) Mean adult mass after larvae were exposed to various soybean growth stages for 48 h. Let ‘NS’ denote that there are no significant differences in mean mass as determined by post hoc analysis using Tukey’s test (p=.216). B) Mean adult mass after larvae were exposed to either fast or slow wilting genotypes for 48 h. ‘NS’ denote that there are no significant differences in differences in mean mass as determined by post hoc analysis using student t-test (p=.563).

Figure 6. A) Mean adult mass after larvae were exposed to various soybean growth stages for 48 h. Let ‘NS’ denote that there are no significant differences in mean mass as determined by post hoc analysis using Tukey’s test (p=.216). B) Mean adult mass after larvae were exposed to either fast or slow wilting genotypes for 48 h. ‘NS’ denote that there are no significant differences in differences in mean mass as determined by post hoc analysis using student t-test (p=.563).

Figure 7. A) Mean mortality of FAW larvae across early, mid, and late soybean growth stages. Different letters denote significant differences in mean mortality across soybean growth stages as determined by post hoc analysis using Tukey’s test (p= .0001). B) Mean mortality of FAW across fast wilting genotypes and slow wilting genotypes. Different letters denote significant differences in mean mortality between fast and slow wilting soybean genotypes as determined by post hoc analysis using student t-test (p=.0360).

Figure 7. A) Mean mortality of FAW larvae across early, mid, and late soybean growth stages. Different letters denote significant differences in mean mortality across soybean growth stages as determined by post hoc analysis using Tukey’s test (p= .0001). B) Mean mortality of FAW across fast wilting genotypes and slow wilting genotypes. Different letters denote significant differences in mean mortality between fast and slow wilting soybean genotypes as determined by post hoc analysis using student t-test (p=.0360).

Figure 8. A) Mean damage assessment across early, mid, and late soybean growth stages. Different letters denote significant differences in mean damage inflicted across soybean growth stages as determined by post hoc analysis using Tukey’s test (p=.0781). B) Mean damage assessment of FAW across fast wilting genotypes and slow wilting genotypes. Let ‘NS’ denote that there are no significant differences in mean damage inflicted between fast and slow wilting soybean genotypes as determined by post hoc analysis using student t-test (p=.4755).

Figure 8. A) Mean damage assessment across early, mid, and late soybean growth stages. Different letters denote significant differences in mean damage inflicted across soybean growth stages as determined by post hoc analysis using Tukey’s test (p=.0781). B) Mean damage assessment of FAW across fast wilting genotypes and slow wilting genotypes. Let ‘NS’ denote that there are no significant differences in mean damage inflicted between fast and slow wilting soybean genotypes as determined by post hoc analysis using student t-test (p=.4755).

Figure 9. Mean plant height across different soybean growth stages (early, mid, late). Different letters denote significant differences in mean plant height as determined by post hoc analysis using Tukey’s test (p<.05). B) Mean plant height across fast wilting and slow wilting soybean genotypes. Different letters denote significant differences in mean plant height as determined by post hoc analysis using student t-test (p=.0001).

Figure 9. Mean plant height across different soybean growth stages (early, mid, late). Different letters denote significant differences in mean plant height as determined by post hoc analysis using Tukey’s test (p<.05). B) Mean plant height across fast wilting and slow wilting soybean genotypes. Different letters denote significant differences in mean plant height as determined by post hoc analysis using student t-test (p=.0001).

Figure 10. A) Mean number of leaves across different soybean growth stages (early, mid, late). Different letters denote significant differences in a mean number of leaves as determined by post hoc analysis using Tukey’s test (p=.0001). B) Mean number of leaves across fast and slow soybean genotypes. Different letters denote significant differences in a mean number of leaves as determined by post hoc analysis using a student t-test (p=.002).

Figure 10. A) Mean number of leaves across different soybean growth stages (early, mid, late). Different letters denote significant differences in a mean number of leaves as determined by post hoc analysis using Tukey’s test (p=.0001). B) Mean number of leaves across fast and slow soybean genotypes. Different letters denote significant differences in a mean number of leaves as determined by post hoc analysis using a student t-test (p=.002).

Figure 11. A) Mean number of trichomes on different soybean leaf sides (adaxial, abaxial). Different letters denote significant differences in a mean number of leaves as determined by post hoc analysis using a student t-test (p=.0001). B) Mean number of trichomes across fast and slow soybean genotypes. Different letters denote significant differences in a mean number of leaves as determined by post hoc analysis using a student t-test (p=.0025).

Figure 11. A) Mean number of trichomes on different soybean leaf sides (adaxial, abaxial). Different letters denote significant differences in a mean number of leaves as determined by post hoc analysis using a student t-test (p=.0001). B) Mean number of trichomes across fast and slow soybean genotypes. Different letters denote significant differences in a mean number of leaves as determined by post hoc analysis using a student t-test (p=.0025).

Figure 12. A) Mean number of seconds it took FAW larvae of different instars to begin feeding on soybean leaves (early, late). Different letters denote significant differences in mean number of leaves as determined by post hoc analysis using a student t-test (p=.0001). B) Mean number of seconds it took FAW larvae to begin feeding on fast and slow soybean genotypes. Let ‘NS’ denote that there are no significant differences in the mean it took FAW larvae to begin feeding using the student t-test (p=.1780).

Figure 12. A) Mean number of seconds it took FAW larvae of different instars to begin feeding on soybean leaves (early, late). Different letters denote significant differences in mean number of leaves as determined by post hoc analysis using a student t-test (p=.0001). B) Mean number of seconds it took FAW larvae to begin feeding on fast and slow soybean genotypes. Let ‘NS’ denote that there are no significant differences in the mean it took FAW larvae to begin feeding using the student t-test (p=.1780).

Figure 13. Percentage of FAW larvae refused to feed on fast and slow soybean genotypes. Letter ‘NS’ denote that there are no significant differences. It took FAW larvae to begin feeding using a student t-test (p=.5330).

Figure 13. Percentage of FAW larvae refused to feed on fast and slow soybean genotypes. Letter ‘NS’ denote that there are no significant differences. It took FAW larvae to begin feeding using a student t-test (p=.5330).

Figure 14. Mean number of pods on fast and slow wilting soybean genotypes. Different letters denote significant differences in the mean number of pods found on soybean plants using a student t-test (p=.0001).

Figure 14. Mean number of pods on fast and slow wilting soybean genotypes. Different letters denote significant differences in the mean number of pods found on soybean plants using a student t-test (p=.0001).

Data availability statement

All data will be made available on request.