The study on the temporal fluctuation of populations and damage caused by Leucinodes orbonalis on African eggplant (Solanum aethiopicum) fruits was carried out in the forest region of South Cameroon from June 11 to September 22, 2018. It consisted of incubations of the attacked fruits in the laboratory for the study of L. orbonalis abundances and the evaluation of the damage caused by the same pest directly in the field and during each harvest; followed by the correlations with abiotic factors. The results showed that out of 331 incubated fruits for 06 harvests and 02 seasons of study, the average number of adults / fruit of L. orbonalis varied significantly from one harvest to another (F (5, 325) = 27.038, p <0.001) with a peak of 4.37 ± 0.66 individuals / fruit (N= 2) at the 2nd harvest (in August), and season to season (F (1, 329) = 15.002, p <0.001) with a peak of 3.22 ± 0.48 individuals / fruit (N=31) during the short dry season. Damage on S. aethiopicum fruits varied significantly from one harvest to another (F (5, 325) = 27.038, p <0.001) with a peak of 13.05 ± 4.10% in the first week of harvest in August. This damage did not change from one season to another (p <0.659). Means weight, length and diameter of an incubated fruit varied significantly from one harvest to another (F (5, 325) = 5,893; F (5, 325) = 7.71 and F (5, 325) = 7.84; p <0.001 respectively). The highest means weight, length and diameter were obtained at the 2nd and 3rd harvest with average values of 36.15 ± 6.87g and 40.20 ± 4.40g for the mean weight; 4.03 ± 0.30cm and 3.86 ± 0.15cm for the mean length and 4.15 ± 0.34cm and 4.12 ± 0.20cm for the mean diameter. Study revealed that the mean number of L. orbonalis per fruit had a significant positive correlation with mean weight (r=0.39, p <0.01), mean length (r=0.40, p <0.001) and mean diameter (r=0.41, p <0.001) of attacked fruits and multiple regression equations of y=5.3302x+16.021, R2=0.8172; y=0.3103x+2.6544, R2=0.8194 and y=0.3684x+2.6037, R2=0.8664 of weight, length and diameter respectively. Field damage showed a positive and non-significant correlation with precipitation (r = 0.80, p <0.20) and a negative and non-significant correlation with mean temperature (r = -0.737, p <0.262) and mean relative humidity (r = -0.632, p <0.367). These results are of practical significance in designing appropriate strategies for L. orbonalis control in eggplant intercropping systems.
| Published in | American Journal of BioScience (Volume 11, Issue 3) |
| DOI | 10.11648/j.ajbio.20231103.13 |
| Page(s) | 71-81 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2023. Published by Science Publishing Group |
Leucinodes orbonalis, Seasonal Variation, Population, Damage, Correlation
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APA Style
Pierre Stephan Elono Azang, Cyril Romeo Heumou, Desiree Chantal Alene, Dounia, Leslie Carelle Mahanac Njiti, et al. (2023). Incidence and Populations Fluctuation of Leucinodes orbonalis Guen. 1854 (Pyralidae) on African Eggplant (Solanaceae) and Their Relationship with Abiotic Factors. American Journal of BioScience, 11(3), 71-81. https://doi.org/10.11648/j.ajbio.20231103.13
ACS Style
Pierre Stephan Elono Azang; Cyril Romeo Heumou; Desiree Chantal Alene; Dounia; Leslie Carelle Mahanac Njiti, et al. Incidence and Populations Fluctuation of Leucinodes orbonalis Guen. 1854 (Pyralidae) on African Eggplant (Solanaceae) and Their Relationship with Abiotic Factors. Am. J. BioScience 2023, 11(3), 71-81. doi: 10.11648/j.ajbio.20231103.13
AMA Style
Pierre Stephan Elono Azang, Cyril Romeo Heumou, Desiree Chantal Alene, Dounia, Leslie Carelle Mahanac Njiti, et al. Incidence and Populations Fluctuation of Leucinodes orbonalis Guen. 1854 (Pyralidae) on African Eggplant (Solanaceae) and Their Relationship with Abiotic Factors. Am J BioScience. 2023;11(3):71-81. doi: 10.11648/j.ajbio.20231103.13
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Download@article{10.11648/j.ajbio.20231103.13,
author = {Pierre Stephan Elono Azang and Cyril Romeo Heumou and Desiree Chantal Alene and Dounia and Leslie Carelle Mahanac Njiti and Pierre Ngassam and Joseph Lebel Tamesse and Champlain Djieto-Lordon},
title = {Incidence and Populations Fluctuation of Leucinodes orbonalis Guen. 1854 (Pyralidae) on African Eggplant (Solanaceae) and Their Relationship with Abiotic Factors},
journal = {American Journal of BioScience},
volume = {11},
number = {3},
pages = {71-81},
doi = {10.11648/j.ajbio.20231103.13},
url = {https://doi.org/10.11648/j.ajbio.20231103.13},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajbio.20231103.13},
abstract = {The study on the temporal fluctuation of populations and damage caused by Leucinodes orbonalis on African eggplant (Solanum aethiopicum) fruits was carried out in the forest region of South Cameroon from June 11 to September 22, 2018. It consisted of incubations of the attacked fruits in the laboratory for the study of L. orbonalis abundances and the evaluation of the damage caused by the same pest directly in the field and during each harvest; followed by the correlations with abiotic factors. The results showed that out of 331 incubated fruits for 06 harvests and 02 seasons of study, the average number of adults / fruit of L. orbonalis varied significantly from one harvest to another (F (5, 325) = 27.038, p p S. aethiopicum fruits varied significantly from one harvest to another (F (5, 325) = 27.038, p p p L. orbonalis per fruit had a significant positive correlation with mean weight (r=0.39, p p p 2=0.8172; y=0.3103x+2.6544, R2=0.8194 and y=0.3684x+2.6037, R2=0.8664 of weight, length and diameter respectively. Field damage showed a positive and non-significant correlation with precipitation (r = 0.80, p p p L. orbonalis control in eggplant intercropping systems.},
year = {2023}
}
TY - JOUR T1 - Incidence and Populations Fluctuation of Leucinodes orbonalis Guen. 1854 (Pyralidae) on African Eggplant (Solanaceae) and Their Relationship with Abiotic Factors AU - Pierre Stephan Elono Azang AU - Cyril Romeo Heumou AU - Desiree Chantal Alene AU - Dounia AU - Leslie Carelle Mahanac Njiti AU - Pierre Ngassam AU - Joseph Lebel Tamesse AU - Champlain Djieto-Lordon Y1 - 2023/07/06 PY - 2023 N1 - https://doi.org/10.11648/j.ajbio.20231103.13 DO - 10.11648/j.ajbio.20231103.13 T2 - American Journal of BioScience JF - American Journal of BioScience JO - American Journal of BioScience SP - 71 EP - 81 PB - Science Publishing Group SN - 2330-0167 UR - https://doi.org/10.11648/j.ajbio.20231103.13 AB - The study on the temporal fluctuation of populations and damage caused by Leucinodes orbonalis on African eggplant (Solanum aethiopicum) fruits was carried out in the forest region of South Cameroon from June 11 to September 22, 2018. It consisted of incubations of the attacked fruits in the laboratory for the study of L. orbonalis abundances and the evaluation of the damage caused by the same pest directly in the field and during each harvest; followed by the correlations with abiotic factors. The results showed that out of 331 incubated fruits for 06 harvests and 02 seasons of study, the average number of adults / fruit of L. orbonalis varied significantly from one harvest to another (F (5, 325) = 27.038, p p S. aethiopicum fruits varied significantly from one harvest to another (F (5, 325) = 27.038, p p p L. orbonalis per fruit had a significant positive correlation with mean weight (r=0.39, p p p 2=0.8172; y=0.3103x+2.6544, R2=0.8194 and y=0.3684x+2.6037, R2=0.8664 of weight, length and diameter respectively. Field damage showed a positive and non-significant correlation with precipitation (r = 0.80, p p p L. orbonalis control in eggplant intercropping systems. VL - 11 IS - 3 ER -
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