Aphis gossypii Glover (Hemiptera: Aphididae) is among major arthropods causing significant damage to okra in the tropics. Resistant varieties could reduce aphid infestation and increase productivity. This study was carried out to identify aphid-resistant and high yielding okra accessions for management of the pest. Eleven farmers’ varieties and four aphid-resistant accessions from AVRDC were evaluated at its Nkolbisson station in Yaounde, Cameroon. Field screening was done to determine resistance to aphids, days to 50% anthesis and days to 50% commercial maturity. Aphid data was expressed as the area under infestation pressure curve and subjected to statistical analysis based on mean (m) and standard deviation (S.D.). Crop cycle and yield data were subjected to analysis of variance. Accession ‘VI033824’ was the most resistant to aphids (474 ± 41.9 per leaf) with yield 0.76 ± 0.26 t/ ha whereas the yield of the highly susceptible Babungo (1519.8 ± 0.0 aphids) was 1.33 ± 0.07 t/ha, 75.5% higher that the yield of the only resistant variety. Abelmoschus esculatus was less attacked (601.4 ± 60.0 aphids) by aphids than Abelmoschus caillei (826.0 ± 71.6 aphids; df = 1, 41; Pr {>Chi} = 0.037). The yield of A. caillei species were higher (1.26 ± 0.14 t/ha) than A. esculentus species (0.43 ± 0.08 t/ha; df = 1, 41; Pr {>Chi} = 0.0002). Hence, varieties with resistance, tolerance to aphids and earliness could be incorporated into integrated pest management of aphids and enhance productivity of okra.

中文翻译：

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秋葵（Abelmoschus spp.）在热带条件下对棉蚜 Aphis gossypii glover（半翅目：蚜科）的生产力和抗性

棉蚜（Aphis gossypii Glover）（半翅目：蚜科）是热带地区对秋葵造成重大损害的主要节肢动物之一。抗性品种可以减少蚜虫侵扰并提高生产力。进行这项研究是为了鉴定抗蚜虫和高产秋葵种质以管理害虫。来自 AVRDC 的 11 个农民品种和 4 个抗蚜虫种质在其位于喀麦隆雅温得的 Nkolbisson 站进行了评估。进行田间筛选以确定对蚜虫的抗性、开花到 50% 的天数和到 50% 商业成熟的天数。蚜虫数据表示为侵染压力曲线下的面积，并根据平均值 (m) 和标准偏差 (SD) 进行统计分析。作物周期和产量数据进行方差分析。登记号 'VI033824' 对蚜虫的抵抗力最强 (474 ± 41. 9 每叶），产量为 0.76 ± 0.26 吨/公顷，而高度敏感的 Babungo（1519.8 ± 0.0 只蚜虫）的产量为 1.33 ± 0.07 吨/公顷，比唯一抗性品种的产量高 75.5%。与 Abelmoschus caillei（826.0 ± 71.6 蚜虫；df = 1, 41；Pr {> Chi} = 0.037）相比，Abelmoschus esculatus 受到的蚜虫攻击较少（601.4 ± 60.0 蚜虫）。A. caillei 物种的产量（1.26 ± 0.14 t/ha）高于 A. esculentus 物种（0.43 ± 0.08 t/ha；df = 1, 41；Pr {>Chi} = 0.0002）。因此，具有抗蚜性、抗蚜性和早熟性的品种可以纳入蚜虫病虫害综合治理，提高秋葵的生产力。与 Abelmoschus caillei（826.0 ± 71.6 蚜虫；df = 1, 41；Pr {> Chi} = 0.037）相比，Abelmoschus esculatus 受到的蚜虫攻击较少（601.4 ± 60.0 蚜虫）。A. caillei 物种的产量（1.26 ± 0.14 t/ha）高于 A. esculentus 物种（0.43 ± 0.08 t/ha；df = 1, 41；Pr {>Chi} = 0.0002）。因此，具有抗蚜性、抗蚜性和早熟性的品种可以纳入蚜虫病虫害综合治理，提高秋葵的生产力。与 Abelmoschus caillei（826.0 ± 71.6 蚜虫；df = 1, 41；Pr {> Chi} = 0.037）相比，Abelmoschus esculatus 受到的蚜虫攻击较少（601.4 ± 60.0 蚜虫）。A. caillei 物种的产量（1.26 ± 0.14 t/ha）高于 A. esculentus 物种（0.43 ± 0.08 t/ha；df = 1, 41；Pr {>Chi} = 0.0002）。因此，具有抗蚜性、抗蚜性和早熟性的品种可以纳入蚜虫病虫害综合治理，提高秋葵的生产力。