The cotton aphid, Aphis gossypii Glov. (Hemiptera: Aphididae), is a major insect pest on a wide range of plants that causes high damage and transmits plant viruses. This study was carried out to evaluate an indigenous isolate, Beauveria bassiana (Bb), and extracts of 5 plant species: Psiadia penninervia, Pulicaria crispa, Euryops arabicus, Salvia officinalis, and Ochradenus baccatus against A. gossypii, as individual and combined treatments to estimate their compatibility under laboratory conditions. Also, the antifungal activity of these plant extracts against B. bassiana was evaluated. LC50 value was 8.64 × 104 spores/ml of Bb against A. gossypii, while LC50 values of the tested 5 plant extracts on A. gossypii were 103.64, 879.92, 747.90, 783.28, and 262.42 μg/ml for P. penninervia, P. crispa, E. arabicus, S. officinalis, and O. baccatus, respectively. Both P. penninervia and O. baccatus extracts had the highest antifungal activities against Bb and were significantly different from the other 3 plant extracts. After 24 h of treatment with the combination of Bb and each extract, no effect for these combinations on A. gossypii mortality was recorded. Meanwhile, 5 days after treatment, the combined treatments between Bb and each plant extract achieved a significant increase in mortality than that of the single treatment with Bb or plant extract, except for P. penninervia extract, which did not achieve a significant mortality increase when combined with B. bassiana than that of its single treatment. P. penninervia extract was not compatible with B. bassiana, but the other tested 4 plant extracts were compatible with B. bassiana. These 4 plant extracts could be used to control aphids in combinations with B. bassiana. Further laboratory and field investigations are needed to examine the effects of these plant extracts on other insect pests or associated beneficial insects.

中文翻译：

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五种植物提取物与本土球孢白僵菌对棉蚜的相容性的适用性。（半翅目：蚜科）

棉蚜Aphis gossypii Glov。（半翅目：蚜科），是对多种植物的主要害虫，其引起高伤害并传播植物病毒。这项研究的目的是评估一种针对棉衣曲霉的本地分离株，球孢白僵菌（Bb）和5种植物提取物：Psiadia penninervia，Pulicaria crispa，Euryops arabicus，Salvia officinalis和Ochradenus baccatus。评估它们在实验室条件下的兼容性。此外，评估了这些植物提取物对球孢杆菌的抗真菌活性。棉铃虫的LC50值为8.64×104孢子/毫升Bb，而测试的5种植物提取物在棉铃虫上的LC50值为103.64、879.92、747.90、783.28和262.42μg/ ml。 crispa，E。arabicus，S。officinalis和O. baccatus，分别。P. penninervia和O. baccatus提取物对Bb的抗真菌活性最高，并且与其他3种植物提取物明显不同。用Bb和每种提取物的组合治疗24小时后，没有记录到这些组合对棉铃虫死亡率的影响。同时，处理后5天，Bb和每种植物提取物的联合处理比单用Bb或植物提取物处理的死亡率显着增加，但P. penninervia提取物在处理后没有显着增加死亡率。与球孢白僵菌联合使用比对其单一处理要好。P. penninervia提取物与球孢白僵菌不相容，但是其他测试的4种植物提取物与B. bassiana相容。这4种植物提取物可用于与B. bassiana结合防治蚜虫。需要进一步的实验室和田野调查，以检查这些植物提取物对其他害虫或相关有益昆虫的影响。