## 1 Introduction  
_Myzus persicae_ (Hemiptera: Aphididae) has a universal distribution, including Australia, and is considered a serious pest that has caused damage to hundreds of agricultural crops in more than 66 families [1, 2]. The aphid mainly exists in young plant tissues, causing reduced leaf size, delayed growth of the plant and reduced yield [3]. _M. persicae_ is considered a common pest insect of cruciferous crops, and sucks plant sap, leading to yellowing and curling of plant leaves. Additionally, the excretion of honeydew by aphids affects plant photosynthesis and encourages fungal growth [4]. Cabbage plants are commonly attacked by different species of aphids, such as turnip aphid _Lipaplis crysimi_, cabbage aphid _Breivocarphe brassicae_ and green peach aphid _M. persicae_, which economically damage these crops [5]. Chemical insecticides play a significant role in controlling insects on crop plants. insecticides have been extensively used in horticultural systems; however, they can cause the appearance of secondary pests instead of primary pests, pesticide resistance, contamination of environment and affect non-target organisms [6; 7]. Therefore, it is necessary to find alternative methods for pest management. In biological control, aphid parasitoids from families such as Braconidae and Aphelinidae are important and can cause a high percentage of mortality on aphids [8; 9]. Natural enemies of aphids can reduce the rate of population increase, and the use of wasp parasitoids in biological control of aphids has been successful [10]. Plants VOCs play an important role in plant-insect interactions by influencing insect communication and plant defense [11]. When sucking insect pests such as the green peach aphid feed on the plant, one response from the plant is to release odors in the form of VOCs. The VOCs have an important role in plant-insect interactions because they can be used by parasitoids to locate their host [12]. Cabbage plants attacked by aphids may emit volatile compounds that attract parasitoid wasps or predators [13; 14]. Previous studies have concluded that natural enemies can identify the VOCs released from the infested plants; the response of parasitoids and predators were confirmed and this provided an explanation how natural enemies were attracted by the host plant using the olfactory scale [15; 16]. _Aphidius colemani_ (Hymenoptera, Braconidae) and _Aphelinius abdominalis_ (Hymenoptera, Aphelinidae) are endoparasitoids of many species of aphids and both attack _M. perisecae_[17]. The VOCs released from infested _Brassica_ plants by aphids can bring with lure parasitoids, which showed the family of Brassicaceae possess chemical defense [18]. When the aphids feed on the plant leaves, the plant produces blends of volatiles as a response to the infestation by aphids, releases volatile compounds in different quantities and qualities from damaged Brassica plants, and these differences in the VOCs can attract other pests and natural enemies [17]. _A. colemani_ and _A. abdominalis_ are parasitic wasps specific to green peach aphids, whose females use VOC signals to detect and locate aphids feeding on host plants and lay their eggs into aphids [19; 20]. Additionally, honeydew excreted by aphids on plants could lead to the release of semiochemicals or VOCs attracting and guiding parasitoids to the aphid [21; 22]. In Y-tube olfactometer tests, [PERSON] [8] reported no attraction of the parasitoid _Diaeretiella rapae_ to the cabbage leaves. However, the choice of wasps to infest cabbage plants by _B. Brassica_ was more significant than other plants infested by different species of aphid, such as Russian wheat aphid _Diauraphis noxia_. These results indicate that the cabbage plant VOCs are more important than other plants in attracting the parasitoid to the aphid location [8]. The heavy population of _M. perisacae_ on the plant can accumulate wasps, while the uninfested plant sees few parasitoids come to the plant because wasps fail to locate the uninfested plant [23; 24].