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为有效保护园林绿地中的自然天敌,以园林植物刺吸害虫及其天敌为调查对象,采用黄板诱集法,研究了园林绿地刺吸害虫及其天敌时序动态及发生规律。结果表明:绿地中京枫多态毛蚜(Periphyllus diacerivorus)、栾多态毛蚜(P.koelreuteria)、居松长足大蚜(Cinara pinihabitans)和白皮松长足大蚜(C.bungeanae)的发生期早于桃粉大尾蚜(Hyalopterus arundimis),且5种蚜虫种群均在夏季高温和天敌共同作用下崩溃;瓢虫和寄生蜂类天敌对碧桃(Pruns perscial f.duplex)上桃粉大尾蚜及捕食螨对碧桃上山楂叶螨(Tetranychus viennensis)的跟随效应明显,而天敌对其它4种植物上蚜虫无明显跟随效应;施药虽可暂时降低阔叶植物上3种蚜虫的种群数量,却大量杀伤了害虫的天敌,停药后3种蚜虫仍爆发成灾,同时使6月后碧桃上山楂叶螨种群爆发和5月中旬后油松(Pinus tabuliformis)上针叶小爪螨(Oligonychus ununguis)种群数量较多。绿地中瓢虫、草蛉、食蚜蝇和寄生蜂类天敌的发生最高峰均位于5月下旬至6月下旬,除草蛉外,绿地中的瓢虫、食蚜蝇和寄生蜂类天敌在7—8月种群数量均极低。草蛉喜欢在五角枫(Acer mono)上栖息或搜寻寄主。
In order to effectively protect the natural enemies in the garden green space, taking the garden plants to suck the pests and their natural enemies as the investigation object, the temporal dynamics and occurrence rules of the sucking insects and their natural enemies in the garden green space were studied by using the yellow board trapping method. The results showed that the occurrence period of Periphyllus diacerivorus, P. kelreuteria, Cinara pinihabitans and C. bungeanae in the green land earlier than And Hyalopterus arundimis, and all the five kinds of aphids crashed under the action of summer heat and natural enemies. The natural enemies of ladybugs and parasitoid were sensitive to pests and prey on peach aphids in Pruns perscial f. Tetranychus viennensis was followed by mites, while natural enemies had no obvious following effect on the aphids in the other four plants. Although the application of pesticides could temporarily reduce the population of three kinds of aphids on broadleaf plants, The natural enemies of pests, three kinds of aphids still outbreaks after the outbreak of disastrous, while in June after the Hawthorn spider mite populations on the outbreak and in mid-May on Pinus tabuliformis (Pinus tabuliformis) Needle mites (Oligonychus ununguis) population A large number. The highest occurrences of ladybugs, weeds, hoverflies and parasitoids in the green areas are all from late May to late June. In addition to the weeds, ladybirds, hoverflies and parasitoids in natural habitats were found in 7 August population is extremely low. Grass hips like to perch on the Acer mono or search for hosts.