Eulachnus tuberculostemmatus (Hemiptera: Aphididae) is the most abundant aphid species attacking pine trees in Isfahan, Iran. Population fluctuations of this species and its natural enemies were studied on Pinus brutia var. eldarica by weekly sampling. Its fertility‐life table parameters were determined in the field in spring and summer 2016. Furthermore, effects of different temperatures (15, 20, 25, and 30 °C) and irrigation regimens (well irrigated, moderately and highly drought‐stressed) on its performance were investigated in the laboratory. The aphid population reached its peak abundance between 11 April and 23 May. Also, a minor peak was observed between mid‐November and mid‐December. During the survey, no sexual morphs were observed. Most fertility‐life table parameters of E. tuberculostemmatus were found to be significantly higher in spring than in summer. Aphids reared at 20 and 25 °C had a significantly higher net reproductive rate, intrinsic rate of increase and finite capacity for increase compared to those reared at 15 and 30 °C. Also, the aphid performed significantly better on highly drought‐stressed trees, due to higher survival rate, female adult longevity and fecundity. Population peaks of the four Coccinellidae predators Adalia bipunctata, Hippodamia variegata, Propylea quatuordecimpunctata and Coccinella septempunctata coincided with that of the aphid.

中文翻译：

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松蚜、Eulachnus tuberculostemmatus（半翅目：蚜科）的生物学和生态学及其对环境变化的人口响应

Eulachnus tuberculostemmatus（半翅目：蚜科）是攻击伊朗伊斯法罕松树的最丰富的蚜虫物种。对该物种及其天敌的种群波动进行了研究。eldarica 每周抽样。其生育寿命表参数是在 2016 年春季和夏季在田间测定的。此外，不同温度（15、20、25 和 30 °C）和灌溉方式（良好灌溉、中度和高度干旱胁迫）对在实验室中对其性能进行了研究。蚜虫种群在 4 月 11 日至 5 月 23 日之间达到了高峰。此外，在 11 月中旬和 12 月中旬之间观察到了一个小高峰。在调查期间，没有观察到性变体。E.的大多数生育寿命表参数。发现结核杆菌在春季明显高于夏季。与在 15 和 30 °C 下饲养的蚜虫相比，在 20 和 25 °C 下饲养的蚜虫具有显着更高的净繁殖率、内在增长率和有限的增长能力。此外，由于较高的存活率、雌性成虫寿命和繁殖力，蚜虫在高度干旱胁迫的树木上表现明显更好。瓢虫科的四种天敌 Adalia bipunctata、Hippodamia variegata、Propylea quatuordecimpunctata 和 Coccinella septempunctata 的种群峰值与蚜虫的种群峰值一致。由于较高的存活率、雌性成虫寿命和繁殖力，蚜虫在高度干旱胁迫的树木上表现明显更好。瓢虫科的四种天敌 Adalia bipunctata、Hippodamia variegata、Propylea quatuordecimpunctata 和 Coccinella septempunctata 的种群峰值与蚜虫的种群峰值一致。由于较高的存活率、雌性成虫寿命和繁殖力，蚜虫在高度干旱胁迫的树木上表现明显更好。瓢虫科的四种天敌 Adalia bipunctata、Hippodamia variegata、Propylea quatuordecimpunctata 和 Coccinella septempunctata 的种群峰值与蚜虫的种群峰值一致。