中黑盲蝽在几种寄主植物上取食行为的比较研究

【目的】明确中黑盲蝽在主要寄主植物上的取食刺探行为，为评价寄主抗虫性和寄主选择习性提供方法和依据。【方法】通过EPG技术研究中黑盲蝽在菜豆、苜蓿、甘蓝和小麦以及棉花的生长点、子叶、真叶等器官上的取食特征。【结果】 中黑盲蝽在各寄主上的刺探电位波形由Ⅰ波、Ⅱ波、Ⅲ波和Ⅳ波4部分组成。Ⅰ波表示口针的刺入；Ⅱ波表示口针在撕裂植物组织和细胞，并向外分泌唾液；Ⅲ波表示取食；Ⅳ波表示口针的拔出。中黑盲蝽取食苜蓿和棉花生长点的每次刺探时间、每次刺探中的Ⅲ波时间均显著长于其它测试植物或器官。【结论】发现并定义了中黑盲蝽的四类刺探波（Ⅰ波、Ⅱ波、Ⅲ波、Ⅳ波）。通过比较EPG参数，发现在几种测试植物中，中黑盲蝽喜欢取食苜蓿，而在棉花植株上喜欢取食生长点。

Electrical Penetration Graphs of Adelphocoris suturalis Jakovlev in Main Host Crops

Abstract: Objective] Probing graphs of Adelphocoris suturalis were investigated in the laboratory for understanding feeding behaviors of the insect on different host plants. Method] The probing waveforms of A. suturalis on green bean, alfalfa, cauliflower, wheat and cotton were analyzed with DC-EPG.. Result] The probing waveforms of the insect on five hosts consist of four parts, Ⅰrepresents stylet thrusting into plant tissue; Ⅱ represents multiple-cell laceration and salivation; Ⅲ represents ingestion; Ⅳ represents withdrawal of stylet from the plant tissue. The probe duration and Ⅲduration per probe by A. suturalis on alfalfa were significantly longer than other hosts, while the insect much preferred the growing point than other structures (cotyledon and leaf). Conclusion] The probing waveforms of A. suturalis are defined by this experiment, which can be used for evaluating resistance of host to A. suturalis. Alfalfa and growing point of cotton in this test are the best foods the insect preferred.