Abstract We used electropenetrography to quantify and compare counts and durations of selected waveforms, produced by adult females of the stink bug Dichelops furcatus (F.). Insects fed on immature soybean pods and immature seed heads of four spring cereals: wheat, black oat, barley, and rye. On all foods, bugs spent over 60% of their plant access time in non-probing activities.This total waveform duration was significantly longer on barley and rye compared to those on soybean and oat; wheat was intermediate. Considering only probing activities, bugs spent longer durations (ca. 2×), on soybean and oat compared to barley, rye, and wheat plants. Bugs produced significantly more pathway events on soybean and rye than on wheat and barley; with a significantly shorter duration per event on rye.The counts and durations of xylem ingestion did not differ among foods. Cell rupturing activities on seeds were longer on soybean (ca. 23%) and oat (ca. 21%), than on barley and rye (ca. 6%).The durations of ingestion events on seeds were significantly shorter on soybean (over 3×) compared to those on barley and wheat; oat and rye were intermediate. However, the ingestion duration per insect did not show significant difference among foods. Results demonstrated that D. furcatus spent more time overall in probing activities on soybean and oat; whereas, rye and barley presented the worst feeding behavior.This study provides important background information for further quantitative studies of stink bugs on different plants, such as development of resistant host plants.

中文翻译：

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分叉齿龟（半翅目：异翅目：蝽科）对大豆和春粮取食行为的电穿透比较


摘要 我们使用渗透电图术来量化和比较由成年雌性分叉蝽 (F.) 产生的选定波形的计数和持续时间。昆虫以未成熟的豆荚和四种春季谷物的未成熟籽粒为食：小麦、黑燕麦、大麦和黑麦。对于所有食物，昆虫将超过 60% 的植物接触时间用于非探测活动。与大豆和燕麦相比，大麦和黑麦的总波形持续时间明显更长；小麦处于中等水平。仅考虑探测活动，与大麦、黑麦和小麦植物相比，昆虫在大豆和燕麦上花费的持续时间更长（约 2 倍）。与小麦和大麦相比，昆虫在大豆和黑麦上产生的途径事件明显更多；黑麦每次事件的持续时间明显较短。木质部摄入的数量和持续时间在食物之间没有差异。大豆（约 23%）和燕麦（约 21%）种子上的细胞破裂活性比大麦和黑麦（约 6%）更长。大豆（约 6%）种子上的摄入事件持续时间明显较短（超过3×) 与大麦和小麦相比；燕麦和黑麦处于中间。然而，每种昆虫的摄入持续时间在食物之间没有显示出显着差异。结果表明，分叉毛蝽在大豆和燕麦上的探测活动总体上花费了更多的时间；而黑麦和大麦的取食行为最差。本研究为进一步定量研究不同植物上的椿象，例如抗性寄主植物的发育，提供了重要的背景信息。