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Predation of nymphal tomato potato psyllid, Bactericera cockerelli (Šulc) (Hemiptera: Triozidae), by the predatory mite, Anystis baccarum L. (Trombidiformes: Anystidae)
New Zealand Entomologist ( IF 0.3 ) Pub Date : 2016-07-02 , DOI: 10.1080/00779962.2016.1218525 I. J. Geary 1, 2, 3 , C. N. Merfield 4 , R. J. Hale 1, 5 , M. D. Shaw 6 , S. Hodge 1, 4
New Zealand Entomologist ( IF 0.3 ) Pub Date : 2016-07-02 , DOI: 10.1080/00779962.2016.1218525 I. J. Geary 1, 2, 3 , C. N. Merfield 4 , R. J. Hale 1, 5 , M. D. Shaw 6 , S. Hodge 1, 4
Affiliation
ABSTRACT This study investigated predatory behaviour of the mite Anystis baccarum on nymphs of the tomato potato psyllid Bactericera cockerelli. In 30-minute laboratory bioassays, predation rates per individual mite were low if late instar psyllid nymphs were ‘braced’ or ‘sealed’ tightly to a leaf, with only one nymph from twelve being successfully attacked and eaten in the presence of psyllid sugars (wax covered honeydew). However predation rates were approximately six times higher if the nymph was detached from the leaf and inverted. The presence of psyllid sugars had an impact on predation rates because mites would probe or investigate, and often feed from these sugars, sometimes leading to the immediate cessation of the mite’s investigation of the psyllid. Overall, the results of this investigation confirm that these mites consume late instar psyllid nymphs but may need to be at high densities before substantial reductions in psyllids occurred. The mites may be a more effective predator of psyllid eggs or younger instars and this predatory behaviour warrants further investigation.
中文翻译:
捕食性螨类 Anystis baccarum L. (Trombidiformes: Anystidae) 捕食若虫番茄马铃薯木虱 Bactericera cockerelli (Šulc)(半翅目:Triozidae)
摘要 本研究调查了螨Anystis baccarum 对番茄马铃薯木虱Bactericera cockerelli 若虫的捕食行为。在 30 分钟的实验室生物测定中,如果晚龄木虱若虫被“支撑”或“密封”在一片叶子上,每只螨虫的捕食率就会很低,12 只若虫中只有一个被成功攻击并在木虱糖存在的情况下被吃掉。蜡覆盖的蜜露)。然而,如果若虫从叶子上分离并倒转,捕食率大约高六倍。木虱糖的存在对捕食率有影响,因为螨虫会探查或调查,并经常以这些糖为食,有时会导致螨虫对木虱的调查立即停止。全面的,这项调查的结果证实,这些螨虫消耗晚龄木虱若虫,但可能需要在木虱大量减少之前达到高密度。螨虫可能是木虱卵或更年轻幼虫的更有效捕食者,这种捕食行为值得进一步调查。
更新日期:2016-07-02
中文翻译:
捕食性螨类 Anystis baccarum L. (Trombidiformes: Anystidae) 捕食若虫番茄马铃薯木虱 Bactericera cockerelli (Šulc)(半翅目:Triozidae)
摘要 本研究调查了螨Anystis baccarum 对番茄马铃薯木虱Bactericera cockerelli 若虫的捕食行为。在 30 分钟的实验室生物测定中,如果晚龄木虱若虫被“支撑”或“密封”在一片叶子上,每只螨虫的捕食率就会很低,12 只若虫中只有一个被成功攻击并在木虱糖存在的情况下被吃掉。蜡覆盖的蜜露)。然而,如果若虫从叶子上分离并倒转,捕食率大约高六倍。木虱糖的存在对捕食率有影响,因为螨虫会探查或调查,并经常以这些糖为食,有时会导致螨虫对木虱的调查立即停止。全面的,这项调查的结果证实,这些螨虫消耗晚龄木虱若虫,但可能需要在木虱大量减少之前达到高密度。螨虫可能是木虱卵或更年轻幼虫的更有效捕食者,这种捕食行为值得进一步调查。