The White Peach Scale (WPS), Pseudaulacaspis pentagona (Hemiptera: Diaspididae) is one of the most damaging armored scale insects as it is a pest of various crops, including ornamental plants and fruit trees. In France, P. pentagona has become one of the main threats towards blackcurrants (Ribes nigrum L.), especially in Burgundy, the Loire Valley and the Rhône-Alpes where the cultivation of blackcurrants is not only an emblematic and cultural activity but also has economic importance. We determined the direct effect of blackcurrant varieties on the infestation rate, female body size, and parasitism rate of P. pentagona. Our study was conducted in a Burgundy (France) natural population of P. pentagona developing on two blackcurrant varieties ‘Noir de Bourgogne’ and ‘Royal de Naples’. This field study showed that WPS females feeding on ‘Noir de Bourgogne’ were more numerous, had a larger body, a larger shield, and were less parasitized compared to females feeding on ‘Royal de Naples’ at the same site. However, the high scale density and the low parasitism rate found overall on both varieties brings into question the benefits of a pest management strategy based on the change of the varieties used in blackcurrant orchards.

中文翻译：

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黑加仑果园中的寄主植物变种影响了白桃鳞片（Pseudaulacaspis pentagona（Targ。）（半翅目：Dia科）。

白桃鳞（WPS），Pseudaulacaspis pentagona（半翅目：Diaspididae）是最具破坏性的装甲鳞虫之一，因为它是多种农作物的害虫，包括观赏植物和果树。在法国，彭塔戈纳疟原虫已成为对黑醋栗（Ribes nigrum L.）的主要威胁之一，尤其是在勃艮第，卢瓦尔河谷和罗纳-阿尔卑斯大区，那里种植黑醋栗不仅是象征性的文化活动，而且还具有经济重要性。我们确定了黑加仑品种对P. pentagona的侵染率，雌性体形和寄生率的直接影响。我们的研究是在勃艮第（法国）的彭塔哥纳（P. pentagona）自然种群中进行的，该种群在两个黑加仑品种'Noir de Bourgogne'和'Royal de Naples'上发育。这项野外研究表明，与在同一地点以“皇家那不勒斯”为食的雌性相比，以“黑布尔戈涅”为食的WPS雌性数量更多，身体更大，盾牌更大，并且被更少的寄生。但是，两个品种总体上发现的高密度密度和低寄生率，使人们怀疑基于黑加仑果园中品种变化的有害生物管理策略的优势。