Universidade Federal de Pelotas - UFPel, Programa de Pós-graduação em Fitossanidade, Capão do Leão, RS, Brasil.
Empresa Brasileira de Pesquisa Agropecuária - Embrapa Cerrados, Brasília, DF, Brasil.
Braz J Biol. 2024 Oct 28;84:e286201. doi: 10.1590/1519-6984.286201. eCollection 2024.
Palpita forficifera Munroe, 1959 (Lepidoptera: Crambidae) is the main pest of the olive tree (Olea europaea L., Oleaceae) in Brazil and its management has been difficult, as there are few products recommended for its control. This study aimed to evaluate the population dynamics of P. forficifera and the entomofauna of parasitoid eggs and larvae in three olive orchards under different cultivation systems, in Rio Grande do Sul state, Brazil. The study was carried out from October to May, in the 2017/18 and 2018/19 harvests, in olive orchards of different cultivars in the municipalities of Pelotas and Rio Grande, state of Rio Grande do Sul, Brazil. Population dynamics of P. forficifera varied according to the agricultural season, the months sampled, and the orchards (sites) evaluated. The highest infestation reached around 60% of the shoots in some months, depending on the orchard evaluated. During the pest infestation period, the occurrence of the egg parasitoid Trichogramma foersteri Takahashi, 2021 (Hymenoptera: Trichogrammatidae) was observed along with three larval parasitoids belonging to the genera Dolichogenidea Viereck, 1911, Hymenochaonia Dalla Torre, 1898 (Hymenoptera: Braconidae) and Temelucha Förster, 1869 (Hymenoptera: Ichneumonidae). Temelucha hilux Gauld, 2000 is recorded for the first time in association with a host, and its distribution in the country is extended to the southern region, from Brazil. Due to the scarcity of information on pest management, the natural occurrence of natural enemies in crops is of paramount importance in helping to manage P. forficifera in the field. The population dynamics of P. forficifera is also influenced by the parasitoid community, made up of at least four species of parasitic Hymenoptera. Therefore, strategies aimed at managing P. forficifera must be well developed in order to maintain and increase natural biological control in the field.
棕污灯蛾 Munroe，1959（鳞翅目：螟蛾科）是巴西橄榄树（油橄榄，木樨科）的主要害虫，其管理一直很困难，因为控制它的产品很少。本研究旨在评估三种不同栽培系统下的棕污灯蛾种群动态和寄生性卵和幼虫的昆虫区系，在巴西南里奥格兰德州。研究于 2017/18 和 2018/19 收获季，从 10 月至 5 月在佩洛塔斯和里奥格兰德市的不同橄榄园进行。棕污灯蛾的种群动态随农业季节、采样月份和果园（地点）的不同而变化。在一些月份， depending on the orchard evaluated，最高的虫害率达到了 60%左右。在虫害期间，观察到卵寄生蜂 Trichogramma foersteri Takahashi，2021（膜翅目： Trichogrammatidae）的发生，以及三种幼虫寄生蜂，属于多丽蝇属、 hymenocchaonia Dalla Torre，1898（膜翅目： Braconidae）和 Temelucha Förster，1869（膜翅目： Ichneumonidae）。Temelucha hilux Gauld，2000 首次与宿主相关联，其在该国的分布范围扩大到南部地区，从巴西。由于缺乏害虫管理方面的信息，作物中自然发生的天敌在帮助管理田间棕污灯蛾方面至关重要。棕污灯蛾的种群动态也受到寄生性膜翅目昆虫至少四个物种的寄生性天敌群落的影响。因此，必须制定良好的管理棕污灯蛾的策略，以维持和增加田间自然生物控制。
