Repositorio
Institucional

Bardehle, Leonardo

Chacon-Fuentes, Manuel

Martinez-Cisterna, Daniel

Reyes, Claudio

Vera, Waleska

Fincheira, Paola

Lizama, Marcelo

Quiroz, Andres

Infection of perennial ryegrass (Lolium perenne) by an endophyte fungus (Neotyphodium lolii) decreases the abundance and diversity of predators and parasitoids

SOC BRASILEIRA ENTOMOLOGIA

REVISTA BRASILEIRA DE ENTOMOLOGIA

en

Perennial ryegrass is one of the most important food sources in animal production. However, several pests affect this crop, and one of the primary control strategies is the symbiotic relationships between ryegrass endophyte fungi. This fungus produces alkaloids that exhibit toxic activity against arthropods. Furthermore, the effect of fungi may extend to higher trophic levels, including predators (spiders and/or insects), decreasing their abundance and diversity. Given the importance of spiders and insects as predators, whether the symbiotic interaction between perennial ryegrass and endophyte fungus reduces the abundance and diversity of predators pose an important question. To address this question, natural enemies in perennial ryegrass were collected and analyzed over a year, and the percentage of endophyte fungus was evaluated by the presence of hyphae from two ryegrass cultivars, Jumbo (E-) and Alto AR1 (E+). We observed an 80% endophyte infection rate for (E+) and 0% for (E-). Moreover, 222 individual spiders corresponding to 10 families were identified in both perennial ryegrasses, including 209 individuals for (E-) and 13 for (E+). The most abundant spider family was Lycosidae, representing 71.17% of the total spiders. In addition, 65 insects were collected, corresponding to 6 families, with Carabidae being the most abundant. Furthermore, the Simpson index indicated the dominance of the family Lycosidae. Overall, spider and insect abundance and diversity were reduced in (E+), suggesting a negative effect of the endophyte on predator populations.

2023

artículo original

10.1590/1806-9665-RBENT-2023-0012

PDF

Alto AR1 cultivar

Fungi

Plant interaction

Hyphae

Jumbo cultivar

Trophic levels

Entomología

Cultivar Alto AR1

Hongos

Interacción vegetal

hifas

Cultivar gigante

Niveles tróficos

artículo original

versión publicada

CC BY 4.0

CC BY 4.0

acceso abierto

acceso abierto

WOS:001094549400001

0085-5626

verde# dorado

Entomología

ANID FONDECYT 11130715

Universidad de La Frontera (UFRO) DI19-0 082