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Host plants of LY vectors in Mexico
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Eder Ramos Hernández , Miguel Alberto Magaña Alejandro, Carlos Fredy
Ortiz García , Carlos Oropeza Salín , Julia María Lesher Gordillo &
Saúl Sánchez Soto (2018) The coconut pathosystem: weed hosts of nymphs
of the American palm Cixiid Haplaxius crudus (Hemiptera: Fulgoroidea) 
Journal of Natural History 52 () 5-6


Lethal yellowing (LY) of coconut palm (Cocos nucifera L., Arecaceae)
is a disease of economic importance that is caused by the phytoplasma
‘Candidatus Phytoplasma palmae’ and is transmitted by the planthopper
Haplaxius crudus (Van Duzee) (Hemiptera: Cixiidae). This study
explores the weeds used by H. crudus nymphs and other Cixiidae in a
coconut pathosystem in southern Mexico. Nymphs were collected directly
from the root system of each weed by hand or with the help of a vacuum
after carefully opening the culm. This study included 11 species of
weeds: nine Poaceae [Brachiaria decumbens Stapf, B. humidicola
(Rendle) Schweick, B. mutica (Forssk.) Stapf, Digitaria abyssinica
(Hochst. Ex A. Rich.) Stapf, Eustachys petraea (Sw.) Desv., Leersia
hexandra Sw., Panicum laxum Sw., P. maximum Jacq., Paspalum notatum
Flüggé]; one Cyperaceae [Cyperus ligularis L.], and one Portulacaceae:
[Portulaca pilosa L.]. Brachiaria mutica, E. petraea, B. humidicola,
P. maximum were identified as the principal host species for H. crudus
nymphs. Brachiaria decumbens, D. abyssinica, and C. ligularis are new
host records for the nymphs of H. crudus. Additionally, it was found
that H. crudus may coexist with its cogeners H. skarphion Kramer
(Cixiidae) and H. caldwelli Kramer (Cixiidae), on B. mutica. On C.
ligularis, H. crudus may coexist with Oecleus snowi Ball (Cixiidae)
nymphs. These results suggest that in the coconut pathosystem there is
a complex of multitrophic interactions that should be considered in
integrated management of LY.

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