Zadiprion

Rohwer, 1918

Species Guides

2

Zadiprion is a of in the Diprionidae (Hymenoptera) to Mexico. in this genus are specialized defoliators of pine needles (Pinus spp.), with some species causing severe in pine-oak forests. The genus includes at least four described species: Z. falsus, Z. howdeni, Z. llanderalae, and Z. rohweri. Females exhibit maternal care by remaining at oviposition sites to guard .

Zadiprion falsus by the Smithsonian. Used under a CC0 license.Zadiprion falsus by the Smithsonian. Used under a CC0 license.Zadiprion falsus by the Smithsonian. Used under a CC0 license.

Pronunciation

How to pronounce Zadiprion: //zəˈdɪpriˌɒn//

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Habitat

Pine-oak forests and oak forests in mountainous regions of Mexico, typically at elevations around 1,920 m. Associated with stands of Pinus including P. oaxacana, P. patula, P. leiophylla, P. teocote, and P. pseudostrobus.

Distribution

Mexico: recorded from multiple states including Oaxaca (Sierra Juárez/Sierra Norte: Ixtlán de Juárez, Santa Catarina Ixtepeji, Santiago Xiacui, Santa María Jaltianguis, Nuevo Zoquiapam, Pueblos Mancomunados), State of Mexico, and other regions where pines occur.

Diet

Larvae feed on needles of Pinus . Documented include Pinus oaxacana (principal host for Z. llanderalae), P. patula, P. leiophylla, P. edulis (for Z. rohweri), P. teocote, and P. pseudostrobus.

Host Associations

  • Pinus oaxacana - primary main for Z. llanderalae
  • Pinus patula -
  • Pinus leiophylla -
  • Pinus edulis - for Z. rohweri
  • Pinus teocote - recorded by other authors
  • Pinus pseudostrobus - recorded by other authors

Life Cycle

(one per year). active June–October; larvae present June–November; cocoons in soil/litter September–December. Larvae develop through multiple instars. Cocoons formed in soil or litter layer.

Behavior

Females exhibit maternal care by remaining at oviposition sites after laying on pine needles to guard them. Severe can cause extensive defoliation of trees.

Ecological Role

Defoliator of pine forests; can reach densities (e.g., 39.2 cocoons/m² reported for Z. llanderalae). Subject to natural by , particularly of Exenterus (Ichneumonidae), with rates reaching 50.1% of cocoons. Serves as for parasitoids.

Human Relevance

Economic pest of pine forests. Z. llanderalae caused severe affecting 12,194 hectares in Oaxaca by 2021. Management planning requires understanding of its and natural enemy complex.

Similar Taxa

  • NeodiprionBoth are diprionid that defoliate conifers; Zadiprion is restricted to Mexico while Neodiprion is primarily Nearctic
  • DiprionBoth are conifer-feeding diprionid ; Zadiprion females have distinct ovipositor and exhibit maternal care not reported in Diprion

Sources and further reading