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Pasture seed samples that were harvested around 1917 in New Zealand were analysed for purity,  Epichloë  endophyte and insects. Samples consisted of 13 packets of seed varying from 2.2 to 15.0 g and comprising, Chewings fescue ( Festuca rubra  L.), cocksfoot ( Dactylis glomerata  L.), oat ( Avena sativa  L.), perennial ryegrass ( Lolium perenne  L.) and red clover ( Trifolium pratense  L.). These findings show that in the period prior to modern seed testing laboratories only four of the 13 samples (31%) could possibly have met today’s seed certification standards as it relates to seed purity. When compared with published purities and weed content of seed of the era these samples appear typical. Endophyte testing on the four ryegrass seed samples and the ryegrass contaminants found in the Chewings fescue and cocksfoot samples showed sample-to-sample variation in endophyte infection from nil to 91%. One cocksfoot sample, most likely harvested from the Banks Peninsula, contained an Argentine stem weevil. Subsequent checking of entomological collection records also revealed specimens being present in the Wellington region from 1916. Together these occurrences precede the earliest published record for the species in New Zealand by ten years and suggest that it may have been widespread at that time.

new zealand journal of agricultural research

Analytical purity of old New Zealand forage seed samples and detection of fungal and insect contaminants including ryegrass endophyte and Argentine stem weevil