Spring and autumn nitrogen effects on susceptibility of low‐endophyte ‘Grasslands Nui’ ryegrass to damage by Argentine stem weevil larvae
Year: 1988
Type: article
Abstract: The probability of a low‐endophyte perennialryegrass tiller being damaged by Argentine stem weevil (ASW) ( Listronotus bonariensis (Kuschel)) larvae was investigated for different insecticide and nitrogen (N) fertiliser treatments. Damage of tagged tillers by ASW was recorded every 3 – 4 days from October to May in 1984/85 and 1985/86 from combinations of treatments with and without insecticide, and with and without N fertiliser applied in spring and autumn. Damage by ASW was reduced by a third but not eliminated with insecticide treatment. N applied in spring resulted in increased damage to tagged tillers by ASW and reduced ryegrass content of the sward. N applied in autumn had no effect on damage by ASW but increased the ryegrass content of the sward. It is recommended that N be applied to low‐endophyte ryegrass swards in autumn to enhance recovery from damage by ASW, but that N be withheld during spring.
Authors: W. F. Hunt, J. J. Dymock, D. L. Gaynor
Language: English
Domain: Life Sciences
SDGs: Zero hunger, Life on land
Open Access status: bronze
OpenAlex ID: W2023129352