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Publications by D.A. Costall
Biological Control of Ragwort Does Sheep Grazing Affect Ragwort Flea Beetle
New Zealand Plant Protection
Horticulture
Insect Science
Agronomy
Crop Science
Effect of Plant Condition on Oviposition by Ragwort Flea Beetle
New Zealand Plant Protection
Horticulture
Insect Science
Agronomy
Crop Science
Conditioning of Romney Sheep for Ragwort (Senecio Jacobaea) Control
Proceedings of the New Zealand Plant Protection Conference