Wollemia nobilis (Wollemi Pine) - Biosecurity New Zealand

Table 1.1: Approved insecticide treatments for surface feeding insects.
Active ingredient Treatment Specification
(Chemical Group)
2 Residue
Persistence 3
Acephate
Dip at room temperature for 2-5 minutes at 8 g a.i. per litre 3 days
(Organophosphorous) of dip. Treatment of non-dormant plant material only. (aerobic)
Carbaryl
Dip at room temperature for 2-5 minutes at 18 g a.i. per 6 days
(Carbamate)
litre of dip.
(aerobic)
Chlorpyrifos Dip at room temperature for 2-5 minutes at 10 g a.i. per 113 days*
(Organophosphorous) litre of dip. A non-ionic surfactant is required for dipping (aerobic)
Dimethoate
Dip at room temperature for 2-5 minutes at 1.1 g a.i. per 2 days
(Organophosphorous) litre of dip. Treatment of non-dormant plant material only. (aerobic)
Imidacloprid Dip at room temperature for 2-5 minutes at 3 g a.i. per litre 997 days*
(Neonicotinoid) of dip. Treatment of non-dormant plant material only. (aerobic)
Spinosad
Dip at room temperature for 2-5 minutes at 2 g a.i. per litre 17 days
(Spinosyns)
of dip.
(aerobic)
Tebufenozide Dip at room temperature for 2-5 minutes at 3 g a.i. per litre 405 days*
(Diacylhydrazine) of dip.
(aerobic)
* It is likely that these periods of residue persistence are not reflected as equivalent periods of
residual activity on the treated plants. These “worse case” figures have been listed in the
absence of information on the actual period of residual activity in-vivo.
A combination of pesticides from two different chemical groups (organophosphorous,
carbamate, neonicotinoid, spinosyns, or diacylhydrazine) should be applied to maximize the
efficacy and mitigate potential issues with insect resistance. The consignment of whole
plants or root-less cuttings should be spray treated 10-14 days after the initial treatment to
manage any potentially surviving insects or insect life stages that the treatments may have
failed to adequately treat. As mentioned above, care should be taken to ensure phytotoxicity
levels are acceptable before applying any chemical treatments to plant material.
1.4.4 Post-Entry Quarantine Requirements
The principle measure available for detecting and removing infested germplasm before the
consignment is released into New Zealand is through inspection while in post-entry
quarantine. Contamination of nursery plants by many pests and diseases may not become
apparent when conditions for the expression, such as humidity, temperature, and water levels,
are not suitable or the infected plants are symptom-less hosts. Based on the review of
treatments provided in Appendix 4 and the analysis of risk assessment of hazards provided in
chapters 4 to 12 of this document, the following post-entry quarantine conditions are
recommended to ensure as far as is possible that disease expression will become apparent on
infected plants that are not symptom-less hosts, and that the infecting pests and diseases will
remain contained within the quarantine facility:
o Post entry quarantine equivalent to Level 2 quarantine is considered appropriate, with the
following additional structural and management requirements:
2 The dip solution must be used with agitation according to the prescribed conditions and no more than twice or as per manufacturer's
recommendations.
3 Based on the aerobic soil half life (where provided, hydrolysis or anaerobic half life where not provided) provided by the PAN Pesticides
Database at http://www.pesticideinfo.org
Page 6 of 193 14 March 2008 Import Risk Analysis: Wollemia nobilis (Wollemi Pine) Araucariaceae Nursery Stock from Australia