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Measuring wood‐boring depth of Arhopalus ferus and Prionoplus reticularis in Pinus radiata logs informs the development of phytosanitary treatments
Author(s) -
Romo C.M.,
Bader M.K.F.,
Pawson S.M.
Publication year - 2018
Publication title -
entomologia experimentalis et applicata
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.765
H-Index - 83
eISSN - 1570-7458
pISSN - 0013-8703
DOI - 10.1111/eea.12710
Subject(s) - phytosanitary certification , pinus radiata , biology , quarantine , pest analysis , larva , radiata , toxicology , horticulture , botany , ecology , vigna
Phytosanitary treatments are applied to minimize the movement of forest insects when trading export logs and timber. Treatments must prove effective against quarantine pests. However, to date, phytosanitary treatment development rarely incorporates biological information about pest location within a commodity. Incorporating such knowledge may lead to improved treatment efficiency by targeting control at the specific location of pests. We assessed larval‐boring depth of A rhopalus ferus ( M ulsant) and P rionoplus reticularis ( W hite) ( C oleoptera: C erambycidae) over 5 months at a range of temperatures using P inus radiata D . D on ( P inaceae) logs. Five months extends beyond the maximum time between harvest and subsequent export of logs from New Zealand. Logs (22 cm diameter, 50 cm long) were manually infested with neonate larvae and destructively sampled every 4 weeks. Boring depths differed significantly between species and their rates of boring (penetration) into the sapwood were temperature dependent. At the highest temperature (24/16 °C, day/night), mean larval boring depths after 5 months by A . ferus and P . reticularis were 27.7 mm (95% confidence interval: 22.4–32.4) and 9.4 mm (6.9–12.0), respectively. Maximum larval boring depths of A . ferus and P . reticularis after 5 months occurred at 21/12 °C (day/night) and were 53.7 mm (33.8–69.4) and 21.8 mm (16.6–27.0), respectively. Information on boring depth can inform trials to assess the efficacy of new phytosanitary treatments. Knowledge of the location of potential pest species ensures that proposed treatment schedules are effective at treating infested portions of export logs.