Phytoparasitica (2001) 29, p. S61 (Collins et al.)

P.J. Collins and G.J. Daglish (2001)
Combating the evolution of strong resistance to phosphine in Australia
Phytoparasitica 29 (Suppl.), S61-S61
International Conference on Controlled Atmosphere and Fumigation in Stored Products (Session 1), October 29-November 3, 2000, Fresno, California, USA (not presented at Conference)
Abstract: After about 20 years of heavy dependence on grain protectants, the Australian grain industry is now relying almost exclusively on PH₃ to meet the demands of international and domestic markets for insect-free grain. Weak resistance to PH₃ evolved rapidly in most insect species with frequent occurrences in the last 10 years, particularly in certain species. In 1997 a new, strong resistance was detected in Rhyzopertha dominica. Although weak resistance was of little economic significance, the strongly resistant phenotypes could not be controlled by most of the registered concentration x time protocols. Strategies to combat strong resistance are being developed. The immediate response has been to develop new dosages to overcome the resistance and methods to destroy resistant insect populations. Studies in molecular and population genetics are being used to develop better detection methods and strategies to delay further resistance development.
Database assignments for author(s): Patrick J. Collins

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Rhyzopertha dominica