A Reliable Method of Controlling Mite Eggs on Nursery Stocks Imported into New Zealand- an Evaluation of Phosphine and Ethyl Formate
B.B.C Page, Z. Zhang, H. Krishna and L. Jamieson
Program and Abstract. Australasian Postharvest Horticulture Conference. Royal Lakeside Novote., Rotorua, New Zealand. 27-30 September 2005. July 5-10, 2005. Page 51
2005
บทคัดย่อ
A Reliable Method of Controlling Mite Eggs on Nursery Stocks Imported into New Zealand- an Evaluation of Phosphine and Ethyl Formate
The importation of nursery stock into New Zealand poses a biosecurity risk front the introduction of unwanted quarantine arthropods like two-spotted spider mites (TSM) end their eggs. The most resistant insect life-stage to control is often eggs. We screened two fumigants, phosphine (PH3) and ethyl formate (EF), to eliminate the viability of a population of mixed-aged TSM eggs. The current treatments include the ozone-depleting fumigant methyl bromide (MB). There is an urgent need to reduce the use of MB due to its rising cost and global phase out. Our results suggest that the viability of TSM eggs can be completely deactivated when exposure to Pit, at t g/m' for minimum of 24 h at 15°C. For the rapid action fumigant EF, a concentration of 30 g/m3 for 6 h exposure at 20°C was sufficient to cause 100% mortality. Further research is needed to evaluate commercially available formulations, ECO2Fume® (2% PH3 in liquid CO2) and VAPORMATE® (16.7% EF in liquid CO2), on mites eggs in the presence of fresh produce and nursery stock Plant toleranceto PHs and HP will determine their widespread use as a replacement to current practice