บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

The use of light paraffins to enhance the efficacy of chemical treatments for the control of lightbrown apple moth

P.D. Taverner and K. J. Powis

Australasian Postharvest Horticulture Conference, Adelaide, South Australia. 23-28 September 2001 (Oral presentation)

2001

บทคัดย่อ

The Use Of Light Paraffins To Enhance The Efficacy Of Chemical Treatments For The Control Of Lightbrown Apple Moth.

Interception of lightbrown apple moth (LBAM), Epiphyas postvittana Walker), on Australian citrus sent to the United States of America results in fumigation with methyl bromide. Alternative commodity treatments are required with the phasing out of ozonedepleting materials, such as methyl bromide. Previous work using ‘generally regarded as safe’ (GRAS) compounds as disinfestation treatments indicated that very high concentrations are usually required to control surface pests. Higher mortalities often occurred when these compounds were combined with adjuvants, such as non-ionic surfactants. In this study, we exposed LBAM larvae to a range of GRAS compounds either alone or in combination with Caltex Citrus Postharvest Dip (CPD), a light paraffin/surfactant mixture. The efficacy of the chemicals was determined against exposed LBAM larvae and when sheltered under an orange calyx. The results indicate that the addition of CPD to some chemicals greatly enhances their efficacy against exposed LBAM larvae. In some instances, chemicals without any apparent insecticidal properties alone, such as sodium hypochlorite (0.02%), sodium carbonate (2.0%) and sodium persulphate (2.0%), are highly efficacious when mixed with CPD. However, increased mortality could not be demonstrated against LBAM concealed under the calyx of an orange. The potential of chemical combinations for the surface disinfestation of low incidence pests, such as LBAM, is discussed.