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EFFECTIVENESS OF USED ENGINE OIL IN THE MANAGEMENT OF COCONUT MITE, ACERIA GUERRERONIS (ACARI: ERIOPHYIDAE)

Authors:

K. A. S. Chandrasiri ,

COCOS, LK
About K. A. S.
Coconut Research Institute, Lunuwila, Sri Lanka.
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L. C. P. Fernando

LK
About L. C. P.
Coconut Research Institute, Lunuwila, Sri Lanka.
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Abstract

The effectiveness of applying used engine oil on nuts in the management of
coconut mite, Aceria guerreronis Keifer (Acari: Eriophyidae) was
determined. The numbers of coconut mites were significantly lower on nuts
treated with 20%, 30% and 40% concentrations of used engine oil than that
of untreated nuts, at Udappuwa. The nuts treated with 30% mixture of used
engine oil were free from coconut mites until 60 days and negligible
thereafter indicating that it is the best concentration. Similar results were
obtained when the method was repeated at Anuradhapura. The predatory
mite, Neoseiulus aff. paspalivorus was drastically affected by the treatment.
A study conducted in three infested plantations at Udubaddawa, Mampury
and Anuradhapura indicated that the incidence of damage in treated palms
were significantly lower than in control palms. There were less than 3%
nuts with fresh damage in treated palms compared to over 50% damaged
nuts in control palms in all three locations. Similarly, percentage of nuts
with discontinued damage was considerably higher in treated palms than in
control palms. The percentage of nuts with no damage at harvest was
significantly higher in treated palms than in untreated palms irrespective of
location, pick and frequency of application. The percentage of damaged
nuts in the untreated newly developed bunches of treated palms were
significantly lower than that of untreated palms and this percentage
declined with time in all locations. The results indicate that the.application
of used engine oil at monthly intervals is the best frequency of application
that resulted in the highest percentage of nuts with no damage and the
lowest damage incidence on newly developed nuts as recorded at
Udubaddawa. Application of 30% used engine oil at 2-montly intervals is
recommended for the management of coconut mite. The advantages and
disadvantages of this method are discussed.
How to Cite: Chandrasiri, K.A.S. & Fernando, L.C.P., (2010). EFFECTIVENESS OF USED ENGINE OIL IN THE MANAGEMENT OF COCONUT MITE, ACERIA GUERRERONIS (ACARI: ERIOPHYIDAE). COCOS. 16, pp.43–55. DOI: http://doi.org/10.4038/cocos.v16i0.2196
Published on 12 Aug 2010.
Peer Reviewed

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