Articles

PHYTOTOXICITY TO KIWIFRUIT FROM SPRAYS OF MINERAL OIL

Article number
444_119
Pages
779 – 784
Language
Abstract
Mineral oil sprays applied to kiwifruit can cause two types of phytotoxic damage, black speckling on the fruit skin and premature fruit drop.
Field trials showed that kiwifruit has different periods of susceptibility to the two types of damage, and the risk of damage is affected by application practices.
Sprays of 1% oil applied between 14 and 44 days after fruit set caused speckling damage on the fruit.
When 2% oil was used the period of susceptibility was extended by 14 days and up to seven times more fruit were damaged.
Premature fruit drop occurred following sprays of oil applied more than 70 days after fruit set.
This type of damage could be increased by applying high concentrations of oil at high volumes.

Publication
Authors
C.E. McKenna, P.S. Stevens, D. Steven
Keywords
pest control, armored scale insects
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