ISHS Acta Horticulturae 192: VIII International Symposium on Apricot Culture and Decline
CONTROL OF EUROPEAN RED MITE PANONYCHUS ULMI (KOCH) ON APRICOT IN CENTRAL OTAGO, NEW ZEALAND |
| Author: | G. F. McLaren |
| Abstract:
European red mite (P. ulmi) has been studied on apricot cv. Moorpark in Central Otago, New Zealand for ten years. A correlation has been established between mites feeding on the small fruit in October and marking of the fruit at harvest time. Damage is caused by the first generation of active mites which move onto the fruit from the overwintering egg sites on the wood. The time of egg hatch varies by at least 14 days from season to season. Population studies on leaf samples showed that mites do not survive as well on apricot or peach as they do on apple leaves. Control recommendations have centred around the use of carbophenothion at the time of 50% egg hatch. Fruit condition has improved in commercial plantings but some marks from other unidentified causes still occur. Recent work on trial sites with low mite numbers showed that similar mite control can be achieved by the use of clofentezine prior to flowering. | |
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