- Sterile Moth Technology to Target NOW in Tree Nuts
- NOW Pressure on the Rise in Walnuts
- Predicting Nonpareil Almond Damage in Kern County
A Multiple Threat in Nut and Fruit Trees
- Native to the Southwestern U.S. and Mexico
- First identified in Arizona in 1899
- Orchard sanitation critical for effective pest management
- Kernel damage associated with aflatoxin contamination
- Pheromone traps useful to determine pesticide application timing
Navel Orangeworm (NOW) is a serious pest of high value nut trees including almonds, pistachios and walnuts. Larvae bore into the nut, feeding on the nutmeat rendering it unmarketable.
Additionally, feeding activity increases susceptibility to Aspergillus molds which may result in aflatoxin contamination.
NOW moths are highly mobile. Some researches estimate moths are capable of traveling up to half a mile during the night.
For effective intervention, it is necessary to monitor NOW population levels. In general, constant monitoring is recommended. Contact local extension resources for specific regional recommendations regarding pest management strategies and control options.
Place traps in mid-March (prior to first NOW flights). Use at least three traps per grove/orchard. Traps should be placed 6-7 feet high in the tree and should be checked at least once per week.
A 30-day lure (sold separately) is required.