Pecan Nut Casebearer Predictions

Pecan Nut Casebearer Forecast System

Official Prediction Map Results

Location:Brenham
County: Washington
State:Texas
Prediction Year:2009
10 percent oviposition: 4 / 30
25 percent oviposition:5 / 3
50 percent oviposition:5 / 6
75 percent oviposition:5 / 8
90 percent oviposition:5 / 11
Date of First Nut Entry: 5/11

The above table gives the dates when 10, 25, 50, 75 and 90% of the first generation eggs are expected to be present in the orchard. You can use this information to decide when to scout the orchard for eggs. Begin scouting on the dates of 25-50% oviposition. If egg numbers do not reach a treatment threshold, return and scout for eggs and larvae again on the dates of 50-75% oviposition. If eggs and larvae numbers are still below threshold, scout a third time on the dates of 75-90% oviposition to determine if casebearer infestations have increased to a threshold level justifying an insecticide treatment. The date of first nut entry is the date when the first pecan nut casebearer larvae are expected to begin tunneling into nutlets. If egg numbers exceed the treatment threshold, an insecticide spray is best timed just before the date of first nut entry. Plan orchard spraying so that all trees have been treated on or before this date.

The information provided by this application is for educational purposes only. Treatment decisions should not be based solely on PNCforecast output. The PNCforecast can not account for differences in environmental conditions at weather stations and actual orchard conditions. Growers should base management decisions regarding PNC on their assessment of eggs and larvae in their orchards.

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