Rutgers Cooperative Extension
Seasonal updates on insects, diseases, weeds, maturity dates and cultural practices impacting only tree fruit.
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Peach:
Oriental Fruit Moth: Second generation timings are updated below. Second flight adults are still flying statewide. Treatments for the second generation have just finished in statewide. Applications for OFM should now be made only if trap captures exceed and average of 6 moths/trap. [Read more…]
Peach:
Oriental Fruit Moth: Second generation timings are updated below. Second flight adults are still flying statewide. Treatments for the second generation have just finished in southern counties, and are going on now in northern counties. [Read more…]
Peach:
Oriental Fruit Moth: Second generation timings are updated below. Second flight adults started this past week in southern counties and are about to start this coming week in northern counties. According to the model, treatments for the second generation should be going on now in southern counties, and should start next week in northern counties. [Read more…]
Recent Rain Patterns and Insecticide Use:
Given our recent periods of rainy weather, many growers are questioning the need for repeated applications, and the weatherability of the materials already applied. Dr. John Wise at MSU has been studying the residual properties of insecticides for a number of years. [Read more…]
Peach:
Plum Curculio (PC): PC oviposition should be done in all areas of the state, and there is up to 2-3% of fruit injury with egg scars. We have accumulated about 911 DD since petal fall (apple) in southern counties and just over 663 DD in Hunterdon County. The Cornell model calls for insecticides applied up to the 340 DD50 mark. Therefore, all sprays for this insect should be done. The model assumes a single generation in NJ, which is historically what we have had. New research from Anne Nielsen’s lab is telling us that the southern strain of PC is also present in the state. This is a multi-voltine strain, which means there is more than one generation per year in some parts of the state. Therefore with an early spring, we may see additional injury later in the season. [Read more…]
Peach:
Plum Curculio (PC): PC oviposition continues in all areas of the state. We have seen increasing levels of damage, particularly in northern counties with up to 2-3% of fruit injury with egg scars. We have accumulated about 103 DD since petal fall (apple) in southern counties and just over 64 DD in Hunterdon County. The Cornell model calls for insecticides applied up to the 340 DD50 mark. This allows for the last of the PC activity to be covered by the residual from the last insecticide application. Therefore PC is still a primary target and needs to be controlled during the next couple of applications. [Read more…]
