Peach:
Oriental Fruit Moth (OFM): The 3rd OFM flight is well underway in all counties. These adults produce 3rd brood of larvae, which primarily infest the fruit.
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July 7, 2017 Thierry Besancon
Getting the Upper Hand on Virginia creeper
Picture 1 – Virginia creeper vine
Virginia creeper (Parthenocissus quinquefolia) is a perennial woody vine that climbs on other objects or trails along the ground. It is a common weed of orchards, vineyards and blueberry plantation. It is best identified by the typical palmate leaf with 5 leaflets that originate from the same point (picture 1). Virginia creeper will produce many tendrils with adhesive disks at their tips that will allow the vine to climb upward and to attach to any support. It can grow under a wide range of conditions including dry sandy or moist organic soils, sunny or shady sites, and is tolerant to high salinity. Plants will often establish through seeds dropped by birds who consumed the small blue berries in fall, but also by the spread of crawling stems that will produce new roots in contact with soil (picture 2). Virginia creeper is often confused with Poison-Ivy (Toxicodendron radicans). However, poison-ivy has 3 leaflets instead of 5 for Virginia creeper and lacks the tendrils and adhesive disks.
As a perennial weed, Virginia creeper will be tough to control as it can easily regrow after foliar injury from its extensive underground root system. When established, Virginia creeper will most often not be controlled with a single herbicide application, and multiple applications will be necessary to achieve acceptable control. Only nonselective postemergence herbicide (glyphosate) must be used to suppress or control this weed. In order to increase the efficiency of postemergence applications during the growing season, remove the vine from their support during winter pruning and lay it on the ground or plan a “cut stump” treatment during the growing season. Do NOT “prune out” the vine during the dormant season.
Picture 2 – Virginia creeper rooting stem
Spot treatment. Glyphosate may be applied in mid- to late summer after vine flowers in early July until the first signs of fall color appear in the foliage. Good growth and maximum leaf area is needed at the time of herbicide application during the summer. Wet a minimum of 50 percent of the weed foliage with a 1% glyphosate solution (1.25 oz of 4.5lb acid material per gallon of water) for effective control. For best control, don’t apply on stressed/wilted weeds.
Cut stump treatment. Best results are often obtained in late summer and early fall, but before fall color is observed in the foliage. Apply a 1% glyphosate solution to the cambial areas (inner bark area) of the stump of woody plants IMMEDIATELY after cutting. Cut and treat stumps only when the Virginia creeper is actively growing and not under stress.
WARNING. Injury due to root grafting may occur in adjacent plants. Do not treat cut stumps if there is a possibility of root grafting to desirable vegetation. Do NOT allow contact with green bark, trunk wounds, leaves, or root suckers of blueberry bushes.
The mention of trade names and rates is for educational purposes and does not imply endorsement by the author or the New Jersey Agricultural Experiment Station. Always defer to the product label for instructions on properly applying an herbicide.
Fruit IPM for 7/7/17
Peach:
Oriental Fruit Moth (OFM): The next and 3rd flight for OFM has begun in southern counties. This will produce the 3rd brood of larvae. First generation eggs are laid primarily on leaf petioles and larvae mine down the petiole into new shoot growth, causing the flagging on terminal growth. The second generation has a similar behavior, but also lays eggs on the fruit, producing fruit infestations. This generation lays eggs primarily on the fruit, and can cause considerable fruit infestation or ‘wormy fruit’ if left uncontrolled or improperly sprayed.
June 27, 2017 Dean Polk, Dave Schmitt, Atanas Atanassov, Carrie Denson
Fruit IPM for 06/27/17
Blueberry:
Spotted Wing Drosophila (SWD): Adult trap captures have remained close to the averages seen the previous week, but maximum trap captures increased in Atlantic County to 30 males per trap on 1 farm. Weekly applications are still required on both Duke and Bluecrop. The same type of program should also include late varieties like Elliott. No infested harvested fruit have been found on any commercial farms as of this date.
June 21, 2017 Dean Polk, Dave Schmitt, Atanas Atanassov, Carrie Denson
Fruit IPM for 6/21/17
Grape:
Grape Berry Moth (GBM): The timing for second generation treatments in Gloucester County and surrounding areas will be on 6/21 to 6/22. Grape berry moth is the most common insect in NJ vineyards that will directly damage the fruit (See Figure 1.) This timing is for the use of Intrepid, Altacor, and Delegate. If you are using other products like Danitol, Baythroid, Brigade, or Imidan, then you can make the application a few days later. This timing is calculated for 810 degree days (base 47) after wild grape bloom, which was May 16.
June 14, 2017 Dean Polk, Dave Schmitt, Atanas Atanassov, Carrie Denson
Fruit IPM Update for 6/14/17
Blueberry:
General Insect Control and New and Renewed Labels: Late last week we obtained the Section 24C renewal for the high rate of Gowan Malathion 8F. The specifics of the label renewal are as follows: [Read more…]
