Fruit IPM for 7/21/17

Peach:

Oriental Fruit Moth (OFM): Treatments for the third brood are almost over. The second and final treatments are due in southern counties by this weekend. The first sprays for this brood are due in northern counties by this weekend. As with the previous generations, timing for the third generation depends on the type of material that is used. Application timings are as follows:

Tufted Apple Budmoth (TABM): We are between 1^st and 2^nd generations, and there is no activity at this time. Overall pest pressure was very low for the first generation, but that may change for the second flight in August. Growers in northern counties should be aware of this insect, since populations have been relatively high in northern counties for the past several years. Predicted timing is summarized in the table below:

San Jose Scale (SJS): Second generation crawlers are active in southern counties. No problems have been seen on commercial farms. If you have scale present in your orchard, then effective materials include Assail, AdmirePro, Leverage, Actara, Belay, Diazinon, Esteem, Centaur, and Movento. See the production guide for rates.

Thrips: We have not seen any thrips build-up yet. However, prolonged hot dry weather is always favorable to thrips. If you notice any thrips in the coming weeks, then consider Delegate @ 6-7 oz/ac, or Lannate SP @ 1#/A (or LV @1.5-3 pt/A). The addition of a non-ionic surfactant can help improve control. Delegate has a 1 day PHI for peach/nectarine, and Lannate has a 4 day PHI on peach.

Japanese Beetle (JB) and other Scarab Beetles: Japanese beetle adults are present at low numbers in all counties. Very little fruit damage has occurred. Most insecticides will control these insects but the best materials are formulations containing Imidacloprid (Admire Pro; Leverage); Carbaryl (Sevin); Phosmet (Imidan); or Fenpropathrin (Danitol). These materials, except Danitol, are not effective for BMSB, but few to “0” BMSB are present in orchards.

Apple:

Codling Moth (CM): The 2^nd flight increased significantly last week in southern counties, and has just started to increase in northern counties. Last week also coincides with the timing for the second insecticide applications in southern counties. Now, additional applications have to be based on trap counts or insect pressure. If the trap count is greater than 5 males per trap, then additional applications are required. The second of 2 applications is due by the beginning of next week in northern counties.

Woolly Apple Aphid (WAA): WAA colonies are still present in several orchards in northern counties. Controls for this insect are Very Limited. Therefore, you cannot let WAA get out of control, and must control this generation if present. WAA colony growth can be aggravated by repeated pyrethroid use, as well as Delegate use. The window for using Movento is fast closing, and soon the leaf tissue will be too tough for the insecticide to be taken up by the plant. If you do have WAA, now is the time for control. Applications with Movento @8-9 fl oz/A combined with a spreader/penetrant should offer the best control. This is a systemic material, and MUST BE applied with the spreader/penetrant adjuvant, Not a sticker. Movento will not work well later in the season when the leaf tissue is thicker and less able to absorb the product. This is one reason why earlier control is better than later control. This application will be more effective if used in a full cover/every middle application. Apply at dusk or very early in the morning in sufficient water volume for maximum absorption and to slow down the drying time.

Blueberry:

Spotted Wing Drosophila (SWD): Adult trap captures have continued to increase. Growers are advised to maintain treatments on anything that is still picking for ANY market. We can easily find live larvae in unsprayed fruit at this time. Salt floatation tests done on fruit from commercially treated fields has remained at “0” for the entire season.

Blueberry Maggot (BBM): Trap captures are very low, but have come up slightly in Atlantic County. This is likely due in part to the decreased use of insecticide, now that ‘Duke’ and in some cases ‘Bluecrop’ are done. Any late variety fields still need to have sprays maintained, since these higher populations can still be attracted to those fields. All insecticides used for SWD will work for BBM, except Delegate if the BBM pressure is high.

Oriental Beetle (OB): While trap captures of adults remain high, the flight has peaked. The window for effective use of Admire is now closed, since many of the grubs are 3^rd instar and too large to be killed by the insecticide. While late applications will kill some larvae, it may not be economically effective at this stage of larval development.

Putnam Scale: First generation scale crawlers are no longer present. We are maintaining monitoring tapes in several locations in order to determine when second generation crawlers will be present. This should occur over the next several weeks.

Sharpnosed Leafhopper (SNLH): Adult trap captures have continued to decrease in Burlington County. Activity has increased slightly in Atlantic County, but in part driven by one location. We are still between generations, and no treatments are needed at this point.

Tree Fruit Trap Counts – Southern Counties

Tree Fruit Trap Counts – Northern Counties

Blueberry Trap Counts

Atlantic County

 Burlington County