Tree Fruit IPM Report for August 14, 2023

Peach:

Oriental Fruit Moth: A biofix point for OFM was set on 4/10 in both northern and southern counties.  All timings for OFM have past. Additional treatments are only necessary if trap captures exceed 6 adults/trap:

Brown Rot: Brown rot is now appearing in ripening fruit in all regions. Most rotting fruit is the result of fruit that is damaged due to cracking from excessive rain or split pits. Highly effective rot materials such as DMI’s (FRAC group 3) and Strobilurins (FRAC group 11) should be applied beginning 3 – 4 weeks prior to harvest. See the NJ Commercial Tree Fruit Production Guide for more information.

Scale Insects: Second generation crawler emergence is just past peak for San Jose Scale and White Peach Scale. White Peach scale has a third generation in September and San Jose scale may have a third generation in October. Esteem and Centaur are both good scale materials. Esteem and Centaur should be applied at the start of crawler emergence. These materials should only need one application. Other options include: Assail, Belay, Actara (Group 4A): Closer (Group 4C); Sivanto (Group 4D) and the bioinsecticide Venerate. These products may need more than one application, typically 2 applications bracketing peak crawler emergence which should occur between the first and third week of August. Only Venerate has a 0 day PHI, making it useful for blocks near or at harvest. Diazinon is also still labelled for peach and apple: for San Jose Scale, it is labeled at a rate of 1#/100 with a 21 day PHI for both peach and apple; for White Peach Scale it is labeled at a rate of 1.5-2#/100 for post-harvest application only. The label requires 14 days between applications.

Apples and Pears:

Diseases: Primary diseases now are the summer diseases such as bitter rot, and sooty blotch and fly speck. Bitter rot control has been difficult at best in recent years even where management programs have been rigorous. Research has suggested products such as Merivon, Luna Sensation and Inspire Super may be effective, and longtime reliable broad spectrum fungicides such as captan and ziram should provide control. Experience has suggested that the addition of phosphorous acid products such as Prophyt or Rampart to captan sprays may improve control. Observations are that these products improve control of other summer diseases such as sooty blotch and flyspeck, and may help suppress scab infections where present. Bitter Rot symptoms continue to appear in all growing regions.

Codling Moth (CM): The first generation codling moth timings have ended. Additional applications should be made if trap captures exceed 5 moths/trap. Trap captures continue and increased slightly in most southern county orchards this week. A biofix was set for CM on April 17th in both northern and southern counties. Codling moth trap captures continue. Most are below threshold, with only a few above 5 moths/trap.

Scale Insects: See peach section above.

Tree Fruit Trap Captures – Southern Counties

STLM TABM-A CM BMSB OFM-A DWB OFM-P TABM-P LPTB PTB
4/15/2023 433 20 1
4/23/2023 423 1 13 8 4
4/30/2023 417 7 15 4 1 0
5/06/2023 9 2 3 1 0 0
5/13/2023 18 2 7 2 3 0 6 6
5/20/2023 5 18 6 0 51 0 13 67
5/27/2023 1 11 4 0 17 0 11 49
6/03/23 3 8 2 1 24 0 13 65
6/10/2023 21 14 5 0 55 0 6 54 0
6/17/2023 10 11 5 0 57 0 8 46 4
6/24/2023 15 5 2 0 57 0 6 47 2
7/1/2023 342 3 0 0 69 0 3 37 6
7/8/2023 463 0 0 0 26 0 0 35 6
7/15/2023 456 0 0 0 0 50 0 0 37 5
7/22/2023 25 0 1 0 0 57 0 0 38 3
7/29/2023 136 0 1 0 0 48 0 0 22 3
8/6/2023 321 0 2 0 0 54 0 0 20 5
8/13/2023 387 1 3 0 0 54 0 0 22 10

Tree Fruit Trap Captures – Northern Counties

STLM TABM-A CM BMSB OFM-A DWB OFM-P TABM-P LPTB PTB
4/8/2023 10
4/15/2023 20 3
4/30/2023 28 11 6
5/06/2023 22 2 19 9
5/13/2023 34 1 3 2 5 0
5/20/2023 31 6 7 1 6 0
5/27/23 16 18 4 1 17 3 11
6/03/23 12 26 2 0 17 2 12
6/10/2023 21 14 5 0 55 0 54
6/17/2023 63 53 2 1 15 1 6
6/24/2023 134 52 3 1 0 11 3 8
7/1/2023 87 33 1 1 0 12 4 1 3
7/8/2023 296 37 1 1 0 30 0 0 1
7/15/2023 189 9 1 1 0 28 4 4 8
7/22/2023 177 6 1 0 0 46 1 3 6
7/29/2023 145 1 2 1 0 24 1 2 2