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Fruit IPM Report August 21,2012

-Dean Polk, Fruit IPM Agent and
David Schmitt, Eugene Rizio and Atanas Atanassov,
Program Associates, Tree Fruit IPM
  • Late Season Pests
  • Peach
  • Apple
  • Grape
  • Trap Counts
Late Season Pests: Last week’s newsletter summarized the late season options for brown marmorated stink bug (BMSB) control. As we head into the last peach harvests, make sure to check the border areas of orchards and keep a tight program on for BMSB. A number of growers have made the observation that this has again been a “light” year for stink bugs. While that may be true up to now, it is also partially because they have been controlled. One grower had a block of peaches he thought did not have enough of a crop to merit a full spray program, and stopped spraying early. Last week that” light crop” was heavily damaged by BMSB. As the last peaches are picked, BMSB may move into nearby apples. Please refer to last week’s table of insecticides for late season control on apple, adapted for SWD control below.

Peach

Spotted Wing Drosophila (SWD): This small invasive fruit fly is not your normal fruit fly you find on old bananas in your kitchen. Drosophila suzukii lays eggs in and attacks ripening fruit that is not yet picked. Thin or soft skin fruit like cherries, caneberries, and blueberries have been favorites, but other fruit has been reported to be attacked. Anne Nielsen at RAREC recently found SWD maggots in some unsprayed peaches. Infestations have also been observed in lightly sprayed peaches in Massachusetts and the Hudson Valley. Growers who have late season peaches, particularly if you let them ripen well before harvest, should start to look for SWD, and be using materials that are effective for SWD. Do not use neonicotinoids for control of SWD, since they don’t work (Admire, Assail, Actara, Calypso, Belay). Some OP compounds work well for SWD, including Imidan and Malathion, but these have practically no effect on BMSB. 

Late Season BMSB and SWD Materials –7 Day Alt Middle
Material Rate/A PHI Peach/Nec PHIApple BMSB Control SWD Control
Scorpion 5 oz 3 3 Yes No
Venom 3 oz 3 3 Yes No
Leverage 2.8 oz 7 7 Yes Yes
Lannate SP 1 lb 4/1 14 Yes Yes
Lannate LV 3 pt 4/1 14 Yes Yes
Danitol 16 oz 3 14 Yes Yes
Brigade WSB 16-32 oz 14 14 Yes Yes
Bifenture EC 12.8 fl oz 14 14 Yes Yes
Bifenture 10DF 16-32 oz 14 14 Yes Yes
Warrior II 2.56 oz 14 21 Yes Yes
Lamba Cyhalothrin 5.12 oz 14 21 Yes Yes
Baythroid 2.8 oz 7 7 Yes Yes
Delegate 4.5-7 oz 1 7 No Yes
Note: Higher rate work better under greater BMSB pressure. Bifenthrin (Brigade and Bifenture) work best at the .2 lb ai/A rate, listed as 32, oz, 12.8 fl oz, and 32 oz/A

Borers (Peachtree Borer (PTB); Lesser Peachtree Borer (LPTB): Butt sprays for PTB using Lorsban should now be made as soon as possible after harvest. Handgun applications are most effective, since that is what is needed to apply the volume required to “puddle” around the tree crown. The best timing is now through mid-September. Sprays should also be directed into the canopy for control of Lesser Peach Tree Borer, which is now approaching the end of the second generation.

Apple

Brown Marmorated Stinkbug (BMSB): This is now the key insect pest in apples. See last week’s newsletter for more information.
Apple Maggot (AM): Assail @ 8 ozs./ac used at this time for Codling Moth control and BMSB suppression should control AM as well. Most pyrethroids are also effective, and will add to the control of BMSB. Belay is also rated excellent for AM. Belay will also control BMSB and suppress CM (7 day PHI).

Grape

Grape Berry Moth (GBM): The next predicted timings for 3rd  brood applications using Intrepid is on or about 8/23 in southern counties if using Intrepid. Damage from the second brood has been very low in southern counties.
Captures Southern Counties
Date GBM GRB
7/7 6 3
7/14 2 3
7/21 1 6
7/28 1 14
8/4 1 10
8/11 3 5
8/18 2 9

Blueberry End of Season Insecticides: Sharpnosed leafhopper continues to increase as adults emerge. This second generation should be treated as soon as possible. Adult SNLH are the motile forms that can move stunt disease around fields or between infected wild hosts and uninfected bushes.

Spotted Wing Drosophila (SWD): Even though the berries are off the bushes, SWD will continue to lay eggs and reproduce on the few berries still hanging and on dropped fruit. Populations are Very High, and will get higher, since there is the possibility that several more generations will reproduce in the field, before overwintering. During the last part of the season we examined various lugs of machine picked fruit for processing. There were a number of fields that had fruit with 20 to 100+ larvae per 2 qt sample. The good news is that the firmness sorters and other parts of the sorting line took out the majority of the infested berries. The post processed fruit that we have looked at contain “0” larvae. So growers have done a good job in managing the “pest and the pack”. This is now the key pest to deal with over the next several years.

Tree Fruit Insect Trap Counts – Southern Counties
Weekend STLM TABM-A CM OFM-A DWB OFM-P TABM-P LPTB PTB
3/24 2 3 0.17
3/31 2 27 0.28
4/07 7 2 0.14
4/14 3 0 24 0.34 0
4/21 9 0.3 11 49 2 0
4/28 5 1 12 52 2 1
5/5 4 1 4 13 0 1 39
5/12 2 9 10 11 0 6 60
5/19 4 13 5 6 1 15 12
5/26 8 20 6 6 0 26 47
6/2 33 16 5 5 58 1 30 39 0
6/9 13 12 3 2 60 0 13 60 1
6/16 7 5 2 3 37 0 5 21 2
6/23 47 2 1 1 51 0 2 35 3
6/30 22 0 1 2 29 0 1 19 2
7/7 15 0 3 2 21 1 1 5 0
7/14 23 1 4 4 14 0 2 7 0
7/21 35 1 3 4 8 0 2 28 2
7/21 35 1 3 4 8 0 2 28 2
7/28 18 2 5 2 47 1 2 12 4
8/4 28 1 4 2 18 1 2 22 3
8/11 5 1 4 0 8 1 1 13 0
8/18 20 1 1 1 52 0 2 21 1
Tree Fruit Insect Trap Counts – Northern Counties
Weekend STLM CM TABM-A DWB OBLR OFM-P TABM-P LPTB PTB
3/24 15 0
3/31 51 0
4/07 71 0
4/14 88 0 1.8
4/21 202 0.0 0.0 6.7
4/28 56 8.2 0.0 6.9
5/5 9 2.5 0.4 1.2 0.1 0 0
5/12 21 7.1 4.6 1.2 3.2 11.7 0
5/19 18 6.9 9.3 0 1.4 7.9 24.8 0
5/26 9 7.9 11.8 7.3 8.0 0.7 14.0 24.2 0
6/2 163 5.4 14.2 8.8 6.7 0.5 17.2 18.1 0.2
6/9 114 3.3 21.2 5.8 21.3 0.4 23.9 10.8 0.5
6/16 76 4.1 19.1 5.8 10.3 0.3 22.9 9.4 0.3
6/23 135 2.4 14.9 4.0 7.0 0.5 16.7 5.1 0.1
6/30 146 1.3 7.8 5.0 1.3 1.4 10.4 4.1 0.8
7/7 85 1.3 2.4 1.3 0.5 1.0 5.9 7.2 1.1
7/14 210 2.8 1.4 7.0 2.0 3.0 2.1 5.8 1.3
7/21 283 2.6 1.0 2.0 4.0 1.4 2.9 3.7 0.9
7/28 93 3.3 2.5 1.8 2.0 1.1 2.9 3.3 1.3
8/4 71 3.5 2.2 1.5 3.0 1.7 2.4 4.6 1.5
8/11 89 2.9 1.7 1.5 1.0 2.7 2.4 2.7 3.8
Blueberry Insect Trap Counts - Atlantic County
Week Ending CBFW RBLR OBLR SNLH Or. Beetle BBM
4/7 105
4/14 51
4/21 2.6 25 -
4/28 0.43 5.60 0.00
5/5 0.27 1.34 0.00
5/12 0.86 0.62 0.00
5/19 2.91 0.06 0.05
5/26 1.32 0.76 1.03
6/2 1.98 49.45 1.18
6/9 0.81 91.83 0.90 0.59 2.43 0.014
6/16 1.05 92.82 1.61 1.21 134.08 0.015
6/23 0.13 37.00 0.49 0.55 457.20 0.106
6/30 0.0 36.0 0.4 0.5 1011.3 0.2
7/7 0.03 25.59 0.08 0.29 968.87 0.496
7/14 0.00 18.51 0.56 0.52 433.89 0.444
7/21 0.05 21.03 1.86 1.41 60.48 0.235
7/28 0.00 38.53 0.79 2.33 24.58 0.17
8/4 0.00 29.05 0.39 3.71 0.097
8/11 0.00 13.00 0.63 5.77 0.090
Blueberry Insect Trap Counts - Burlington County
Week Ending CBFW RBLR OBLR SNLH Or. Beetle BBM
4/7 49
4/14 42
4/21 0.25 16 -
4/28 0.40 4.30 0.00
5/5 0.52 3.38 0.00
5/12 2.24 0.20 0.00
5/19 2.08 0.22 2.08
5/26 0.49 0.13 7.00
6/2 1.60 22.50 4.83
6/9 0.73 33.5 6.4 0.35 7.5 0
6/16 0.85 115.30 1.00 1.29 172.38 0.524
6/23 1.18 93.86 0.67 2.16 492.00 0.079
6/30 0.4 59.2 0.2 2.3 967.2 0.3
7/7 0.00 17.38 3.30 0.64 470.00 0.030
7/14 0.06 14.75 0.30 0.32 473.89 0.142
7/21 0.00 8.03 0.33 0.03 88.44 0.077
7/28 0.0 1.20 0.50 1.22 16.00 0.54
8/4 1.50 3.50 2.88 0.000
8/11 3.50 1.00 5.33 0.000