Request for input: very short survey re: UVM Horticulture website

In order to better serve commercial growers, we will be updating the UVM Extension Commercial Horticulture website. The goals of these changes are to increase the website’s usefulness, functionality, and accessibility. Feedback from this survey will provide useful information to aid assessment of these updates. This survey will take approximately 2-5 minutes to complete.

The survey is at: https://qualtrics.uvm.edu/jfe/form/SV_egptb3eVpYxXN0a

Please complete by July 7 if possible.

This survey complies with Institutional Review Board policies at the University of Vermont, and because no sensitive data are collected nor are responses attributable to individual respondents, it is exempt from increased privacy protocols under certificate CHRBSS: 18-0332. Questions regarding this survey may be directed to: Terence Bradshaw, tbradsha, (802) 922-2591.

VT Apple and Grape IPM: Much-needed rain, response to May 18 freeze

Good evening:

Here’s another joint apple-grape bulletin. The news of the week is that we finally have a good dose of much-needed rain. Our trees and vines will appreciate this very much after the dry May and early June we experienced. For most sites, this should replenish the moisture that the plants have been begging for, or that you have been working hard to provide via irrigation. It also means that weeds are going to grow especially well, so keep an eye on your groundcover management.

More important is disease management. Apples are basically done with scab, but 2-2.5 inches of rain by the time this is all done means there is no fungicide coverage against summer diseases, and that any scab that did sneak through can easily spread. Grape growers- we’re in peak disease management season. Organic, natural, or conventional- be sure to cover up with your fungicide of choice between the rains. See netreefruit or New England Small Fruit Management Guide for best options.

Insects remain quiet on grapes, aside from some grape tumid gallmaker that has popped up here and there. In apples, codling moth are at a prime time to manage right now in most orchards. Check NEWA for best timing in your orchard.

Finally, I have heard from some apple growers, and suspect that a few grape growers may have heard the same, that Farm Service Agency has reported that because those crops are eligible for federal crop insurance, that any uninsured producers facing crop damage from the May 18 freeze are cannot expect further assistance in un- or under-insured. This is a systemic issue across the region, and the Commissioners and Secretaries of Agriculture across the ten-state region from Maine to Delaware have recently petitioned USDA Secretary of Agriculture for increased support for growers in the region. This is a critical step to receiving support, and should any be passed down to farmers, it will likely come through Farm Service Agency office. That is why it is so important to register with your FSA office that you had damage, so that they may contact you should aid come from the federal level.

Take care and please let me know if you have any needs or questions,

Terry

Request to USDA from NEASDA for Freeze Damage Aid 06.14.2023.pdf

VT Apple IPM

Word is getting out in the media about the crop loss from the May 18 freeze. I am trying to manage the messaging a bit to nudge writers to encourage customers to support orchards and other farms this year. We don’t need the public writing the crop off before we even have. On that note, I am hearing a few promising signs that there are some fruit out there, even in some orchards that thought they had zero to work with. Some inland orchards are reporting 10-30% of a crop where we thought there was none. That’s a good thing, even if frost-disfigured fruit only make it into cider. But that also complicates management.

I’m considering apple scab still active in most parts of the state, even if NEWA says otherwise. Extended dry weather pauses ascospore maturity and makes the models less predictable. Next week looks showery and most orchards should see any final spores release in the next significant wetting event. Keeping fungicide protection on now will prevent scab from building and will also reduce the likelihood of other diseases like Botryosphaeria leaf spots and rots and apple blotch or Marssonina building up and causing tree defoliation and other symptoms. These relatively weak fungal diseases are often managed when spraying for scab and summer fruit diseases, so maintaining at least a minimal spray program will help prevent them from becoming established in the orchard to become a problem next season.

Insects still need management. Check NEWA or your min-max thermometer and calculate your degree days to run your models for the important pests now- plum curculio, codling moth, and the leafrollers. PC is nearly done with its egglaying period in most orchards. Codling moth is just about to hatch so next week looks like a good time to manage that pest with targeted treatments. Look to the New England Tree Fruit Management Guide for best materials to consider.

VT Grape IPM- Vintage 2023 is picking up steam

By now vineyards should have shown the effects of the May 18 freeze event (and a little damage here and there from the less severe May 26 frost that some sites may have seen) and it appears that, by and large, all is not lost. That isn’t to say that there isn’t extensive, and sometimes massive damage in many vineyards. In some cases secondary or even tertiary shoots are pushing, in some cases we don’t’ even have that. But it does sound like there will be wine from much of the state. Here are some management considerations to think about moving ahead.

First, keep up on your disease management. We are entering the immediate prebloom period where all of the major early season diseases are active. It’s (finally) been wet but not a soaking rain for the past week and next week looks showery. Keep your fungicide coverage on, even if you don’t think you’ll have a crop. Obviously no shoots means no tissues to protect, but even fruitless shoots will be susceptible to disease and unmanaged disease this year will become a big headache next year as you’ll have a large overwintering inoculum.

Next, keep an eye on water. I know most grapes in Vermont are not irrigated but in a year like this. At the UVM Horticulture Center we have received just over an inch of rain in the past month. That’s not enough for sufficient growth and production.

Finally, you should now be looking at any canopy management that the vineyard needs. In areas with little freeze damage, this is the time to thin shoots down to 4-6 per foot of canopy. That foot can be on a cane, cordon, or other structure. The cordons or canes may have been compromised and not pushing any shoots, you may be seeing growth coming from the head at the top of the vine trunk. If that zone, which we may say is about one foot, is all you have that is pushing buds, then I would leave more than the 4-6 that the above formula would call for, but rather leave double that. You will need to be tying and training canes in the next few weeks to manage that growth and reduce shading and moisture buildup. If you decide that the vine needs to be rebuilt from the ground up, keep an eye out for shoots that emerge from the root zone (non-grafted vines only) to train up as new trunks. I know the tissues low to the ground are among the most vulnerable in a frost, but the root system may be a source of new shoots produced from hidden or adventitious buds.

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Meeting for Local Orchardists (Putney, VT, June 14)

Sorry I won’t be able to make this but anyone from the fruit industry who wants to share your experiences relating to the May 18 freeze is welcome to join. And if you haven’t contacted FSA yet, be sure to do so. -TB

FOR IMMEDIATE RELEASE

Local orchardists and other growers are invited to a meeting on June 14 at 7:30 pm at Green Mt Orchards , West Hill Rd, Putney, Vt. with State Sen. Wendy Harrison and State Rep. Mike Mrowicki along with UVM Agriculure Extension Agent Vern Grubinger.

The meeting is for local food producers to share about their losses from the severe freeze that occurred in May. Estimates are that almost all of the local apple and peach crops have been wiped out for this year. Other growers have also experienced losses and your local legislators want tom assess the damage and try and find ways to help.

The meeting is open to the public. Any grower who has experienced a loss is encouraged to attend or to contact by email; Sen. Harrison wharrison or Rep. Mrowicki mmrowicki

Mike Mrowicki

Vermont State Representative
Windham4 District- Putney& Dummerston
mmrowicki

Important: Crop Damage Reporting to FSA Offices

Good morning:

I spoke with USDA Farm Service Agency officials last week and they are receiving relatively few reports of the crop damage from the May 18 freeze event. We are anticipating some form of federal assistance to come, which will likely be administered through FSA offices.

Please contact your FSA office (details attached) as soon as possible to indicate potential crop loss on your farm. You do not need to file a detailed report, just to get on the list.

Thanks,

Terry

FSA Service Center Directory.pdf

VT Apple IPM

It’s finally looking like there’s a better than zero chance for rain in the next few days. Everyone, regardless of the status of your apple crop, should be covered going into this (hopeful) rain event. If you have fruit, plum curculio is likely your main pest of concern right now, we’re about a week away from codling moth egg hatch. Keep an eye on your fruit set and if fruit are still clustered up, consider a thinner.

Be careful (or just don’t) with spraying in heat. I’ve done a good bit of damage to fruit and foliage when spraying over 85°. Best window if you can cover the orchard quickly enough is once it starts cooling down tonight through tomorrow. The front coming through will bring wind.

That’s all for now- I have a sprayer to set up.

-Terry

VT Apple IPM: Management in light of a difficult crop situation

We have been collecting damage data from orchards across the state this week, and the news is generally not good. It does seem like we have three classes of damage: near-complete crop loss inland and Connecticut Valley, some degree of often substantial loss in the Champlain Valley, and a good crop in the Champlain Islands and near the lake. As far as management goes, that leaves us in three different scenarios, and those in one of the scenarios- complete crop loss- may not be crazy about hearing me discuss how the lucky ones tend to their crop this season. I’ll make some notes in a bulleted list without much formatting, as I have more orchards to scout this afternoon:

  • Apple scab- This one is easy, it is still active, with no orchards having discharged all overwintering inoculum yet. Wetting events are few and far between but all orchards need to keep covered against scab. Be sure to include a fungicide effective against rust, like a DMI (FRAC code 3) or SDHI (FRAC 7) and/or powdery mildew (strobilurin, FRAC 11) in a couple of sprays to keep those diseases at bay. This protocol should be followed for all orchards regardless of crop freeze status.
  • Keep an eye out for fire blight strikes. Any blossom infections that may have occurred from the May 12 potential infection event should be showing now or next week. If you see them, cut them out.
  • Thinning is going to be complicated a lot by crop status, of course. For orchards that have no fruit or heavily damaged fruits (meaning more than 75% )do not consider thinning this year. For orchards with less than 20% damage I would consider thinning as normal this year. The question comes with orchards that have moderate damage between 25 and 75%. Not thinning those orchards may result in heavy set of small fruit that could promote biennialism, but trees are likely to respond well to thinners applied in the next week, given both the cold damage and the warm sunny, weather that we are expecting coming up. My tactic at the UVM orchard, which experienced moderate fruit damage between 20 and 70%, depending upon cultivar, was to apply a low rate of NAA thinner with a low rate of carbaryl insecticide. This could be a gamble – we have 70 varieties across the whole orchard and it is difficult to thin based upon variety even in a ‘normal’ year. This is not an uncommon problem for retail orchards to face. I do not have the greatest confidence in this strategy this year, and have difficulty recommending blanket sending recommendations to growers given the state of the crop this year. in the end, I would trust your gut – if you have a good crop thin it, if you have a moderate crop consider thinning it lightly as we can come back in later next week when we can see better the effects of both the frost and any thinner applications you may have applied.
  • Insect management-this will also differ, depending upon the state of the crop in your orchard. For orchards with a full or even a moderate crop, I would plan to manage your insect pests as normal this year. Petal insecticide sprays should have already gone on in most orchards. Inland orchards and cooler sites may be ready for a petal fall spray now. Normally our petal fall sprays are targeted at European apple sawfly, early emerging codling moth, and plum curculio. All of those pests are fruit feeders so orchards that have no fruit or are assuming to have very little fruit may consider omitting all insecticide applications targeted toward protecting fruit. The difficult situation comes where orchards have a low set of fruit where the expense of the application on a per bushel basis could be quite high but the value of the few apples you have is also high. If there’s any question about whether or not you have sufficient crop set in your orchard, I would go ahead and treat as usual. If you have no crop or nearly no crop , then you may consider omitting those insecticides. However, I would consider maintaining some coverage primarily for shoot and leaf feeding, lepidopterous caterpillar larvae. That may mean including BT sprays in petal fall, scab, thinning, or other sprays in order to keep down leps like obliquebanded leaf roller and tent caterpillar. In orchards with little to no crop, the great reduction insecticides used this year may allow beneficial populations to increase substantially, setting you up for a better IPM program next year. I would however not ignore trunk applications of Assail or another appropriate insecticide in young plantings to avoid issues with dogwood and other borers.
  • Nutrients-for trees with little to no crop nitrogen applications should not go on this year unless trees are under vigorous. For all other trees, fertilize as you normally would. For trees with little to no crop this year potassium is not likely to be removed in any significant amount because that is usually removed in harvested fruit. However, it is important to maintain or improve the potassuim status in your orchards to ensure that you have an appropriate amount of that nutrients going into next year when it is likely orchards, will have a heavy crop load. I would consider applying magnesium potassium fertilizers in the next month or so regardless of crop status.

That’s it for now. I hope to have a better understanding of the crop situation soon, but you all likely know where you stand on your own farms. I will continue to work with the Agency of Agriculture to see what resources we can bring to the industry in this tough year.

Take care,

Terry

Important: orchard / vineyard freeze damage assessments

The devastating freeze event that nearly all of us saw on May 18 will have a massive impact on the 2023 Vermont apple and grape crops. I have met with Vermont Secretary of Agriculture Anson Tebbetts and representatives from our federal congressional delegation and they are working on finding resources to help support affected farmers. We have been asked to collect as much data as possible to help inform these efforts.

https://go.uvm.edu/2023fruitfreezereport

The UVM Fruit Team has developed an online reporting form to collect this information. This is separate from any assessments that may be conducted for crop insurance purposes- if you are making a claim, please contact your insurance representative in addition to filling out this form.

We also recommend contacting your local Farm Service Agency to establish access to any potential assistance with this event.

It is important that we develop the best assessment of damage possible in the region to inform any efforts to leverage support. These data come directly to me and I will share with the Agency and other organizations anonymously. You may answer any questions that you wish to.

We are asking for general economic impact on your farm, as well as block-by-block damage reports. You can fill out those block reports as much as you want- there are fifteen blocks or cultivars you can report; if you want to report more, just retake the survey and only complete that section. Most important is to report potential crop value lost in the final section.

My graduate student Eli Wilson noted his protocol; for collecting damage in apples. The collection should be similar in grapes but you will be assessing damaged shoots as opposed to fruitlets. Feel free to modify your protocol as you see fit, you will only be reporting percent of fruitlets or shoots damaged.

Apple fruitlet damage assessment protocol.

Be sure to take note of:

1. Location on slope (Top, mid-slope, bottom)

2. Row orientation (North to South, East to West)

3. Cultivar

4. # of damaged fruitlets

Collect a total of ten fruitlets per tree from the bottom, middle, and top of the canopy. Slice the fruitlets in half (vertically) to assess them for damage, any internal brown/yellow tissue or seeds should be considered damaged. Record the number of damaged fruitlets out of ten. Repeat this protocol for every eighth tree in a row and for every sixth row of a block unless you wish to assess a specific cultivar in which case you should add this row to your assessment but not substitute it.

**Attached to this email are images of a healthy fruitlet and a fruitlet with minor cold damage do give you a baseline for your assessments. Any fruit with that level of damage or higher should be include in your damage report**

Figure 1: Healthy apple fruitlet

Figure 2: Damaged apple fruitlet

My team will be available and conducting assessments around the state this week and likely next. There is a lot of ground to cover and we cannot hit every farm so please consider conducting your own assessment and reporting you data in the form. I will be monitoring the form and trying to get to underreported areas as I can, considering my other responsibilities at this time of year.

Please reach out to me if you have any questions,

Terry

https://go.uvm.edu/2023fruitfreezereport