IPM MESSAGES 2013 You can also call in to 508.295.2212 ext. 60.

Historical Messages: | 2012 | 2011 | 2010  |   2009  |  2008  |  2007  |  2006  | 2005  | 2004

Quick Links to 2013 IPM Messages:

IPM Message June 27, 2013

Things seem fairly quiet so far. State Bog is 60-80% IN bloom. The Stevens at Rocky Pond Bog in Miles Standish are 5% out-of-bloom. At State Bog, the Ben Lears were 25% out-of-bloom and the Early Blacks were 13% out-of-bloom mid-week. For new hybrids and some early cultivars, recommended spraying for cranberry fruitworm control is at or close to 50% out-of-bloom so you should be collecting data now so you don't miss 50% out-of-bloom. It is time to fertilize with your bloom time application. If you are using sulfur for pH remediation, make sure you are applying when the bogs will be dry. Puddling and sulfur will injure vines.

People have been reporting leaf miner moths on their bogs, but we have no control options to offer. Green spanworm moths have been flying. Hoplia, oriental beetle, Equina, and cranberry root grub adults are also flying now.

Frank is off to the Left Coast. Good luck, Frank!

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IPM Message June 21, 2013

You may need to be checking early varieties and hybrid varieties soon for %out-of-bloom. Bloom is moving quickly in some areas. It is always good to get 2 %oob counts BEFORE you hit 50%, just to improve your estimate. Some growers may be spraying for fruitworm control by the end of next week. Late water Howes are very behind and barely at bloom yet. It is too late to be spraying for weevil (unless you have LW Howes). Honeybees should be out there working as the weather has been very nice. Bloom time fertilizer applications can go out now. Be careful if hot weather comes if you are usually adjuvants in your mixes. This is especially true for crop oil concentrates. Indar and Abound combinations are good for second fruit rot sprays but remember the 2-week holding time for Abound. It's Frank's last week. Good luck in retirement, Frank!!

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IPM Message June 14, 2013

Just a short message this week. Bloom is coming on strong this past week. It is absolutely the time to be putting out first fungicide. The weather has not been cooperative, so if you haven't yet sprayed, do it as soon as you have a chance. The window for controlling early season insects is closing unless you have really high numbers. We have had reports of 14 spag larvae and 20 weevils. These are cases that definitely need managing. Bloom time fertilizers go out around 75% bloom, you should check, but most likely many bogs are not quite there yet. Pinheads have been noted especially on the new hybrids.

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IPM Message June 7, 2013

This is the week of spag. There is, however, no easy answer!

Many growers have reported finding Sparganothis larvae in their sweep nets this week. Small, medium, and large larvae have all been reported, as well as the beginning of flight in the pheromone traps (that should be up by now). A few growers reported higher counts of larvae, but most reports were right at or under threshold. Perhaps Avaunt took out all the other caterpillars and now all we find is Spag. It DOES appear to be higher than normal reports. Pheromone trap numbers will go up for the next 3-4 weeks before they start going down! The eggs take 9-12 days to hatch.

The only choices to manage Sparganothis fruitworm are Intrepid, Altacor and Delegate. Intrepid and Altacor will not kill large larvae. They need to be eaten and are best timed against eggs and small larvae. They require good chemigation systems and likely anything over 6-8 minutes will be too watered down to be effective. Several days of good weather are also necessary to maximize effectiveness. Delegate is more likely to take out the medium or larger larvae. We have gotten a few reports of Delegate failures; spag numbers increasing after a spray. Remember, Sparganothis are particularly hard to manage as they are squirrely, web-up and resistant to all organophosphates. Intrepid added to Bravo for first fungicide will help for a few weeks and Altacor for first fruitworm should also impact any spag that are out there.

Bogside Workshop Friday June 21 8:30-10 AM at the Cranberry Station. Katie Ghantous and Hilary Sandler will demonstrate how to use hand-held flame cultivation devices to control weeds. We will be demonstrating a 'mini cannon'sprayer that can be mounted on an ATV, golf cart, or back of a pickup and sprays about 30 feet. Peter Jeranyama will cover irrigation issues, Carolyn DeMoranville will cover fertilizer use, and Frank Caruso will discuss disease management. This will be Frank's last event with us prior to his retirement at the end of the month!

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IPM Message May 31, 2013

Many growers have been treating with Avaunt over the past few weeks for winter moth or weevil. We learned that gypsy moth sometimes gets through Avaunt, similar to spag getting through. One site had false army, blossom, weevil, bhf on a few pieces plus some spag too with all at, or close to, threshold. Another grower found spanworms in numbers greater than 50 in a sweep net in one case, along with weevil and cutworms. A grower in Rochester had gypsy moth, winter moth and brown spanworm. Another found spag only starting this week, and not just small ones. One grower had cutworms that made it through a long rinse time (end of line) of Delegate. We had weevil at Rocky Pond and sprayed on 5/18 and checked midweek with no return. State Bog had low counts of winter moth and weevil. On a late water bog, a grower reported high weevil and mid-range spanworm counts.

From IPM Scout Monika Shuler: In her fourth week of scouting and reports: most growers had high enough counts to treat two weeks ago and most used Avaunt for fireworm, winter moth, green spanworm and a few cutworms. Last week counts were down. This week, however, is a completely different story - there has been nothing short of another "explosion" of insect pests - namely cutworms and an extended hatch of green spanworm. The bottom line is that the larvae are back and they're big.

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IPM Message May 20, 2013

Insect populations continue to be low. However, now is the time to sweep!

Winter moth larvae are easily seen in sweep nets at this time. Populations are not nearly as high as expected this year, but it would be wise to check your own bog. Small gypsy moth, false army worm and even black-headed fireworm have been reported on bogs.

Cranberry weevil are active at this point and some pockets over threshold (4.5/25 sweeps) have been found. Remember, grey weevils found in the sweeps should not be counted as they are not a cranberry pest. Avaunt is a good choice if you have both winter moth or other larvae and weevil. If weevil is not in the mix, Delegate is a good choice for the worm pests, as is Intrepid.

Dodder seedlings are germinated everywhere, we are reaching the end of the window for pre-emergence sprays for dodder. Quinstar is now fully registered for both pre- and post-emergence control of dodder. Many handler restrictions are in place for this compound, so make sure of your handler's requirements before using. Also note that the allowed MAXIMUM RATE on the label is 8 oz. per acre per application with a maximum of two applications [the old Section 8 label allowed up to 12 oz. per application - the new label does NOT].

The window for pre-emergence management of other weeds is over. If the weeds are up, time early post-emergence Callisto applications in the next two weeks or so. This material requires 4 hours to be rain fast.

Frost continues to be a concern with all cultivars advanced to at least bud elongation stage. The tolerance for all cultivars is 29.5 degrees Fahrenheit. Click here to see growth stages and frost tolerances.

Since we have reached bud break, we reaching the end of the window for fungicide treatments for upright dieback If you had this disease in 2012, consider an application of fungicide following the recommendations in the Chart Book.

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IPM Message May 6-8, 2013

Winter moth larvae were picked up in sweeps last week. There is only a small window of opportunity to get out and sweep this week before the poor weather conditions come in, so try to get out there to see if winter moth is on your bog. Growers were picking up averages of 8-10 larvae last week. They are very small but you should be able to see them. At this size, it is hard to tell if they are WM, black-headed fireworm or Spag, but most likely, they are WM. Avaunt is a good choice along with Delegate and Intrepid.

Cranberry weevils have been swept in the past few days, but not in numbers to trigger a spray. Grey weevils have also been picked up, but these weevils do not eat cranberry.

Dodder seedlings have been reported inland over the weekend (May 4). Scout in the duff layer for emerging seedlings; you do not need to dig into the soil to find the seedlings. Plan herbicide treatments for about 2 weeks after early seedling emergence. Day-old seedlings were noted in Onset on May 8. Photo below shows single dodder seedling (probably several days old) on duff layer.

The first frost warning was issued on April 16. Most growers have been out frost protecting almost every night since then as we have had 16 warnings. Protecting started earlier in the night for typical spring time protection such that we already have as many "pump hours" as we did all of last year. Click here to see the most recent growth stages and frost tolerances.

We are past the window for applying preemergence herbicides in all but the coldest of locations. It is probably too early to be applying Callisto or other postemergence herbicides but if you are in a warm location and the weeds are up, you could be in the window. Callisto needs about 4 hours to become rainfast. Most growers should probably wait until next week before applying any early Callisto sprays.

We are looking for sites to study POISON IVY. If you would be willing to help us out, please call extension 21 or 27. We will be testing combinations of Poast and Callisto (so no crop-destruct). We are also looking for DODDER sites where we can use QUINSTAR. We are getting desperate, so if you are cleared for using QuinStar and have dodder and would be willing to help us out, please call extension 21 or 27.


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