Zack Snipes
24.07.2023 - 12:04 / hgic.clemson.edu
Zack Snipes reports, “One of our weather stations in Mt. Pleasant got down to 19F on Saturday night. Last Thursday our high was 73F, and 55 hours later, it was 23F. That swing in temperatures can hurt plants as they aren’t as acclimated to the cold when it hits. Our strawberries should be fine as our temperatures did not get into the low teens or single digits along the coast. Time will tell how our brassicas fared in the cold temperatures.”
Justin Ballew reports, “It’s been a cool week in the Midlands. We’re seeing symptoms of cold stress on brassicas, including reddening/purpling of leaf margins and some burn on our more tender greens and cabbage heads. There’s not much we can do about it other than wait for warmer days. Applying more fertilizer won’t do much until the soil warms up enough for the roots to speed up their growth again. We haven’t seen many insect or mite problems recently due to the cold, wet weather.”
Sarah Scott reports, “We had some wet weather this past weekend, so many growers are letting fields dry out before continuing to plant new peach trees. Pruning continues, as well as some orchard floor maintenance. We are looking good on chilling requirements right now.”
Phillip Carnley reports, “Happy to have some cooler weather to help put the brakes on strawberries in my area. A few growers are experiencing leaf spot, but population levels don’t warrant treatment at this time. With the cooler weather, I have noticed an absence of aphids on foliage of falls greens, but they are finding overwintering sites on root vegetables like turnip below the soil line. Blueberries are already in the process of blooming as well.”
Andy Rollins reports, “Strawberry crowns can be damaged by 18 °FThankfully the crown
Rob Last reports, “Following a few days of warmer conditions, crops are moving on strongly. Flowering and fruit set is occurring in strawberry crops. At present, spider mites in treated crops are at very low populations, but with warmer weather, populations can increase rapidly. As we are entering flowering and fruit set, sanitation and fungicide applications will be required to keep gray mold managed. Remember to rotate FRAC codes to avoid resistance build-up. Fertigation is being applied, and it will be well worthwhile taking a tissue test from crops. Blueberries in the area are showing bud swell with early varieties showing open flower.”
Rob Last reports, “Given the rainfall and humidity levels, we are seeing increases in foliar and fruit diseases on a range of crops. This includes cottony leak in cucumbers, anthracnose in peppers, tomatoes, and cucurbits. Also, please be aware cucurbit downy mildew is very active now. As a result, it is going to be really important to maintain fungicide programs in both a timely manner and to be robust. That being said, we have some great quality melons, both cantaloupe and watermelons, coming to harvest, as well as good volumes of quality peaches, blackberries, and a host of other vegetable crops.”
Zack Snipes reports, “We are in a summer weather pattern with warm, muggy days and occasional thunderstorms. Most crops have finished up or are in the process. Now is a great time to sit down and do some crop planning and field rotation planning. I collected many soil and root tissue samples lately and had them analyzed for nematodes. I was surprised at how many nematodes were present in the fields. Nematodes can interfere with growth, cause stunting, and lower overall yields. Sometimes the symptoms of nematodes can be very discrete, so sampling right now is the best way to get a baseline of your populations and how to properly manage and rotate fields. If left unchecked, thousands of dollars are wasted before the first seed is planted into a field.”
Justin Ballew reports, “Not much has changed in the midlands over the last week. We’ve received some scattered rain, and it has been warm and humid. As a result, we are still seeing disease issues. We’re still picking tomatoes, squash, zucchini, cucumbers, sweet corn, and a few greens. We’re at an in-between stage in several fields where the spring crops have finished, and folks are preparing to plant fall crops. Some have already started fall cucurbit plantings. For anyone planting strawberries this fall, if you are still deciding which varieties to try, see NCSU’s 2020/2021 variety comparison data (pages 9 and 10).
Rob Last reports, “We are progressing well with preparations for strawberry planting. Some plants are due to be delivered this week. Remember, if fumigants have been used, check to ensure the products have dissipated to prevent damage to the transplants. The same is true to make sure planting restrictions on any pre-emergence herbicides applications are observed. Always refer to the label. Finally, remember to check your plants carefully for pest and disease inoculum from the nursery. Planting any disease or pest-infected plants will lead to a more challenging growing season. If you require any help, please reach to Extension Agents.”
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Rob Last reports, “In our area, pest and disease pressure have reduced in response to cooler dryer conditions. Keep an eye on soil moisture and continue to regularly scout crops.”
Rob Last reports, “Pest and disease activity remains low in the area. However, disease pressure may increase following some welcome rainfall last week. Remember to keep scouting. I would also like to wish everyone a very Merry Christmas and a Happy New Year.”
Rob Last reports, “Pest and disease issues in the area remain very low; however, as temperatures rise, we expect activity to increase. Although it is quiet, it is still essential to continue to scout. Assessment of crops indicates that we have escaped the worst of any chill injury or loss of plants. Pruning of fruit crops continues while dormancy holds and labor begins to return to the area.”
Rob Last reports, “Strawberries in the area look good, with some new leaf development emerging from the crown. Boron applications are being applied, either as a foliar application or through the drip system. Remember, we are looking to apply 1/8 lb. of boron per acre. Over application of boron can be phytotoxic and detrimental to the plants. Plans are also being made to begin fertigation applications later this month to aim for the first pick in early April. The initial target is to apply 5.25 lbs. N per acre. After the first application, a tissue test should be taken to refine fertility recommendations further. Please also remember we have the drip fertigation calculator to make the calculations more straightforward. Brassica transplants are going in the ground this week and are looking good. The pruning of peaches and perennial fruit is pretty much complete, and we await the arrival of spring.”