Sweet Chelsea |

My thriving cucumber season came to an abrupt halt a couple of weeks ago. It started when a strong windstorm knocked over a cage of ‘Amiga’ cucumbers and uprooted the plants completely. All my other cages were staked so I can’t explain why this one was not but anytime you grow anything on a tomato cage, don’t forget to stake it!

Strong winds uprooted a cage of cucumbers but luckily did not damage the adjacent planting of ‘Zeebest’ okra

I was disappointed but not surprised to find evidence of root-knot nematodes on the roots (see photo). Though my plants had been producing well throughout June and early July I had begun to notice pale green leaves, misshapen fruit, reduced yields and general wilting, all signs of nematodes infestation.

Root-knot nematodes are microscopic but a heavy infestation on the roots is easily visible as swollen galls within the roots

Nematodes are soil-dwelling, microscopic, worm-like parasites that feed on plant roots, causing swelling or galls within the roots, impeding the flow of water and nutrients. They are most active in summer when soil temperature ranges between 85 and 95°F. Cucumbers, okra, squash, beans and non-resistant tomatoes are especially susceptible. Because nematodes are most active at higher temperatures they are not a serious threat to most cool season plants, the exception being carrots and beets which can have severe damage. Alliums and sweet corn are not affected by nematodes.

Most cool-season crops are not affected by nematodes but beets and carrots are an exception

Because nematodes can devastate a crop it’s important to take action if you discover them in your garden. Below are a few earth-friendly methods for battling nematodes; you may never completely eliminate nematodes but the following methods will help keep their numbers in check so that damage will be kept to a minimum. Note that nematodes can be spread by tools and soil so be sure to clean and disinfect tools after working in soil that contains nematodes, also be careful not to fling soil from infected roots to adjacent parts of the garden.

Summer Fallow: Nematodes are most active in warm soils and they need water to thrive so take advantage of summer’s heat to wither them away. Withhold water from nematode infested areas of the garden and turn or till the soil every 7-10 days during the summer to expose nematodes to the drying effects of the sun.

Crop Rotation: Plant nematode susceptible crops where non-host crops such as onions, garlic and sweet corn were previously grown.

Plant Nematode Resistant Crops: If your garden is too small for crop rotation look for plants that are bred to have nematode resistance. A tomato labeled with “VFN” indicates disease resistance: V= resistance to Verticillium wilt; F = resistance to Fusarium wilt; N = resistance to root-knot nematode resistance. Resistance doesn’t mean they won’t get nematodes but they are able to resist them enough to produce a harvest. Resistant tomato varieties include ‘Better Boy’, ‘Tycoon’, ‘Celebrity’, ‘Big Beef’, ‘Lemon Boy’, ‘Sweet Chelsea’ and ‘Supersweet 100’.

French Marigolds and ‘Pacific Gold’ mustard can be used as cover crops to reduce nematode infestation

Plant Nematode Suppressive Crops: Certain types of marigolds (Tagetes patula) work by excreting a substance that is damaging to nematodes as well as trapping them in their roots and preventing reproduction. The key is to plant the entire area as a cover crop and leave it in place for several weeks to reduce nematode populations. A late summer planting of French marigolds can be left in place right up to the first frost; effective varieties include ‘Tangerine’, ‘Petite Harmony’, ‘Petite Gold’ and ‘Janie’. At the end of the season remove the tops and turn under the roots. Elbon rye is an effective nematode control that can be planted as a cool-season cover crop that is turned under in early spring. Cut down or weed-whack the tops a couple of times during the growing season and either leave the tops in place as mulch or add them to the compost pile. ‘Pacific Gold’ mustard, also sold as Mighty Mustard®, contains high levels of compounds called glucosinolates that help suppress nematode populations. Cut down mustard before it sets seeds, add the tops to the compost pile and leave the roots to decompose in the soil. Both Elbon rye and ‘Pacific Gold’ mustard are available from Johnny’s Seeds (www.johnnyseeds.com).

Cut down or weed-whack cereal rye a couple of times during the growing season

Biological Control: In 2010, Dr. Kevin Steddom, a plant pathologist with Texas AgriLife Extension, conducted a trial at the AgriLife Research Station in Overton comparing several products for nematode control. He found that of all the products he tested, which included two soil fumigants, a biological fungicide called Actinovate was the most effective in lowering nematode populations. A 2-ounce packet sells for $18-20 but you only need ½ teaspoon per gallon and it can also be use for powdery mildew, black spot, early blight and other fungal diseases.

Secure clear plastic over very moist soil to create a greenhouse effect that will raise soil temperatures enough to kill nematodes.

Soil Solarization: Rake the soil so it is level and smooth, water well and cover with clear, UV resistant plastic (2-4 ml thick). Pull the plastic taut across the soil and secure or bury the edges with soil. Leave in place for 4-6 weeks, patching any holes with duct tape so heat cannot escape. This is often considered a last resort because the heat generated under the plastic kills everything, good and bad. It’s important to add organic matter at the end of the process; after removing the plastic do not work the soil for couple of weeks then top with a 2-3 inch layer of compost and water well before planting.

I share these posts on Our SimpleHomestead Blog Hop. Be sure to stop by. The “hop” has tons of great information from gardeners and homesteaders all over the world!

I am truly blessed to be able to call many of the top horticulturists in the country friend. My work at A&M has exposed me to so many people that are truly experts in their fields of study. I call these people “Masters of Horticulture”. I started this blog because I was so inspired by these experts and all they were teaching me that I wanted to be able to document it and share it with others.

Today’s guest author, William (Bill) D. Adams, is one of these Masters of Horticulture. He and I became aquainted through a theater group we both support. Soon after we met, Bill read a little article that I had written for Hort Update. He encouraged me to write more and even acted as my sponsor for the Garden Writer’s Association. The rest as they say is history.

Bill spent 31 years honing his craft as an extension specialist in Harris County. Upon retirement he set out to learn everything there was to know about the tomato. His efforts have resulted in the publication of the “Texas Tomato Lover’s Handbook“. This best selling, comprehensive work tells you everything you need to know so you can grow the best tomatoes possible in the difficult and unpredictable Texas climate. As you will see when you read his book, Bill’s extensive research (which means growing EVERY tomato he mentions) has made him the UNDISPUTED tomato king of Texas. Because of this, I am thrilled to share this article about the best tomatoes for your Texas garden from the King himself. Enjoy!

Five Must Grow Tomatoes by William D. Adams

Tomato varieties come and go but the ones with great flavor, a juicy, melting flesh and healthy, easy-to-grow vines are the ones we treasure. Narrowing the list to five is almost impossible for a true tomato lover so forgive me if I throw in a few alternates.

Medium to medium-large slicer—a tomato that will make you burger zing, your BLT complete and your neighbors envious. Champion Hybrid is still at the top in this category but you could make do with Celebrity, Talladega or Tycoon. Any of these tomato varieties makes the grade when it comes to nice acidity (though not just sour), complex sweet tomato flavors and a melting to firm flesh (no grainy or brick hard tomatoes in this bunch).

Here is a pic of Bill in his 2010 trial garden. He grew, tested, compared and documented 89 varieties that year!

Medium size and so scrumptious you will lick the juice from the plate. Momotaro, a Japanese pink tomato was the hit of the tomato patch in 2010 (one of eighty nine varieties in the authors test garden-only tried about 50 varieties in 2011). This tomato had acidity, sweet tomato flavor and a wonderful melting texture. It’s as good as any heirloom with less cracking and more production.

Persimmon is an heirloom that my wife Debbi insists I grow every year. It is a big, orangery-red, persimmon colored tomato that will lap over a burger. Total yield isn’t that great but we don’t care. This year we are growing it grafted on hybrid rootstock to see if we can produce more of these delicious beauties.

Plant one of the Black tomatoes or a yellow, green or white one just to be different. The black tomatoes—often referred to Black Russian tomatoes are very tasty—they are often described as “having Smokey undertones”. They also have some acid zip and a depth of flavor that the most accomplished wine connoisseur will be challenged to describe. Recent favorites include Cherokee Purple, Black from Tula and Black Sea Man. The plum-shaped Nyagous has been a hit in previous years. Green Zebra is refreshing, Flamme is an orange “golf ball” with lip smacking flavor and Snow White cherry is sweet and mild (best when pale yellow).

Cherry tomatoes are typically delicious but one of the best is Sweet Chelsea. Sweet 100, Sweet Million, Rite Bite, BHN 624, Sun Cherry and Sungold will also wake up your taste buds. Don’t set out too many cherries or you’ll be picking fruit every night until dark.