Showing posts with label pests. Show all posts
Showing posts with label pests. Show all posts

Tuesday, September 4, 2012

Cool Companions.




It's September. And I swear, South Carolina is hotter now than in July. Yesterday, as I sprinted from the car to the grocery store through a downpour, I thought, ”Well, at least it will be a little cooler when this nasty weather lets up.” Instead, as I exited Publix, I hit a wall of heat and humidity so dense that I could barely breathe.

Seriously. I gasped for breath while loading bags into the car. And my hair looked lovely from the rain and humidity.

Today isn't much better. Our windows sport rivulets of water, the clash between outside heat and inside AC.

Thank goodness for AC.

So, although it's hard to get excited about planting a fall garden in a sauna, I'm forging ahead. 


Seeds that I planted last week are sprouting, but I'm a bit concerned about the lettuce. While I placed the trays of seeds on a shady greenhouse shelf, I fear that the intense heat cooked the seeds. I've moved the trays out of the greenhouse and plan to watch them for a few days, because lettuce sprouts pretty quickly. Otherwise, it's back to the trays to reseed. All ten varieties.

Yeesh.

Whether your fall garden will include seeds you started using this guide, or if you decide to purchase transplants or direct seed, you need a plan.


How will you organize your garden? And how will you prevent pests from snacking on your crops?

Why, you'll embrace companion planting, of course.

Many people think of organic gardening as simply the avoidance of chemicals—or the use of OMRI approved chemicals—in the garden. However, companion planting is a main premise in organic gardening.

Companion planting involves growing different species of plants together to benefit one or both. Rather than planting a monoculture, mixed plantings attract beneficial insects, deter pests, and boost soil health to produce better harvests.

For instance, aromatic herbs like rosemary mask the scent of a crop from pests. Some plants, like mint, produce odors that deter or confuse pests. Other plants, like parsley, serve as a trap crop, drawing insects away from the main crop. Strategic companion planting can aid in pollination, with plants providing food to sustain beneficial insects. Companion plants can also create a habitat for predatory insects that feed on pests.

I often use companion planting in the spring and summer gardens, and probably one of the most widely-known pairings is basil grown with tomatoes. This summer, though, I tried a new companion planting: icicle radishes planted among squash to combat squash vine borers. After losing all of the squash plants last year, I was skeptical.

Guess what? I'm still harvesting squash.

Needless to say, I'm a believer in companion planting!

Based on the summer success, I'm planning our fall gardens to include companions. Cool weather crops can benefit from strategic, well-designed companion plantings, particularly as many of the cool crops belong to the same family: brassica.


And cabbage worms love brassica.


Cabbage worms are sneaky. And destructive. And very difficult to locate. Companion plantings help deter these nasty creatures. (But still, we need to be vigilant. Check the undersides of leaves and stems regularly.)

To save you a bit of time when planning your fall garden, I've compiled a list of cool weather crops and good companions to plant along with them:

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Crop Companion Notes
Beets Onions, kohlrabi, lettuce, cabbage, garlic, mint Garlic improves growth and flavor. Mint attracts beneficial insects.
Broccoli Aromatic plants, dill, celery, chamomile, sage, peppermint, rosemary, potatoes, beets, onion Aromatic plants deter cabbage aphids, cabbage worms, flea beetles. Celery, onions, and potatoes improve broccoli's flavor.
Brussels Sprouts Aromatic plants, celery, dill, chamomile, sage, mint, rosemary, hyssop, thyme, wormwood, onions, potatoes Aromatic plants deter cabbage worm, cabbage aphids, cabbage whitefly.
Cabbage Aromatic plants, celery, dill, chamomile, sage, mint, rosemary, hyssop, thyme, wormwood, onions, potatoes Aromatic plants deter cabbage worm. Sage repels cabbage flies, cabbage looper, cabbage maggot. Chamomile and dill improve growth and flavor of cabbage.
Carrots Chives, onions, leeks, parsley, aromatic plants, rosemary, wormwood, sage Parsley repels carrot fly. Wormwood planted around border repels animals. Chives improve growth and flavor.
Cauliflower Celery Deters white cabbage butterfly, cabbage worm.
Fruit trees Chives Plant around base of fruit trees to discourage insects from climbing trees.
Kale Cabbage, potatoes, aromatic plants Aromatic plants repel cabbage fly, cabbage worms
Kohlrabi Onions, leeks, aromatic plants Aromatic plants repel flea beetle, cabbage root fly, aphids
Leeks Celery, onions, carrots Celery improves growth and flavor. Leeks repel carrot fly.
Lettuce Onions, strawberries, carrots, radishes, aromatic plants Onions and aromatic herbs deter slugs.
Onions Cabbage, beets, strawberries, lettuce, chamomile Do not plant with peas or beans. Chamomile improves growth and flavor.
Peas Carrots, turnips, radishes, mint Do not plant with onions or garlic. Mint improves health and flavor.
Radishes Beets, spinach, kohlrabi, lettuce Lettuce makes radishes more tender.
Spinach Strawberries, peas Peas provide shade for spinach.
Swiss Chard Beans, cabbage, onions Aromatic plants repel beet leaf miner. Chard grown near companion helps keep moisture in soil.


Additionally, several aromatic herbs provide a wide variety of benefits as companion plants:

Chamomile: Improves the growth and flavor of cabbage, deters pests.
Chives: Improves growth and flavor of carrots, deters pests.
Garlic: Prevent borers of fruit trees.
Hyssop: Increases yield of grape vines, lures away cabbage butterfly. Bees are attracted to hyssop, but many pests are repelled by it.
Mint: Improves health and flavor of cabbage, deters white cabbage worm by repelling egg-laying butterflies. Spearmint repels ants and helps deter aphids. NOTE: Mint can be very invasive! Plant in a container to include in the garden.
Oregano: Repels cabbage butterfly.
Rosemary: Deters bean beetle, cabbage moth, carrot fly.
Sage: Repels cabbage flies, carrot flies, black flea beetle, cabbage looper, cabbage maggot.
Thyme: Deters cabbage worm, white fly.
Wormwood: Repels animals in the garden when used as a border. Repels moths, flea beetles, and cabbageworm butterfly.

So, now we're ready. With our companion planting table in hand, we can plan our best fall gardens.

And hopefully, we'll spend more time planning delicious dinners than culling cabbage worms.

Now, if only the weather would cooperate...

Happy gardening!

XO ~

Julie

Reposted to Farm Girl Friday Blog Fest.


Wednesday, November 3, 2010

The battle.


You plant. You water. You nurture. And when you're about to harvest, you find that the lovely lettuce you were craving for lunch is riddled with holes--eaten by a freeloader.

It's aggravating. It's irritating. If you garden with kids, factor in their disappointment, and truly—it's downright criminal.

So, what can you do to ensure that you reap the rewards of your gardening efforts?

The key to a successful, healthy garden is...

...vigilance.

Honestly, gardening is not for the faint of heart. You need to get down on your knees, turn over leaves, and look for the little nasties that can decimate your crops. A quick perusal of the garden isn't good enough—pests camouflage well for a reason, hoping they'll find a lazy gardener so they can feast to their hearts' content.

Trust me. I know.

Since most gardeners focus on summer crops, there seems to be better awareness of the interlopers that snack on tomatoes, squash, and corn. But with the increasing number of us who are trying our hands at fall and winter gardens, we need to know what foes we face in our battle for food.

(Dramatic pause.)

To help you identify what might be munching on your crops, I'm shamelessly borrowing a few images from the Clemson Extension website, with credit cited for the terrific photos. When you have a few free moments, which I know seems like an oxymoron, please take a look at the fantastic information on the Clemson site.  http://www.clemson.edu/extension/hgic (I'm a Master Gardener, and I visit it several times a month—it's a wonderful resource.)

For most of these pests, it's best to hand-pick them from the plants. (Truly, my 9-year-old daughter loves this task.)

Then, it's time to decimate them.

The means of their demise depends on your sensitivity and squeamishness. Poison? Not an option. Not only are you likely killing innocent beneficial insects, but you want to eat the lettuce, not glow from it. Squishing is quick and effective—but it's high on my “ick” factor. I typically drown pests in a bucket of soapy water. My daughter likes to throw them in the river behind our house to see what fish will eat them. Of course, for a serious infestation, there are plenty of organic pest controls on the market. Neem oil and insecticidal soap are good options—but read the labels carefully. I leave the decision to you.

Remember—not only are these pests masters of disguise...many are also tiny. Look carefully, and look often at your plants.

Without further ado, here are the villains of the fall/winter garden:

Cabbage Looper

David Cappaert, Michigan State University, www.insectimages.org

Look for pin-head sized eggs on the underside of leaves. When the larvae hatch, they are almost translucent but quickly become green as they grow, with white lengthwise stripes. The young larvae begin eating on the underside of the leaves. As they grow, they will move to the center of the leaves, eating between the veins. At maturity, they will be approximately 1-1/2 inches, and they move much like an inch worm.

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Cabbage Webworm

Alton N. Sparks, Jr., University of Georgia, www.insectimages.org

Look for eggs on the underside of leaves in the angle along the leaf stems.

Larval webworms are about ½ inch long when mature. They're grayish yellow and marked with five brownish-purple lengthwise stripes. Their heads are black and bear a V-shaped mark.

When they first hatch, larvae feed on either side of the partly folded leaves of the plant buds. After a few days, they begin to feed beneath a protective web made from silk-like threads that they form. Sometimes the larvae are found on the outer leaves or in the angle between the main plant stalk and the leaf. They can be detected by debris and webs at the point of feeding.

Cabbage webworms tunnel into and kill the buds of young plants.

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Cross-Striped Cabbage Worm

Clemson University USDA Cooperative Extension Slide Series, www.insectimages.org
 
Look for light yellow, semi-transparent eggs in clusters of 20 to 30 on the undersides of leaves.

When first hatched, the larvae are gray. At maturity, they are about 3/5 inch long and have numerous horizontal black stripes across bluish-gray backs. Along each side of the back is a longitudinal black stripe and below that, a bright yellow stripe. The underside of the body is light green, mottled with yellow.

Cross-striped cabbageworms prefer the tender terminal buds and the heads of cole crop plants. Look for plants riddled with holes.

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Diamondback Moth Caterpillars

Russ Ottens, University of Georgia, www.insectimages.org

Look for single eggs or groups of two or three on the leaves. Eggs are small, nearly round and yellowish white.

The larvae are light green and pointed at each end, with tiny black hairs covering their bodies. They are about 1/3 inch long when mature and wiggle rapidly when disturbed, often dropping from the plant and hanging by silk-like threads. The larvae feed on all parts of the plant but prefer areas near the bud of a young plant, crevices between loose leaves of a firm head, and the undersides of wrapper leaves. Their feeding may disfigure the bud of a young plant.

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Imported Cabbageworm

Merle Shepard, Gerald R. Carner, and P.A.C. Ooi, Insects and their Natural Enemies Associated with Vegetables and Soybean in Southeast Asia, www.insectimages.org

Look for single eggs on either side of the leaves. Eggs are yellow, oblong, bluntly pointed at the ends, deeply ridged lengthwise, and attached to the leaf by one end.

Larvae are velvety green with a narrow orange stripe down the middle of the back and a yellowish stripe along each side of the body. When mature, larvae are about 1¼ inches long. Larvae are sluggish when disturbed.

Imported cabbageworms feed near the center of plants and do more damage to the cabbage head. They chew through leaves indiscriminately.

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Aphids

Whitney Cranshaw, Colorado State University, www.insectimages.org

Plants in all stages of growth can be covered with dense clusters of whitish-green aphids (plant lice.) Each aphid is the size of a pinhead. Aphids suck plant sap from the leaf, causing the leaves to curl and crinkle or form cups, completely lined with the aphids. In severe infestations, the plants wilt and die. The plants, if not killed, are dwarfed, grow slowly and form small, light heads.

To control aphids organically, spray Neem oil or insecticidal soap on the leaves. Make certain to coat both sides of the leaves, as well as spray in between any curled leaves.
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There you have it, my gardening friends, the “Wanted” posters for our kitchen garden enemies. I hope you win your battle against these foes and taste sweet victory in your  lettuce, cabbage, and broccoli.

To the victor goes the spoils! Enjoy!