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Posts Tagged ‘UC IPM’

Calendula Biodiversity Companion Plant Sage Strawberry Chard

Beautiful biodiversity! Calendula – yellow, Pineapple Sage – red, Strawberries, Scarlet Chard in back.

Calendula is a terrific January on herb that brightens SoCal Gardens most of the year though they do prefer cool weather and tolerate frost. Yellow, orange, white or bicolor! Spiffy green, green leaves! One blogger refers to them as Sunshine Incarnate! Aka Pot, English or Poet’s Marigold ~ Calendula Officinalis, not to be confused with the Tagetes Marigolds used for Nematode suppression. See the Tagetes details

Be ready to give them some room! They grow up to 2′ tall and can take up a good 3′ footprint, plus they self seed, given time will spread if you let them. Plant well back from narrow pathways, or soon you won’t be able to get through!

Calendula Frost Pilgrim Terrace Community GardenIt’s easy to grow. If you still have plants from last year, gather seeds, drop them here and there in well drained areas when soil temperatures reach 60 degrees or after last frosts. Cover with about a 1/4″ of soil, and the ones that like that spot will grow themselves! Or transplant babies. They aren’t too picky about their soil and are cold hardy to 25 degrees. Scorching heat is not good, so plant sooner or later. They do great in containers! Put them in accent places or where you can see them a lot of the time!

Remove browning lower leaves to keep them looking fresh and let air circulate. They are susceptible to mildew. Deadhead to keep getting flowers!

GARDEN WORKHORSE COMPANION PLANT

Most insects avoid the plants, which is in keeping with one of its old uses as the basis for insect sprays, contains pyrethrum. The idea of brewing up calendula tea from the plants’ flowers and leaves, and using it as an insecticidal spray, is getting renewed attention based on several recent studies. In Poland, growing calendulas among cabbage resulted in fewer problems with aphids, cabbage worms, and diamondback moths. A recent study in India showed that calendula extract reduced feeding by tobacco cutworms.

The Mexican beetle avoids Bean rows that have Marigold/Calendula growing among them. Calendula repels a number of unwanted soil nematodes and asparagus beetles, but may attract slugs. Plant Calendula with tomatoes and asparagus. Calendula attracts a wide range of pollinators because it provides nectar over the whole growing season.

It is a super trap crop for aphids, whiteflies, and thrips because it exudes a sticky sap that they find more appealing and delicious than nearby crops.

Calendula flowers attract pollinator bees and butterflies! The nectar–along with the pests that it traps–attracts beneficial insects such as ladybugs, hoverflies, and lacewings. Black flies that are attracted are followed by predatory hoverflies that feast on insect pests.

Calendulas also benefit the garden below ground, where they form partnerships with soil-borne fungi that turn the plants into soil-cleaning machines. In China and the USA, calendula has been found to be useful in the restoration of soil contaminated with high levels of cadmium. In Columbia and Spain, cover crops of calendula were found to suppress root-knot nematodes.

Calendula is an excellent multi-functional plant for permaculture fruit tree guilds.

Calendula grows thick and makes a great cover crop. Seed an area, let it grow, turn it under.

Plant Calendula right in the middle of things, between, next to any plant you want to help!

PESTS & DISEASES

Pests are Aphids, snails, slugs, whiteflies and the cabbage looper. Wash away aphids, remove infested leaves if necessary. Use a vinegar solution to kill them. Toss some organic snail/slug bait around two or three times to remove generations of snails. Where there are holes in the leaves, seek and remove loopers.

The disease is Powdery mildew. No Overhead watering. Mildew can be a problem on a plant you have pinched back to get dense bushy foliage with little air circulation. Best to prevent mildew by including it in your baking soda applications. UC IPM Powdery mildew  UC IPM Calendula

SEEDSAVING

Herb Calendula Seed HeadsCalendula seeds have personality! No two are alike. Saving them is simple! Let them dry on the plant for the most nutrition the mother plant can give them. Select plants with the color you want. Hold a bag underneath the dried flower head, gently break off the seeds. If the seeds don’t want to break off easily, let them dry a little longer. Lay them out in a dry place for two to three days to dry completely off the plant.

Gather enough for yourself and to share as gifts or package up for your local Seed Swap! Label your packet, store in a dry cool dark place.


HYPO-ALLERGENIC MEDICINAL

An account, written in 1699, states “The yellow leaves of the flowers are dried and kept throughout Dutchland against winter to put into broths, physicall potions and for divers other purposes, in such quantity that in some Grocers or Spicesellers are to be found barrels filled with them and retailed by the penny or less, insomuch that no broths are well made without dried Marigold.” Marigold is another name for Calendula.

Calendula Infused Oil Hypo-allergenic MedicinalMedicinal, of course, depends on whether you like doing that with your plants. I’m not too patient about building my own remedies, though one of these days I might do it. I know Calendula from tubes of goo I buy at the health food store. It’s a natural remedy for skin ailments, minor cuts and burns, sunburn, insect bites, diaper rash, dandruff! Use for skin and tummy ailments with dogs, horses, and cows, ear mites in doggies.

Sore throat? It doesn’t matter whether it is viral or bacterial infection because Calendula is effective against both! Gargle your tea 2-3 times a day or sip warm calendula tea slowly to get immediate relief. For children, mix honey with the tea and give spoonfuls of it several times a day.

Calendula infused oil Recipe by Ashley

It increases blood flow to the skin cells, provides antioxidant protection that reduces the appearance of wrinkles and age spots, and even the visibility of scars. Calendula tea is great!

The easiest way to make the tea is to put about a tablespoon of dried calendula flowers in a heat proof mug and pour boiling water over them. Cover with a saucer and let steep for around 15 to 20 minutes.

It has antibacterial properties that make it good in toothpastes, mouthwashes, soaps, and shampoos. It is very effective in killing bacteria that cause everything from gingivitis to cavities. Research has shown that calendula has antioxidant compounds that directly impact your vision, helps prevent macular degeneration and the development of cataracts. Calendula can significantly reduce inflammation discomfort from a cough, joint pain, upset tummy. Add some calendula oil to your skin balm.

If you need a lot of flowers for your remedies, fertilizers high in phosphorus help. Jamaican bat guano is great, but needs to be added to your soil 4 months in advance of planting so it has time to break down for your plant to uptake. Plant densely and deadhead.

Warning: Some people have allergic reactions to high doses of calendula oil. Consult a trained herbalist or medical professional to avoid any major side effects.

EDIBLE LANDSCAPING – COOKING WITH CALENDULA!

Petals of single flowered varieties have better flavor! It’s spicy leaves and flowers are added to soups, sprinkled on salads, used as garnishes, in salsas, burritos, scrambled eggs, and frittatas! The yellow pigment of the flowers is used in place of saffron, in fact is called ‘Poor man’s saffron.’ It is tasty good looking in quiche, cake frosting, rice, butter, in or on cream cheese! Add to bread, syrups and conserves. You can dry the flowers and leaves for longer storage, to make winter tea and tonics.

There are tons of calendula varieties with different flower shapes, color combos, dwarfs for containers and borders, single to multi heads! Prince is heat resistant. Pacific Beauty is heat tolerant, has long stems for cutting!

Orange Calendula Flower at Pilgrim Terrace Community Garden
Orange Calendula Flower at Pilgrim Terrace Community Garden, Santa Barbara CA

We are charmed by its beauty and it serves us well. Thank you dear plant.

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The Green Bean Connection started as correspondence for the Santa Barbara CA USA Pilgrim Terrace Community Garden. All three of Santa Barbara city’s community gardens are very coastal. During late spring/summer we are often in a fog belt/marine layer most years, locally referred to as the May grays, June glooms and August fogusts. Keep that in mind compared to the microclimate niche where your veggie garden is. Bless you for being such a wonderful Earth Steward!

Love your Mother! Plant bird & bee food! Think grey water! Grow organic!

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Bagrada Bug Stages
California, Nevada, Arizona, New Mexico, Texas gardeners alert!

June 2016 note: We were so fortunate last summer. We had hot weather but not for an extended time, so no Bagradas. The word from hot San Diego community gardens is they are simply not allowed to plant any Brassicas.

The extended Santa Barbara area hot spell at the end of August 2014 brought Bagrada Bugs. Ugh. They were sighted on radish, broccoli and kale at Pilgrim Terrace Community Garden. Bagradas thrive at sustained temps 85 degrees and above. They are small, less than a 1/4 inch length, but deadly. Other than seeing them, the first sign is your plant leaves have whitened areas at the leaf edges and the leaf starts to wilt.

Per Wikipedia, Bagrada Bugs are native to much of eastern and southern Africa and parts of southern Europe and Asia. They made a sudden appearance in Los Angeles in June, 2008, its first sighting in the Western Hemisphere. It then moved into the cropland of the heavily agricultural Coachella and Imperial Valleys of California, doing damage to cole crops there, especially those grown organically. As of September 2014 it has reached as far north as San Mateo, Santa Cruz, Merced and Inyo counties, and all California counties to the south except Tulare County.

Although spiders and other general predators may feed on the Bagrada bug, it does not have specific natural enemies in the United States. Birds don’t eat these nasty stink bugs.

The only effective substance, so far, that kills them, is one you have to have a license to use.

Brassicas are their favorite food, and Brassicas, that’s broccoli, cauliflower, collards, kales, Brussels Sprouts, cabbages, are THE SoCal winter garden plant! Last year, late summer, they also infested our tomato and pepper plants.

  • Per UC IPM, as an alternative to greenhouses, screened tunnels or floating row cover fabric can provide plant protection in gardens. The mesh of the screening material must be fine enough to exclude the Bagrada bug nymphs and should be elevated so that it does not touch the plants because the bugs can feed through these coverings. The edges of protective covers must also be buried to prevent the bugs from crawling underneath to the plants, and they must be applied before Bagrada bugs get into the crop and soil.
  • If you are planting Brassicas from seed, immediately securely cover with a floating row cover or the baby plants will be eaten.
  • Some gardeners plant mustard and radish as trap plants, the Bugs go there first. But, believe me, they quickly mow those and it’s on to your other Brassicas and more! The big CON of trap plants is they BRING Bagradas! The best course of action, to prevent egg laying and further infestation, this year and next, is to harvest, then remove any Cruciferous plants – mustard types, radish, all Brassicas, until the weather cools. Then, plant whatever you want!

Insect - Bagrada Bug infestation on Bell Peppers
Bagrada Bug infestation on Bell Peppers

Removing Bagradas from your plants just isn’t feasible. Not only do they move FAST and instantly drop to the ground when the plant is disturbed, but are fast growers and reproducers. They make virtual swarms, and when they suck juices from your plant, toxic disease producing stuff gets in your plant. In hot temps, I’ve seen a 1 1/2 foot tall plant go down in 1 to 3 days. White patches start on the leaves, they wilt and the plant dies.

PLEASE Remove infested or diseased plants immediately. You can’t even sneak up on Bagradas to cover the plant with a plastic bag. The moment the plant is disturbed, the bugs instantly drop to the ground, skittering off in the blink of an eye. Squish or stomp any bugs you see. DO NOT lay the leaves or trim of infested plants on the ground. Bagradas lay eggs both on your plant and in the ground. Eggs you might not see, hatch quickly, defeating your clipping. If possible, securely tie plant and bugs in a plastic bag so they can’t escape, and take them to the TRASH. Do not put them in compost or green waste.

Simply shaking Bagradas off doesn’t work. They also fly. When you try to remove them, they are expert at playing dead, and once you are gone, quite quickly climb back up on the plant. I’ve seen it. Stand very still and wait…sure enough, there they come. That’s your second chance to remove, euphemism for kill, them. But, like I say, better to immediately harvest anything you can, then remove the plant.

Don’t lay down mulch; do REMOVE mulch habitat from around infested or susceptible plants until the Bagrada season is OVER. They hide out in mulch, mate like crazy, lay eggs in the ground.

The sooner you remove infested diseased plants and mulch habitat, the fewer eggs will be laid in your soil, the fewer Bagrada Bugs you will have next year if we have another sustained period of high temps.

PLANTING TIPS

  • I highly suggest biodiversity, interplanting – that’s mixing it up, even interplanting different varieties of the same plant (especially broccoli), rather than monoculturing – a row of a single kind of plant. With rows of a single plant, the pest or disease simply goes plant to plant and you lose the whole row. This also stops leafminers (typical on overwatered soft leaved chard & beets) from going plant to plant. Slows them way down.
  • Plant so mature plant leaves don’t touch! Stop the ease of transmission. If you can’t help yourself, and go monoculture or plant too close, thin out plants as they mature, clip back, harvest the between leaves so they don’t touch. More is not always better. Dense plantings can literally starve plants that get root bound, that have less access to a healthy allotment of soil food and soil organisms that tickle their roots. Jammed together leaves are not able to get the sun power they need, so there are smaller leaves and less and smaller fruits. Slugs and snails successfully hide out. Mildew and leaf miners spread easily and can ruin the crop. There are so many reasons to give your plants ample space to live and breathe.
  • Unfortunately, Brassicas don’t mingle with mycorrhizae fungi. With other plants the fungi network linking your plants is proven that when one plant gets a disease or pest, it warns the neighbor plant. That plant then boosts its own defenses! No such luck with Brassicas.
  • Wait to plant your Brassicas from transplants in October when the weather has cooled.

Here is the link to some additional really excellent information at UC IPM (Integrated Pest Management) published Jan 2014. Read it very carefully.

You have choices!

  1. For now, plant what Bagradas don’t care for. Wait until the weather cools, plant Brassicas from transplants in October. Greens are super healthy ~ just don’t plant cruciferous plants (plants with four-petal flowers/cross) like Mizuna, mustard or turnips. Better not to get those mixed mesclun 6 packs at this time.
  2. Take a chance, mix it up! Plant a few Brassicas/mustard/radishes here and there now. If these plantings fail, plant another round when conditions have changed. Succession plantings are a wise gardener technique!
  3. Don’t plant over winter; rest your soil, or plant soil restoring cover crops!

Keep a good watch. Steady yourself. Make calm decisions. What you do is especially important if you have neighbor gardeners who have plants that may become infested.



9.1.2014 Post revised and updated from experience 

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