Lifestyle

Gardening: In the right company

THERE is a particular allure in the notion of companion planting.

Through years of gardening and plant husbandry, the magical life of plants is slowly being revealed to me. Some plants have preferred bedfellows, while others work to repel or attract insect companions.

Some theories are untested, some have undergone serious and scientific trials. But who can say the experience and observations of generations of gardeners should be ignored?

>>More Lifestyle stories

Marigold is recognised by home gardeners and scientists as a natural tool in the pest control arsenal as a potent defence against nematodes, or eel worms.

Nematodes are tiny, clear worms a few millimetres long.

Some species of nematode attack the roots of desirable plants, causing distortions and affecting the vigour of the plant.

Marigold roots exude phytochemicals to counteract the pest - all the action happens quietly underground.

Although many companion plants remain untested, various types of marigold have undergone scientific field trials.

Once flowering, the marigolds are cultivated back into the soil as a crop rotation.

The results are impressive. Tagetes patula 'Single Gold' topped a Dutch trial with 99 per cent of nematodes controlled.

Burpee Seeds in the United States have so much faith in the ability of this humble flower that they've named it 'Marigold Nema-gone'.

Most gardeners aren't in the habit of chopping up their marigolds and digging them back into the soil, but it makes sense to put in plenty around plants susceptible to nematode damage, such as brassicas, carrots and parsnips.

If you do have serious problems caused by nematodes you could follow the Dutch example and sow a crop of marigolds, then dig them in once they're flowering.

Another well-tested theory is to plant rows of carrots and onions together. This one makes complete sense. The smell of the onions disguises the smell of the carrots from the carrot rust fly.

The carrot smell also disguises the onion from onion fly.

A well known triplicity is called the Three Sisters - corn, climbing beans, and pumpkin or squash.

The corn provides structure for the bean to grow up and the pumpkin scrambles over the ground shading the soil from the hot sun. Each of the plants has its own niche.

Native Americans developed the system because it provided a balanced diet from a single plot of land.

Some plants are bad companions.

Potatoes are no good near tomatoes as they are in the same family and share diseases. They are also likely to fight over similar nutrients in the soil, such as potassium.

Other plants are okay to grow at a distance, such as along a border.

Fennel exudes a chemical from its roots which is allelopathic, in other words it inhibits the growth of plants growing near it.

 But the fennel flowers are good, as they attract predatory insects which will provide a volunteer army to deal to pests on your behalf.

Fennel is also good to plant near dog kennels, as it repels fleas.

Dill, coriander, carrot, angelica and parsley all have similar umbel-shaped flowers loved by beneficial predator insects, so grow these plants and allow them to set flower and seed in your garden.

Other excellent plants to attract good insects are purple-flowering phacelia, borage, clover, chives and comfrey, yellow tansy or 'Bachelor's Button', and delicate white alyssum and chrysanthemum.

As long as you have plenty of flowers in and around your garden you will be providing habitat and nectar for a diverse range of insects.

Keep a diary on what has worked or not worked so you can hone your observations for future reference.

The aim is for a balanced garden which is not overburdened by pests, and where spraying is a thing of the past.

 

Good and ugly

  • Hover flies: The young larvae of some species are voracious carnivores and will eat small soft-bodied insects such as aphids, some chewing through as many as 40 aphids a day. Hoverflies are very cool insects and fun to spot. They look like a cross between a honeybee and a fly but unlike bees they have two wings, not four. They fly in distinct right-angled flight paths and can hover in one spot. Trials have proved that fields of canola planted with adjacent strips of purple-flowering Phacelia increased numbers of hoverfly, which in turn greatly reduced aphid populations.
  • The same goes for red ladybirds. Their babies are ugly devils, with appetites to match and will chew through aphids as if they were juicy grapes.
  • Wasps: Bigger wasps will eat a caterpillar for breakfast. Smaller wasps will lay their eggs on a caterpillar and the horror show begins as the caterpillar is slowly eaten from the inside out.The same goes for the tiny wasps which parasitise aphids and whitefly. If you see some aphids which aren't moving and look mummified, leave them on the leaf.  They are likely to be host to wasp pupae and you will have plenty more fighters to do your dirty work for you.

Resources

Plants for beneficial insects: Kings seeds sells a Beneficial Insect Blend. Visit kingsseeds.co.nz

Also visit farmerfred.com/plants_that_attract_benefi.html

In the glasshouse: Tiny parasitic wasps are available to purchase (by the 1000) from bioforce.net.nz

Home gardener's observations: The book, Companion Planting in New Zealand by Brenda Little, is worth reading. Available from touchwoodbooks.co.nz

Topics:  gardening




Appeal court may have to rule on live-baiting case

Demonstrators gather in protest to the New South Wales Government's proposed ban to end greyhound racing in Sydney on Tuesday, Aug. 2, 2016. The NSW Government has decided to shut down the greyhound racing in the state from July 1, 2017, following the report of the Special Commission of Inquiry into the Greyhound Racing Industry.

Vital video evidence ruled inadmissible

OPINION: Hospital's treatment first class

A view of the Ipswich Hospital from the corner of East and Court Street. Photo: David Nielsen / The Queensland Times

Our health system really is world class

Latest deals and offers

Ipswich people love heritage

'It's a great vote of confidence for a program that was launched in 1992 and has since provided thousands of property owners with heritage conservation'


What's on this week

GRAB A BARGAIN: The Cameron Park Market is held on the first Saturday of every month.

Five things to do in Ipswich

VIDEO: What did Thor do during Captain America: Civil War?

Short explains why Thor wasn't in Civil War film.

Hilarious mockumentary features star of the film Chris Hemsworth

Meet Toowoomba's top exotic dancer

WINNERS ARE GRINNERS: Exotic dancers (from left) Alice Morgan, Celeste and Frenchie are heading to the United States after competing in Miss Vault 2017.

Dancers vie for top spot at Toowoomba's only strip club

That's a wrap: Gympie Muster celebrates 35 years in style

Caitlyn Shadbolt performs at the Muster Club on Sunday August 28 at the Gympie Muster.

Country music festival blessed with great weather and bumper crowds

Julia and Sasha top The Block's leaderboard

Julia and Sasha in their winning master en-suite in a scene from The Block.

FIRST room reveals of the season deliver mixed results.

What's on the small screen this week

Bella Frizza in a scene from the TV series Married At First Sight.

THE Block's $65,000 bathroom is revealed and strangers marry.

REVEALED: Pat Rafter's $18m Coast house on the market

Check out the photos of the Coast's most expensive property for sale

The "correction we had to have" in Gladstone's rentals

UPWARD MARCH: The rental vacancy rate in Gladstone has improved for the first time in more than a year, providing a confidence boost in the market.

Vacancy rates improve with signs that things are getting betterF

ISLAND FOR SALE: Cheap Fraser Coast island drops price again

Suna Island in the Great Sandy Strait will be auctioned by Ray White Hervey Bay on Saturday morning.

This is the cheapest island you will find for sale in Australia

How a family home can fit on a 250sq m block

This is what you can build on 250m2.

Here's the floor plan of a home built on 250sq m

$100m plan for Curtis Island 'world class' luxury resort

$100 million resort: Top views at Turtle Street at Curtis Island.

"At the moment we think it meets all the town planning approvals.”

Noosa mayor on "red alert" over planning court decision

Mayor Tony Wellington hands down his first budget.

Mayor upset at lack of say about look and feel of Noosa