Home Made Pest Control Solution(s)

I'm really not a big fan of pesticides or chemicals. Actually, that's putting it mildly...I hate pesticides. They are almost always used too liberally, and often used as a preventative measure rather than to get rid of a problem. But at the same time, I'm not a big fan of caterpillars shredding my fresh new cycad leaves, or aphids sucking the life out of my new buds or snails devouring my lettuce leaves before I get a chance.

So what do we do? Where is the middle ground? Am I supposed to console myself with the fact that I have well fed snails? What do I do while I wait for the birds to get off their feathered behinds and do their job eating the insects that I'm restraining myself from spraying? When do these natural ecosystems kick in?

Before we begin, its important that you ask yourself these very important questions!

The first step is to figure out whats behind the carnage or the ailing plant.

Plants are usually pretty good at fending the insects or diseases off themselves. A healthy, well looked after plant is not likely to be affected by insects or diseases. So firstly, make sure that your plant is getting the optimum combination of the 3 essentials - light-water-food.

Once you're sure you're not under or overwatering, or you know the plant is in the right place, and you've fed it with a good nutrient-rich compost then maybe its time to get off defence and plan your attack.

Health problems in plants can be divided into 2 categories - Pathogens that cause disease, and Parasites that eat the plants.

So, before reaching for the pesticide spray, take a look at these natural remedies for getting rid of pests and diseases. These are the most common problems that I have seen throughout the years, and the home made remedies that go a long way to getting rid of them:

Pest Problems:

Aphids

These are tiny green or light brown insects often clustered around new buds. They suck the sap out of the plants, and can spread plant viruses. Often the most obvious sign of aphids is an abundance of ants, and a black sooty mould on the leaves and ground. This ants are actually milking the aphids which secrete a sugary substance which is what forms the black mould. (Soap Spray, Garlic Chilli Spray and Horticultural Oil)

Caterpillars

Caterpillars vary in size and description, and love all kinds of soft leaves and juicy plants. They are often found hiding on the under sides of leaves. Evidence of their presence is usually their little black poos on leaves and around the base of plants (Garlic Chilli Spray and Horticultural Oil)

Mealy bugs

Mealy bugs are small cotton woolly insects that hide along stems and midribs, and similar to aphids, encourage ants with their sugary sap that they produce. Black sooty mould is often present. (Soap Spray, Garlic Chilli Spray and Horticultural Oil)

Red Spider Mite

These tiny almost microscopic little spiders are more easily spotted by their tiny cobwebs on the underside of yellowing leaves. They thrive in dry windless environments like indoors or sheltered spots near buildings. (Water, Wind, Soap Spray, Garlic Chilli Spray and Horticultural Oil)

Scale

Often look like tiny waxy bumps along the midrib of leaves or around soft stems of plants, they can be black, brown or white, and also encourage ants to feed off the sticky sugary substance that they produce. (Soap Spray, Garlic Chilli Spray and Horticultural Oil)

White fly

These are extremely tiny little "flies' that are actually more similar to aphids. They congregate in their thousands often on the underside of new leaves and fly away quickly when disturbed. It is best to do follow up sprays every 2-3 days. (Soap Spray, Garlic Chilli Spray and Horticultural Oil)

Snails and Slugs

Often found hiding in the cool undersides of leaves or rocks. You can often spot their silvery trails around the plant or soil beneath. (Beer, Grapefruit halves, Egg shells)

Pest Control Solutions:

Soap Spray – Dissolve 3 teaspoons of liquid soap or washing detergent in 2 cups of water into a spray bottle and use it to control aphids on roses, citrus and other plants. The soap removes the aphids waxy coating and dries them out. Also good for mealy bugs, ants and whiteflies. 

Garlic-chilli spray – Chop and boil 4 onions, 4 hot chillis and 2 garlic cloves in 2 litres of water for about 15 minutes. Let the liquid cool overnight, then strain into a jar and add 2 tablespoons of liquid soap. To spray, mix 10ml of your concentrate in 1 litre of water in a bottle and use to control aphids, caterpillars, whitefly, and other pests. 

Horticultural oil – Use 2 cups of vegetable oil and 1/2 cup of liquid soap. Shake together in a jar, where the mixture will turn a milky colour. Add 2 tablespoons of this concentrate to a litre of water and spray.  This controls most insect pests, including scale, aphids, white fly, leaf miner, mealy bug and mites.

Hollowed out orange or grapefruit halves placed upside down overnight - These attract snails and slugs inside them. These can then be collected from the garden and thrown away.

Glass of beer - Snails and slugs are a sucker for a good glass of beer, into which they crawl in and drown. At least they die happy?

Crushed-up egg shells spread around the base of plants deters snails and slugs. They are too sharp for the soft undersides of these creatures.

Other Home Remedies:

Baking Soda is great as a preventative measure against powdery mildew on plants. Mix 1 tablespoon of baking soda, 1/2 teaspoon of liquid soap and 3 litres of water. It can burn the leaves of some plants so water plants well before use and don’t apply in full sun. Try and get the under side of the leaves too.  In very humid conditions, Powdery Mildew can also be prevented by watering the soil rather than leaves.

Vinegar, or Boiling Hot water can be poured into paving to kill plants between bricks or pavers.

Milk Spray Fungicide – Also works best as a preventative measure or in the early stages. Mix 50ml milk into 450ml water and spray onto the leaves. Re-apply every time it rains. Not effective on badly affected plants.

Indigenous Beauties : Kleinia fulgens

If you're looking for a small plant that makes a big difference, then the coral senecio is it. Its a hardy plant, ideal for a rockery, amongst grasses or planted alongside aloes. Its a plant to rival David Blaine - the endurance artist and illusionist. Its incredibly tough - plants can be left out of the ground for weeks, and when replanted, carry on as if nothing ever happened.

Kleinia fulgens peaking out of Aloe vanbalenii's legs

Added to its supernatural abilities the fact that it is a perfect combination of silvery-blue foliage and bright red thistle-like flowers, you know it will stand out in any garden or container.

Kleinia Fulgens in flower

The resilient succulent grows to about 500-600mm, and loves a hot dry spot in the garden. It flowers best when its been well fed and watered in summer and then left dormant in winter. The lipstick-red flowers look amazing flowering alongside Aloes in winter.

The name Kleinia comes from the German zoologist - Dr Klein, who first documented the plant, but klein also happens to be the Afrikaans word for small. Fulgens is the latin word for glittering. 'Little Glittering' is a perfect summary of this amazing plant.

Behind The Scenes - Coastal Dune Garden - Follow Up

I mentioned in a previous post on a Coastal Dune Garden we completed, that I would follow it up with some photos, so here they are:

This is where we started - no level area. Trees screened the house in front, but also blocked the view.

Berms now hide the house below, and give additional height for the plants to grow on. The area, now level, provides ample room and gives a feeling of space and openness.

Aloe vanbalenii, is one of my favourite aloes. The amazing changes in colour of its leaf from apple green to burnt red is only just surpassed by its spectacular flowers. When they're grouped together they look their best. I used mainly succulents on the front of the 'dunes' because of their neat look, and easy maintenance. They handle the wind and poor soil normally associated with beachfront properties.

Behind the dunes, I planted swathes of grass, to create a soft backdrop to the 'harder' looking succulents. I also wanted the grass to create movement, almost like water washing against the beach.

I interspersed the grass with Eucomus, Gladiolus, and Watsonia which will create little spots of colour in amongst the predominantly Melinis nerviglumis grass. Watsonia is quite rare, and on the endangered list, so I try and use it wherever I can, and as close to its natural habitat as possible.

Behind the grass, I planted Plumbago, and a pocket of Leonotus leonurus, which the vervet monkeys are apparently loving. Sunbirds are also a common visitor to the spires of nectar-filled orange flowers, which remind me of little miniature fireworks.

Round-leafed Kalanchoe thyrsiflora is nestled in between the large rocks that we placed close to the top of the dunes. We really sweated while trying to manouvre these massive stones down to the lower garden without damaging them, ourselves or anything else.

Although rocks are seldom found on actual dunes, they do create an immediate sense of permanence to the garden, that the plants will eventually grow into.

Indigenous Beauties : Helichrysum umbraculigerum

On a recent trip to Vernon Crookes Nature Reserve (which is beautiful at any time of year), I had a chance to take some photo's of this beautiful Helichrysum. Its not a very common garden plant, which is hard to understand when you see the large yellow flowers that rise up above the veld. I really had to fight hard to resist the urge to take some cuttings!

Helichrysum umbraculigerum

Actually, as with many Helichrysum, the 'flower' is actually an umbel. This is basically a collection of tiny flowers that all rise from the same point on a stalk, and form a flattish top - think umbrella. They remind me of little landing pads for insects flying over the grass in search of food.

Its a fast-growing perennial with hairy grey-green leaves. It flowers towards the end of Summer, as most other flowers are starting to go to seed. It reaches about a metre in height, and spreads out about 1 metre wide.

It looks spectacular when planted in large groups.

It generally prefers sun or light shade, rich well-draining soil in summer rainfall areas.
The umbels make excellent long-lasting cut flowers.

Behind The Scenes - A Restored Guest House Garden

I've been working on the designs for a garden since the end of last year, for a beautiful old house high up on the ridge of Berea. I've driven past the house quite often in the past, and wondered when or if it would ever be renovated.

Last year, the owners of a guest house down the road took on the honourable task of restoring it to its original beauty. From white ant nests in the walls (which were held together in some places not with cement, but hard clay), to leaking roofs - I'm not sure if they realised the amount of work that was in store for them when they began. But they've taken to the task admirably, with the deadline of being ready for the 2010 World Cup looming.

My clients were incredibly trusting, and have allowed me quite a bit of freedom with the design of the garden. I felt obligated to make sure that the garden was a suitable adornment to the soon-to-be renovated house.

There were 2 main areas to the garden - the front entrance/parking area, and the back garden. I started with the design of the back area. This was the largest area, and I felt that this area would influence the design of the rest of the garden.

My first thoughts were that the garden needed to be terraced to make it more usable. A slope, even just a slight one can make it hard to use an area, so I prefer to level out a space to make it more inviting, and at the same time, allow it to be have multiple uses.
I also felt that because this back garden area was quite low down and there were no real views to make use of, the garden should be inward rather than outward looking.

The ideal way to do this would be to create a central focal point, and possibly screen the outside views with hedging, creating something close to a cloister garden.

The other aspect to bear in mind is that the garden will be viewed from above almost or more often than from inside. So it would be necessary to create a garden that would be as beautiful when looked down at from above. I believe the garden will have a very different feel when people take the time to walk down into it, than how they will perceive it from above. When you stand on the verandah on the main level, there is a great feeling of space and openness with views to the North West. You will look down onto a garden with a strong axis, focal points, and a lot of colour but it will still feel very open. Once in the garden it will feel far more introspective.

I thought the space would also lend itself to outdoor weddings, so in the long term it would be ideal to have an arbour on the lower terrace, which could also double-up as a shady outdoor eating area. A swimming pool in Durban is an absolute necessity. I positioned a long narrow pool on the top terrace, and then linked it with a rill to the main focal point which is a central fountain. Running water also helps cut out some of the faint sounds of traffic.

I wanted the garden to provide abundant cut flowers to be used in the guest house, so there will be a strong focus on flowers, and colour.

Indigenous Beauties : Stapelia gigantea

I love using contrasts in a garden, and Stapelia seems to have more than its fair share of contrasts all in one plant. The best description I can think of for this plant is that its Pretty Awful - but in a good way?

Stapelia gigantea
Carrion Flower

If you are used to looking at the fairly nondescript succulent stems for most of the year, the flower when it arrives, starting with a blood red bud, opens up into an incredibly beautiful pale yellow flower. The fleshy flower itself seems too big for the small stems, and although it looks amazing, it smells terrible - unless you're a fly of course.

Its common name is Carrion Flower because of its use of its awful rotting flesh smell to attract insects - and particularly flies. The flies spread pollen from one flower to the next as the pollen sacs get stuck to them.

The stems are four-sided and are spineless, and are able to withstand extremes - from dry to relatively moist conditions. It can be planted in semi-shade, but will flower well in full sun. It would often be found in rocky, sandy soil, and even in rock crevasses, where its root benefits from the coolness of the stone. It's large flowers put on their show from summer to autumn.

They generally need a cool dry winter period, and can be cultivated very easily. Stapelia is definitely an easy plant to grow and look after - and is well worth finding a spot for it. But preferably where a breeze will dilute its odour!

Indigenous Beauties : Dissotis princeps

Dissotis princeps
Wild Tibouchina

Dissotis princeps is a wild and princely plant. It flowers off and on from the end of Summer right through to the beginning of Spring. Its an ideal plant in wet or damp areas in the garden, it flowers for long periods, and loves full sun. Its also an easy plant to grow, it grows very fast, and can be cut right back after flowering.

Its common name is the Wild Tibouchina because it looks similar to the Tibouchina we see in established gardens, but its also known as the Royal Dissotis, because princeps means 'princely' in latin.

Its been known to be used as an aphrodisiac, and been harvested as a vegetable in difficult times.

Indigenous Beauties : Gloriosa superba

The flame lily is a truly spectacular plant in full bloom, but its a plant that comes with a warning label - the whole plant is extremely poisonous when eaten.

Gloriosa superba
Flame lily

But even though its blossoms bite, its apricot/orange/red flowers make it worth finding a place to show it off.

It loves semi-shade, and will often climb up into the shrubs and trees that surround it. It seems to grow best in sandy soil, but with plenty of water.

It flowers in summer, and then dies back completely in winter, leaving little trace of its beauty.

Indigenous Beauties : Cross Berry

Its easy to find plants to admire this time of the year, when everything is looking so lush and green, and every plant is bursting with extravagant flowers.

Grewia occidentalis
Cross Berry

The Cross Berry (Grewia occidentalis) though, is one of those plants that seem to be easily over-looked. Its never one for histrionics. The flowers which start in Summer, are never showy, but are always pretty. Birds and butterflies are not superficial however, and know a Grewia's real value and will often be found eating the 4-lobed fruit from which it derives its name.

It ranges in height from 2-5m, and will grow in Sun or Shade. It is semi-deciduous - in optimum conditions it won't lose too many leaves. Its a great tree for a small garden, and will often form more than one stem. It looks even better when planted to form a grove of Cross Berries.

If you're looking for other small trees for small gardens, check this previous post.

What flower is this?

I was driving past Burman Bush - a very under-appreciated wild area in the middle of Morningside (Durban, South Africa), when this large shrub/small tree caught my eye. Everything around it was bare and brown despite the recent spring rains we've had, but in the afternoon light it really was doing its best to be noticed, so I had to take a picture to try and identify it. It was covered in these beautiful star-shaped flowers, and a few leaves.

Any clues as to what it might be?

Indigenous Beauties - Bird attracting garden

My team and I are busy with the tidying of the garden of a beautiful old Durban home. It has a well established indigenous garden, with some exceptional plants.

Halleria lucida - Tree Fuschia

The Tree Fuschia is a great plant for attracting birds. Sunbirds in particular love the nectar that they get from the tubular flowers that sprout profusely from the Halleria's stem. Fruit loving birds also love the green berries that appear in Spring.
Its an excellent plant when you're looking for fast growth, and it grows to a height of anything from about 3m to about 15m. It will grow in full sun or semi-shade, but will look better in a slightly sheltered spot.
It has been used medicinally for skin and ear problems.

Carissa bispinosa

The Carissa, or amatungulu is a very useful plant. It has attractive white flowers, which appear in Summer, followed by bright red fruit, which are high in vitamin C. The fruit are used to make a delicious jam.
It grows in Sun or Semi-shade, and does quite well on windswept dunes. It is often grown as an impenetrable hedge, as it is covered in painfully sharp forked spines.
It is relatively fast-growing once established, but takes a while to get going. It will reach about 3m in height if left, but looks better when cut back into a dense shrub.

Schotia brachypetala

The Schotia is also known as the Weeping Boer-boon (Farmers Bean) . It has been given this name because of the huge amounts of nectar that drip from the beautiful bright-red flowers, and because its pods are shaped like beans. Because of the dripping nectar, its best not to plant it too close to paved areas, or near parked cars. Nectar-loving birds are frequent visitors to this tree. Its relatively fast growing, and reaches about 15-20m high and wide.

Some of the other well-established bird-attracting plants were Aloes, Cussonia, Indigofera, Polygala, and a Toad Tree. One plant I couldn't identify, which had an amazing sweet scent was this little shrub (1.5-2m high):

Any ideas as to what it is?

Indigenous Beauties : Tapinanthus

While clearing some branches and cutting down an alien invasive Syringa tree, I noticed this amazing plant growing on the branches of the Syringa. It's common name is 'Lighting Matches', for obvious visual reasons.

Tapinanthus
lighting matches

Its a type of mistletoe, and is hemi-parasitic. This means that it uses the sap of the host plant that it is attached to, as well as creating its own energy from photo-synthesis. In most cases it won't kill its host, but if in abundance on a single tree, it may weaken its host, making it prone to diseases.

It is spread by birds which eat and regurgitate its extremely sticky fruit, the fruit usually lands on a branch, which then attaches itself by sending out 'roots' into the branch.

The fruit is also used to catch birds, by being chewed into a sticky pulp which is then spread on the branches of trees. Birds get stuck to the glue, and are then quite easily caught.

It is not easily spotted, as it blends well with its hosts leaves. However in winter when the host loses its leaves, and it begins flowering it is quite easy to see.

It might be a great environmentally friendly way of dealing with the Syringa I need to cut down - spread enough of the Tapinanthus onto its branches, and weaken it, so that it eventually dies on its own?

Take The Time To Smell The Roses

Following a thread, I found a post on a blog in japan about a japanese tradition called Hanami. This is the custom dating back to the 8th century whereby people gather underneath cherry trees that are in full bloom to contemplate the flowers.

Some of the essence of this custom has probably been lost over the centuries, but wouldn't a lot of the problems that we have in South Africa be lessened if we cultivated a habit of taking time to contemplate the flowers?