Florcom Gardens

Follow our pruning steps if you want abundant of healthy flowers like this during the summer months.

• When to prune:

Prune during the end of winter when you do not expect severe cold conditions. Do not prune when the soil is wet (Cutting zones will die back if pruning takes place when the soil is wet). Prune while eyes are dormant and before they start to develop. In colder areas it is best to prune during the first two weeks of August. In areas with a more moderate climate pruning may take place during the last two weeks of July.

• Dead wood:

Remove all the old dead wood.

• Where to prune:

Cut the plant back to the lowest green and healthy wood. Prune just above an eye and leave 3 to 4 eyes on the stem.

• Allow light to enter the plant:

Remove some of the stems growing to the inside of the bush in order to allow sunlight to enter the bush.

• Tree seal:

Paint the cutting zones with tree seal. This will help to prevent die-back.

• Compost:

Spread compost over the beds (100 to 300 grams of good quality compost per square meter).

• Lime:

Broadcast dolomitic lime on the surface of the soil if the soil is too acid. The amount depends on the pH of the soil.

• Lime sulphur:

Spray the plants and soil with lime sulphur. Do not spray lime sulphur on plants with active growing eyes or foliage – it will burn the eyes and leaves. Lime sulphur will control fungi spores on the plants and in the ground. Remember that lime sulphur should be fresh – old stock is not effective. Use concentrations as indicated on the label of the sulphur.

• Watering:

Give no water the two weeks before pruning. Give a small amount of water immediately after pruning. Remove the water stress but be careful not to give too much water – too much water during this dormant growth phase will cause root rot. Irrigate at least weekly after pruning and increase the amount of water gradually.

Besproei die plante slegs in die oggend en maak seker dat geen water in die middag op die blare gespuit word nie. Indien die blare gedurende die herfs se koel nagte nat is kan Donsige skimmel (Downey mildew) ontwikkel. Donsige skimmel kan plante nou ‘n groot terugslag gee met die gevolg dat die plante volgende seisoen ‘n groot agterstand het.

· Special mix for Downey mildew:

Proplant or (Previcure N): 20ml per 10-liter water.

Latron B: 1ml per 10-liter water.

This program is based on the assumption that the amount of spray mix applied is approximately 800 to 1200 liter per hectare.

Kliek op die skakel hieronder vir alles wat jy wil weet oor die simptome, oordrag en beheer van Donsige skimmel.

http://www.florcom.co.za/?page_id=1805

• Gedurende die herfs is Swart vlek die mees algemene siekte wat in tuinrose voorkom. Vra gerus vir jou kwekery na die beste behandeling vir Swart vlek en spuit die plante gereeld.

Kliek op die skakel hieronder vir alles wat jy wil weet oor die simptome, oordrag en beheer van Swart vlek.

http://www.florcom.co.za/?page_id=1806

• Gedurende die herfs begin roosplante in tuine afgaan en is baie tuiniers geneig om al die lelike takke uit te sny. Wees baie versigtig om nie nou te veel terug te sny nie. Indien jy nou terugsny sal jy die plant stimuleer om in die winter nuwe lote te maak met die gevolg dat die plante dan moeiliker in hulle winterrus sal oorgaan. Ogies wat gedurende die winter uitloop sal heel waarskynlik blinde lote wees (‘n blinde loot is ‘n steel wat nie ‘n blom op sy einde ontwikkel nie). Te veel terugsny gedurende die winter sal ook veroorsaak dat te veel blare verwyder word – fotosintese vind in hierdie blare plaas en te min blare sal veroorsaak dat die plant nie genoeg energie opbou vir volgende seisoen nie.

· Gebruik die blare in jou tuin om ‘n deklaag rondom jou roosplante te skep. Hierdie deklaag sal help om die grond klam en warmer te hou.

• Moet nie gedurende hierdie tyd van die jaar die grond rondom die roosplante versteur nie. Beskadiging van die wortels sal nou baie nadelig vir die plante wees. Haal dus bossies met die hand uit en skoffel so min as moontlik met gereedskap wat die wortels kan bekadig.

• Wees versigtig om gedurende die herfs nie te veel water te gee nie. Een of twee benattings per week behoort voldoende te wees.

Red Spider Mite – a problem during the dry hot summer months 

Visual symptoms of Red Spider Mite damage: Webs on the leaves and flowers and grey colors on the leaves.

General

The presence of Red Spider Mite in garden roses is one of the major disease related problems during the dry and hot summer months. This pest is favored by hot and dry conditions. They fed usually on the underside of leaves by means of sucking mouthparts. The eggs and mites are covered with a delicate web, which protects them from contact sprays. In recent years Red Spider Mite has become a major problem in our nurseries. For control of Red Spider Mite it is very important to understand the life cycle of the spider.

Life cycle

Egg – larva – nymph – adult

Up to 20 – 30 short cycles per year are possible under dry and hot conditions. Under ideal conditions this cycle can be as short as 8 – 12 days. Important is the fact that 75% of the adults are females and that one female can give rise to millions of spiders within a few months.

Control of Red Spider Mite during dry and hot conditions

When controlling Red Spider Mite the following must be taken into consideration:

§ Red Spider Mites can become resistant to pesticides and pesticides must be varied frequently.

§ Pesticides used for different parts of the life cycle must be used alternatively during different spraying sessions.

§ Keep the humidity high during hot periods. (Wet the soil surface).

§ Spray on the underside of the leaves and use small droplets for effective coverage.

Roosplante is uiters gevoeilg vir sistemiese onkruiddoders. Selfs indien hierdie middels slegs in die nabye omgewing en nie direk op die plante gespuit word, kan ernstige groeiremming en groeiafwykings voorkom. Enkele druppels sistemiese onkruiddoders wat deur die wind na roosplante gedra word kan permanente beskadiging veroorsaak. Indien sistemiese onkruiddoders direk op roosplante gespuit word, sal die plante mettertyd vergeel en doodgaan. Indien nabygeleë gedeeltes van die tuin of kweekhuis gespuit word en druppels deur die lug sweef en op die rose se blare land sal die plante waarskynlik lewendig bly, maar nuwe blaartjies en blomme kan klein en misvorm wees. Dit mag enkele jare duur voor hierdie simptome verdwyn en die aanbeveling is gewoonlik om bekadigde plante uit te haal en nuwes te plant.

Simptome van onkruiddoderskade:

A. Simptome wanneer gif direk op die plante gespuit is:

• Die roosblare sal binne twee weke begin vergeel, verdroog en daarna sal die hele plant sterf.

B. Simptome indien slegs druppels op die plante gekom:

Afhangende van die tipe gif kan verskeie tipes simptome ontstaan:

• Nuwe roosblare kan geel, klein en misvorm wees.
• Nuwe blare kan donkergroen wees, smal en opkrul.
• Blomme kan klein en misvorm wees.

Maatreëls:

Die simptome kan baie jare op die plante bly. Indien jy seker is dat gif wel die oorsaak van die simptoom is, sal dit beter wees om die plante te vervang.

Ander faktore wat soortgelyke simptome kan veroorsaak:

• Indien sekere sistemiese middels vir die beheer van plae en siektes te gereëld en teen te hoë konsentrasies gespuit word, kan soortgelyke simptome ontstaan. Wanneer toediening van hierdie giwwe gestaak of verminder word, sal die simptome egter verdwyn. Simptome wat deur sistemiese onkruiddoders veroorsaak is, sal daarenteen ‘n aantal jare neem om te verminder of te verdwyn.
• ‘n Tekort aan sink (Zn) kan soortgelyke simptome op blare veroorsaak. Die simptome sal egter verminder indien Zn as ‘n bladvoeding toegedien word.
• Wees versigtig om nie misvormde blomme wat deur ‘n tekort aan boor veroorsaak is, met onkruiddoderskade te verwar nie.
• Downey mildew veroorsaak ook by sommige variteite misvormde blomme. Na beheer van die siekte sal die nuwe groei egter normaal wees.

Waarskuwing

• Moet nie met sistemiese onkruiddoders naby roosplante spuit nie.
• Rooskwekers mag nie sistemiese onkruiddoders op hulle kwekerye toelaat nie en mag dit nie binne of buite hulle kweekhuise gebruik nie.

Botrytis is transmitted when the light intensity is low and the humidity high.

Symptoms

• Black or brown spots on petals.
• Die back of soft stems.
• Die back from wounds caused by harvesting or pruning.

Control

• Do not harvest rose stems more than a centimetre above an eye (die back will occur if harvested too high above an eye).

• Do not prune if the growth medium is wet.

• Spray with fungicides registered for Botrytis on roses (spray in the morning).

• Do not spray fungicides or water on the flowers during the afternoon.

• Do not irrigate from above when it is cloudy and cool.

Click here to see our slide show of rose diseases.

Buy our rose CD and use our user friendly key for the identification and treatment of pests and diseases in your rose garden.