Caused by fungus Puccinia destructor.
It may appear at any time of the season, but is most often a problem in humid areas, especially in cool wet weather (the spores need water to germinate and grow). It enters the plant through wounds and natural openings and first appears on older leaves.
Symptoms
Appears as white, yellow or brownish spots on the upper surfaces and downy grayish mold on the corresponding undersides (this eventually releases more spores). These spots eventually turn darker in color and the leaf dies. Because of the whitish patches of mildew, it is sometimes confused with powdery mildew or gray mold. Downy Mildew appears down on the underside of the leaf, while powdery mildew is on top of the leaf too.
Management
Avoid planting infected sets; rotate crops to non-allium species for at least 3 years; plant in well-draining areas and do not overcrowd plants.
Destroy all infected crop debris; Improve air circulation and keep the leaves dry (if you must use overhead sprinklers then water early in the morning or evening, so plants don’t stay wet all night).
Use resistant chives varieties to downy mildew.
GREENLIFE SOLUTION
- ABSOLUTE STAR 400 SC at 8 ml + 3ml Integra in 20L of water
- TRINITY GOLD 452 WP at 50g + 3ml Integra in 20L of water
- TOWER EXTREME 680 WDG at 50g + 3ml Integra in 20L of water.
- MILESTONE EXTREME 390 SC at 5ml + 3ml Integra in 20L of water
Tomato yellow leaf curl virus
Control of Whiteflies.
Why is it difficult to control whiteflies?
- Whiteflies have wings which enable them to swarm ahead once farmers start spraying the pesticide making it very difficult to control them.
- Wide range of species making it difficult to identify during scouting.
- Host range. -Whiteflies do survive on all crops in the fields making it harder to effectively eradicate.
Farmers who wish to effectively control whiteflies, must partner with Greenlife.
We offer a wide range of chemicals which effectively control the whiteflies. These include:
- LEXUS 247 SC
This product is very effective in the control of whiteflies. It combines both contact and systemic action. It also displays a knock down effect Which rapidly kills the pest and stops further damage immediately.
- TAURUS 500 SP
Also displays systemic and contact mode of action. The A.I in this product enters the plant system and protects the plant against any whiteflies which might attack the plant up to 7 days after spraying is done.
Combines three modes of action.
- Contact action. It kills all the whiteflies which it comes in to contact
- Repellent action. This product is characterized by a very strong smell which repels the whiteflies from the area where spraying has been done.
- Translaminar effect. Enters the plant system and prevents the whiteflies from attacking the crop for a period of seven days.
Please note: When applying this pesticide, early in the morning or late in the evening is ideal when the target pests are less active.
Try us today and you will never regret it!!
