Rhizoctonia

Rhizoctonia

Rhizoctonia solani is a soil fungus with a wide host range and worldwide distribution. Host plants include almost all vegetables, flowers, shrubs and trees.
When each leaf counts, leaf samples can point to plant’s needs

When each leaf counts, leaf samples can point to plant’s needs

It’s fine for a tomato plant to have a few spots on its leaves. But it’s a different matter when it comes to flowering
“Hygiene protocol and resistant varieties go hand-in-hand”

“Hygiene protocol and resistant varieties go hand-in-hand”

As a cucumber grower you have to have iron discipline and nerves of steel. An apparently invisible enemy – CGMMV – is always lurking
In the past the use of rootstocks represented an important step in the fight against soil-borne diseases. But rootstocks offer many more possibilities: Improved vigour, setting, flower and fruit quality.

Rootstocks: an extra instrument to achieve production goals

In the past the use of rootstocks represented an important step in the fight against soil-borne diseases. But rootstocks offer many more possibilities: Improved
Magnesium deficiency in gerbera appears as red discolouration.

Plants wouldn’t be green without magnesium

Magnesium fulfils many functions within the plant. The element is crucial for the activity of many enzymes. These play a role in photosynthesis, the
Stefan Bakker, here at Ter Laak Orchids in Wateringen: “Choose your sources wisely and keep the best quality irrigation water for the summer period.”

Knowing where and how water contamination can occur is key

Dutch greenhouse growers manage their water flows and emissions into the environment very well compared to those in some other countries. But they could
Grower Frans Kortenhorst: “With this film, we cut our watering by 25% and I got rid of Sciarid fly in one fell swoop.”

“Film over the top of the pot does nothing but good”

Dutch Rhododendron grower Frans Kortenhorst was looking for a way to get rid of weeds and moss in his pots for good. He cut
Pest monitoring forms the basis of good biological control. Knowledge of the ratio of harmful and beneficial insects is indispensable in determining the necessary control strategy.

Monitoring system for spider mite damage and yellow sticky traps

Pest monitoring forms the basis of good biological control. Knowledge of the ratio of harmful and beneficial insects is indispensable in determining the necessary
Orius nymphs turn out to be highly mobile. With targeted supplementary feeding, this adult bug can be attracted to new cuttings.

Researchers make breakthrough in thrips control in chrysanthemum

The predatory bug Orius has been used to control thrips in sweet pepper for many years with great success, but the results have so
The Greenhouse Horticulture and Bulbs, Trees and Fruit business units are launching an Evergreen project to carry out research into bulb production

Plant growth promoting rhizobacteria in bulb production

The Greenhouse Horticulture and Bulbs, Trees and Fruit business units are launching an Evergreen project to carry out research into bulb production using fewer
A group of experts have now compiled all the available knowledge in this area in a book called “Vegetable grafting: principles and recent practices”.

Book about grafting fruiting vegetables

Levels of production of crops such as tomato and aubergine have increased in recent years with the use of rootstocks. In a number of
The Precision Horticulture Programme was launched this year. It is a form of horticulture in which plants receive precisely the treatment they need.

Precision Horticulture Programme focuses on plant level

The Precision Horticulture Programme was launched this year. It is a form of horticulture in which plants receive precisely the treatment they need. In
An uptake analysis gives growers an accurate picture of which elements the plant is actually taking up, enabling them to fine tune the nutrient solution

Nutrient deficiency in peppers despite perfect drainage values

When several of the sweet pepper plants at Zwingrow in Honselersdijk (Westland, the Netherlands) were found to be growing more slowly than the rest,
Erwinia is a bacterial disease that can cause damage in a range of crops.

Erwinia

Erwinia is a bacterial disease that can cause damage in a range of crops. It often produces watery looking, rotten patches on the leaves,