Delhi Defense Squash
Delhi Defense offers protection against the ToLCNDV virus
Rijk Zwaan’s Delhi Defense courgette varieties protect against infection with the tomato leaf curl New Delhi virus (ToLCNDV or New Delhi virus). This virus creates lots of production problems for growers, especially in the Mediterranean region. Resistant varieties offer them a solution. Delhi Defense is part of Rijk Zwaan’s Defense label.
Interested in Delhi Defense Squash?
Joost van Veen
Why growers choose Delhi Defense
The New Delhi virus can cause considerable damage to courgette crops because it leads to severe leaf curl and stunted growth. Besides that, it completely stops the plant’s development. Delhi Defense courgette varieties have a strong resistance against this virus, resulting in stable production and higher-quality fruits. Growers need to use fewer crop protection agents, which leads to better working conditions, more sustainable production and interesting sales opportunities. Delhi Defense gives growers greater peace of mind throughout the crop cycle.
Benefits of Delhi Defense
- Stable and sustainable production
- High-quality fruits
- Less need for crop protection agents
- Better working conditions
Courgette varieties with Delhi Defense
The Delhi Defense courgette varieties are indicated by the Delhi Defense label. These varieties are the result of many years of research and breeding work by the Rijk Zwaan team.
ToLCNDV virus in susceptible courgette varieties
An infection with the New Delhi virus becomes apparent very suddenly, after which it is often impossible to save the plants. The whitefly Bemisia tabaci is the most important vector of the virus. Since ToLCNDV thrives in hot and humid conditions, it is most prevalent in the summer and autumn.
This plant virus can affect the leaves and fruits at any stage of production, resulting in small, misshapen fruits and ultimately in a lower yield. The New Delhi virus can cause significant damage to courgette crops, since most of the affected plants die.
Trials reveal clear differences
Results from trials show a clear difference between a susceptible variety and a Delhi Defense variety. The resistant plants look healthy, remain symptom-free and continue to produce high-quality fruits.
Minimising the risk of spread
Although the Delhi Defense courgette varieties are resistant, they are not 100% protected. In order to minimise the risk of spread, growers are advised to choose a Delhi Defense variety, keep the whitefly population down and closely monitor the development of symptoms in other host plants.