Lt Defense

protection against powdery mildew

Rijk Zwaan’s Lt Defense varieties protect against infection with powdery mildew (Leveillula taurica or Lt) in sweet pepper and hot pepper cultivation. This disease can be a big problem for growers. The resistance restricts the growth and development of the powdery mildew. Varieties with this resistance are an effective solution for growers. Lt Defense is part of Rijk Zwaan’s Defense label.

Why growers choose Lt Defense

Leveillula taurica is difficult to detect at an early stage, which is why it is so easy for the disease to spread unnoticed in sweet pepper and hot pepper crops. Growers who choose varieties with an Lt resistance can reduce their use of crop protection agents. The crop is healthier and more productive. There are also lower amounts of residue on the fruits, which is important to retailers. Moreover, using less sulphur is better for the plastic materials in the greenhouse. As a result, Lt Defense gives growers greater peace of mind throughout the crop cycle.  

Benefits of Lt Defense

  • A healthier crop
  • A higher yield
  • Reduced need for crop protection agents
  • Lower residue levels on fruits
  • Less impact on plastic greenhouse materials thanks to reduced use of sulphur

Sweet pepper and hot pepper varieties with Lt Defense

Rijk Zwaan offers a growing number of sweet pepper and hot pepper varieties with Lt resistance. These varieties are indicated by the Lt Defense label. Lt Defense is available for Rijk Zwaan’s sweet pepper and hot pepper segments as follows:

  • Blocky
  • Hungarian Wax
  • Dolma
  • Sivri
  • Kapya
  • Med hot pepper

Trials reveal clear differences

Lt Defense pepper varieties are less susceptible to the effects of powdery mildew than standard varieties. Trials have shown that Lt Defense varieties slow down the growth and development of mildew. This not only delays damage to the crop, but also gives growers more time to react to any damage. In the resistant varieties, the production and fruit quality remain stable.

Minimising the risk of spread

It is very important to get each crop cycle off to a hygienic start by destroying all the old plant material. Because the spores can survive for approximately seven days, it is advisable to leave the greenhouse empty for two weeks.