Brand Label

Lettuce varieties with high resistance to the Impatiens Necrotic Spot Virus

Rijk Zwaan's INSV Defense lettuce varieties offer protection against the Impatiens necrotic spot virus (INSV), a threat transmitted by the western flower thrips. This unique resistance, part of our esteemed Defense line, ensures healthy lettuce crops, safeguarding your agricultural investment.

Harvest the benefits of INSV Defense

High resistance

High resistance to Impatiens necrotic spot virus (INSV).

Healthy crop

Healthy crops contribute to sustainable farming practices, reducing the need for excessive cost and time for pesticide treatments use and promoting environmental well-being.

Secure production

The benefit of secure production goes beyond quantity; it offers growers the peace of mind that their crops withstand virus attack and can be successfully harvested.


Lettuce varieties
with INSV Defense

Presenting two premium Romaine lettuce varieties fortified with INSV Defense: FARMIN RZ and JAMMIN RZ. These varieties express exceptional agronomical traits and cater specifically to the discerning requirements of the US market. Stay tuned for our ongoing development of additional INSV-resistant lettuce varieties, all easily identifiable by names ending in 'in'—ensuring top-notch quality for your agricultural needs.

INSV Defense lettuce varieties protect against the Impatiens necrotic spot virus (INSV). This virus is transmitted by the western flower thrips. INSV in lettuce causes characteristic patterns of chlorosis and necrosis on the inner leaves of the plant as well as significant stunting. INSV is a serious problem in the Salinas Valley, the key lettuce-producing area in the USA. A 2020 survey of 1,350 fields in the Salinas Valley revealed an average crop loss of 33% and a 100% loss in some fields. INSV Defense is a unique resistance in Rijk Zwaan’s Defense line.

What is INSV?

INSV a member of the genus Orthotospovirus and is closely related to the Tomato spotted wilt virus (TSWV). Transmission of INSV between crops has been attributed predominantly to the western flower thrips (Frankliniella occidentalis). The virus replicates within the insect vector and is transmitted to new plants by adult thrips as they feed on epidermal and mesophyll cells of susceptible host plants.

Why growers choose INSV Defense

Lettuce varieties with INSV Defense have a high resistance (HR) against INSV. This means that this resistance strongly restricts the growth and development of the specified pest under normal pest pressure in comparison to susceptible varieties. Highly resistant varieties may, however, exhibit some symptoms or damage under heavy pest pressure.


Trials prove the

In recent years, our dedicated team in Salinas, in collaboration with our esteemed partners, conducted extensive field trials. The conclusive findings revealed that our selected varieties show a high level of INSV resistance (HR), setting them apart from other susceptible varieties.
More information on INSV Defense
Nathan Peretz
More information on INSV Defense
Nathan Peretz
Crop Specialist