FIRST LOOK - Marinice Tomato

This is your exclusive sneak peek at De Ruiter® seed innovation as we continue to optimize and learn about this variety.

Previously trialed under pre-commercial designation DRTH1011. Information is based upon the glasshouse trial data from 2018 and 2019 from 2 external locations and 1 internal location with 6 to 9 assessments of 50 to 250 plants, except where otherwise indicated.

Answering the high-tech greenhouse industry’s call for a versatile large truss tomato, Marinice is an exciting in-development tomato on vine variety from De Ruiter® brand. This masterpiece in the making delivers a jointless large truss tomato with great internal and external color as well as shape, even with its large size.

Marinice is a dual-purpose variety suitable for artificial lights and regular crop cycles, making this versatile tomato a great alternative to Merlice and Komeett in variable growing conditions. 

Performance indicators in trials show strong plant vigor, fruit shape and size for this long-enduring crop.


  • Replacement option to Komeett and Merlice
  • Great internal color
  • Shiny, well-shaped fruits
  • Large size
  • Dual-purpose crop cycle includes winter crop cycle and Jan - Dec crop cycle
  • Good truss and fruit quality throughout cycle
  • Premium plant vigor
  • Very good disease resistance package, including intermediate resistance to powdery mildew 


Disease resistance package

  • HR: ToMV:0-2/ToTV/Ff:A-E/Fol:1,2/For/Va:1/Vd:1; IR: On
  • Due to its intermediate resistance, Marinice will potentially offer growers flexibility in managing Powdery mildew.
  • Marinice offers a good disease resistance package, including high resistance to Fusarium and Verticillium wilt.

Plant vigor

  • Marinice is a high-vigor variety. Slightly stronger than Merlice, Marinice requires more generative action, especially early in the season. When transplanted in an artificial light crop cycle with high light levels, it can be extremely vegetative and vigorous, so specific crop generative care is recommended for best results. 
  • Due to its high plant vigor and disease resistance package, Marinice has the potential to endure and produce well until the end of crop cycles, delivering good fruit quality.
  • Marinice has an open plant aspect, which can facilitate labor. 
  • Grafting on a generative rootstock is recommended for better balance and peace of mind early in season. 
  • Grafting on a vigorous rootstock can be done but is not recommended if grown into winter crop cycles using artificial light, unless a nutrition plan and crop work are in place to counter Marinice’s vegetative behavior. The same applies, to a lesser extent, for regular crop cycles (January through November). If grafted on a strong rootstock, Marinice must be well managed due to its vegetative behavior early in the season. 
  • Non-grafting is an option. However, crop cycle and growing conditions must be considered.

Yield potential and production behavior

Due to its vegetative behavior, Marinice is expected to start producing days later and more slowly than more generative varieties. Applying generative action can greatly minimize this gap. However, it has the potential to increase production to deliver strong results in the mid-late crop cycle.

Fruit weight & Quality

  • Marinice delivers very nice, shiny fruits with color that shifts from slightly dark green to orange then red. Its overall fruit quality is very good. 
  • At its best, Marinice has the potential to deliver distinctly heavier fruits than Komeett and Merlice. Fruit quality in the fall is quite positive with less blocky fruits than Komeett and better overall coloring than Merlice.
  • The presence of fruits known as “boats” have been spotted in all trials performed from 2017 to date. Steering the crop generatively can make a big difference in minimizing their presence.


Due to coloring performance observed in trials, Marinice requires a dedicated nutrition plan, including a reviewed concentration of potassium, calcium and magnesium in the fertilization program. Timely leaf removal helps improve plant performance, including its response to nutrition.

Performance may vary from location to location and from year to year, as local growing, soil and weather conditions may vary. Growers should evaluate data from multiple locations and years whenever possible and should consider the impact of these conditions on the grower’s greenhouse. Any recommendations in this article are based upon glasshouse observations and feedback received from a limited number of trials and locations. These recommendations should be considered as one reference point and should not be substituted for the professional opinion of agronomists, entomologists or other relevant experts evaluating specific conditions.
Bayer, Bayer Cross Design and De Ruiter® are registered trademarks of Bayer Group. ©2019 Bayer Group. All rights reserved.
Ff: Lead mold
Fol: Fusarium wilt
For: Fusarium crown and root rot
ToMV: Tomato mosaic virus
On: Powdery mildew
Va/Vd: Verticillium wilt
HR = High Resistance
IR = Intermediate Resistance
To find out more about disease resistance and the applicable levels of disease resistance, visit
De Ruiter® is a trademark of Bayer Group. ©2019 Bayer Group. All rights reserved.