1 | INTRODUCTION
Vegetable growing has become a highly specialized and intensive activity. As a result of the ever increasing demand for better quality, vegetable growers and plant raisers require the best quality possible of the basic material. The demand for specific seed forms and more information about seed quality has greatly increased in order to improve emergence and plant-stand.
Seed is a natural product. Varying environmental conditions influence the final results. It is therefore often not possible to give precise information about emergence. To meet the wishes of customers as much as possible, Bejo has drawn up quality standards for the various seed categories. The table therefore shows the specifications as a guideline to what can normally be expected.
The germination percentages mentioned are Bejo’s minimum required figures and are drawn up according to ISTA methods and tolerances. In cases where the seed does not confirm with these product specifications Bejo will inform the customer.
2 | GENERAL DEFINITIONS
In general, normal seed has not been subjected to special processes. It is sold by weight and/or by count, depending on the product. Normal seed complies with national standards.
Precision seed has been subjected to additional processes. It has a uniform size and high germination. Precision seed is sold by count.
Priming is defined as an activation of the germination process with the purpose to obtain faster or more uniform emergence after sowing. Primed seed is sold by count.
Pelleting is defined as the process of changing the seed form by covering it with a material, the main purpose being to improve uniformity of size and shape resulting in improved sowing ability. Also additional ingredients may be added. Pelleted seed is sold by count.
Filmcoating is a full covering, usually pigmented layer, around the seed. The original seed form remains intact. Additional ingredients may be added. Filmcoating treatments that contain insecticides are normally identifiable by color coding. Filmcoated seed is sold by count.
Basic coating is a process which fixes the applied crop protection products in an almost dust-free manner to the seed. A green pigment is added.
Germination figures relate to ISTA procedures and are valid at the time of despatch.
The percentage of plants from a seed lot that meets the variety description.
3 | SEED HEALTH REQUIREMENTS
In order to supply sufficiently healthy vegetable seeds and in order to meet the requirements of EU Council Directive 2002/55/EC, Bejo uses various disease risk management strategies to prevent and control seed transmitted diseases. These may include and are not limited to seed health testing programs, protected seed production, field inspections, seed treatments and other effective seed disinfection methods.
ISHI-Veg has developed the Manual of Seed Health Testing Methods, which includes state of the art seed health testing protocols. Bejo follows the ISHI-VEG recommended minimum sizes of a representative sample for seed health testing.
Information regarding the ISHI-Veg seed health test protocols and recommended minimum sample sizes can be found at: http://www.worldseed.org/isf/ishi_vegetable.html or can be sent to you on
4 | DEFINITION OF THE TERMS DESCRIBING THE REACTION OF PLANTS TO PESTS OR PATHOGENS
Adopted by the Vegetable Seed Section of ISF on May 28, 2004.
Differing degrees of specificity exist in the relations between plants and pests or pathogens. Identification of such specificity generally requires the use of highly elaborate analytical methods. Recognizing whether a plant is subject to a pest or pathogen or not may depend on the analytical method employed. It is important, in general, to stress that the specificity of pests or pathogens may vary over time and space, depends on environmental factors, and that new pest biotypes or new pathogen races capable of overcoming resistance may emerge.
Immunity: not subject to attack or infection by a specified pest or pathogen.
Resistance: the ability of a plant variety to restrict the growth and development of a specified pest or pathogen and/or the damage they cause when compared to susceptible plant varieties under similar environmental conditions and pest or pathogen pressure. Resistant varieties may exhibit some disease symptoms or damage under heavy pest or pathogen pressure.
Two levels of resistance are defined:
high resistance (HR): plant varieties that highly restrict the growth and development of the specified pest or pathogen under normal pest or pathogen pressure when compared to susceptible varieties. These plant varieties may, however, exhibit some symptoms or damage under heavy pest or pathogen pressure.
intermediate resistance (IR): plant varieties that restrict the growth and development of the specified pest or pathogen, but may exhibit a greater range of symptoms or damage compared to high resistant varieties. Intermediate resistant plant varieties will still show less severe symptoms or damage than susceptible plant varieties when grown under similar environmental conditions and/or pest or pathogen pressure.
Susceptibility: the inability of a plant variety to restrict the growth and development of a specified pest or pathogen. The germination figures stated in our product specifications are the minimum standards applied by Bejo Zaden. Bejo Zaden will inform its customers in cases where seed fails to comply with the product