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Velum Prime brings a new mode of action to potato cyst nematode (PCN) control. Containing fluopyram and applied at just 250g of active substance per hectare it delivers high intrinsic activity at an unprecedentedly low application rate compared with conventional nematicides.

Here are three ways to get the best from this innovative new solution.

1. Sample first

Accurate testing and analysis is the foundation of good PCN control. Sampling and testing not only shows if PCN is present, but also what species is present in the soil. This information, coupled with that of the resistance/tolerance of the varieties available to grow, is vital for the effective management of PCN. The information you request from the laboratory, and what you do with the results will vary depending on what situation the field is in – for example, are you trying to detect an early stage infestation or an established one?

The AHDB has produced an excellent guide to sampling and analysis

2. Choose your programme

PCN is a complicated pest. As well as the initial population count other factors such as variety, soil type and field / farm history all contribute to what could be described as PCN pressure in a particular field. All of these considerations will need to be taken into account to make an informed judgement on treatment options.

In higher pressure situations, a conventional nematicide applied at full-rate typically produces a greater yield response than that of Velum applied on its own. So in those situations, we would recommend using full rate Velum plus a half rate of a granular nematicide. In our trials, the programme has been robust, consistent and on average at least as effective as full rate granules used alone for yield protection.

Use of Velum alone is more suitable under lower PCN pressures. In trials, Velum has provided PCN population management in line with existing standards.

Velum will typically cost around half that of granular nematicides, making both the programme and its use alone cost effective compared with granules.

3. Follow application guidelines

The application method for Velum is for it to be applied as an in-furrow spray at the time of planting. The recommended rate is 0.625L/ha (250g active substance/ha). Water volumes, according to the label, should be 200-500L/ha, but these can be reduced to 100L/ha, if desired.

The spray should be directed into the furrow at planting and not onto the seed tuber.

A typical set up is to apply using two nozzles per row: one at the front of the planting share and directed down into the furrow with the second at the rear of the share and directed so to spray the soil as it closes around the planted furrow.

 

 

 

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