Boothman, of Boothmans Agriculture in Bourne, South Lincolnshire, has advised growers to use Meta-metaldehyde slug pellets that have the meta quality logo.
The logo on these products - such as Certis' Trigger, which contains five per cent metaldehyde - indicates that the pellets have met exacting standards.
Boothman said: "Poor-quality pellets will lay exposed to rain or irrigation and act like a sponge to soak up water. As soon as this happens the pellets become less palatable and can completely break down.
"Metaldehyde pellets also have less detrimental impact on natural slug predators and beneficial insects - a key advantage over some alternatives.
"It's a real bonus that the pellets do not harm carabid beetles or earthworms, and break down into harmless by-products once they have done the job."
Lincolnshire-based grower Peter Thorold, who produces 440ha of potatoes, Brussels sprouts, calabrese, cabbage and cauliflower, agreed that quality is vital to achieve good control first time.
He added that variable pellet size, cracked or broken pellets can increase dustiness and lead to uneven spreading. Incomplete coverage can lead to slug damage and product rejection, he said.