Different nematode species target different problems. Some are used against slugs, others against vine weevil grubs feeding on plant roots in containers and borders, and others against chafer grubs or leatherjackets damaging lawns. Because they are pest-specific, the right choice depends on identifying which pest is actually causing the damage.
Design has a big influence on how well a pond gets used. A shallow, gently sloping edge, sometimes called a beach area, lets amphibians and insects get in and out easily, and gives small mammals that fall in an escape route rather than a hazard. Planting in distinct zones, marginal plants at the shallow edge, floating plants across the surface, and oxygenating plants below, gives different creatures the cover and conditions they need.
Frogs and newts are useful garden residents, feeding on slugs and other insects, and their presence is generally a good sign that a pond is in reasonable health. Attracting them is mostly a matter of getting the habitat right rather than anything more involved.
Application is simple but does depend on getting the conditions right. Nematodes are typically mixed with water and applied with a watering can or hose-end feeder directly onto moist soil, since they need moisture to move through it and reach their target. Soil temperature also matters: most products need the soil to be above a minimum threshold, often around 5°C, to remain effective.
A pond set up with the right planting and shelter from the outset tends to attract amphibians naturally over time. Many gardeners begin with a considered selection of pond wildlife equipment chosen to suit the size of pond they are working with.
Shelter is often overlooked. Many UK bee species are solitary rather than hive-dwelling, related web site and a patch of bare, undisturbed soil in a sunny spot can serve as nesting ground for mining bees, while hollow stems and drilled wood blocks suit species that nest above ground. Choosing biological pest control over chemical sprays around flowering borders also helps protect the insects visiting them.