Biological Pest Control: Nematodes As A Chemical-Free Option

Leaving a few deliberately untidy corners does more good than a uniformly neat border. A patch of long grass, a stack of logs left to slowly rot down, and leaf litter left in place over winter all provide shelter for insects, amphibians and small mammals that a fully cleared garden simply cannot offer.

Birds need consistent feeding through frosty spells, when natural food sources are hardest to find and energy demands are highest. Keeping feeders topped up, and providing water that is not frozen over, matters more in a hard frost than at almost any other point in the year; a small area gently melted with warm water is a better approach than breaking ice by force.

Feeding is straightforward but worth getting right. Meaty cat or dog food, or a specialist hedgehog food, is a better choice than bread and milk, which can cause digestive upset. A shallow dish of fresh water left out overnight is just as useful as food, particularly during dry spells in summer.

Placement decides whether the house gets used at all. A fixed position at around waist to head height, facing south or south-east to catch the morning sun, and sheltered from driving rain and strong wind, gives insects the stable conditions they need. Once occupied, the house is best left undisturbed through the nesting and overwintering period.

Nematodes are microscopic roundworms that occur naturally in soil, and certain species have been developed for use against specific garden pests. Rather than acting as a broad chemical treatment, each nematode species is matched to a particular pest, seeking it out and interrupting its lifecycle with far less impact on the rest of the Garden Wildlife .com than a chemical spray.

Food choice should shift with the seasons. High-fat foods such as fat balls and suet blocks suit the colder months, when birds need extra energy to maintain body heat. During the breeding season, softer foods and mealworms are more useful, since adult birds feed these to chicks that cannot yet manage tougher foods. Sunflower hearts work well year round and avoid the mess of husks left by whole sunflower seeds.