A new, cheaper method of manufacturing artificial pheromones could allow more farmers to add this weapon to their arsenals for crop protection.
and other wildlife. Meanwhile, insects have already evolved resistance to many pesticides, forcing farmers to apply even more.
The pheromone mating call is usually a mixture of compounds. Traps are designed to attract a particular species—to monitor for the presence of a pest, for example—so a precise cocktail is usually needed. But to sabotage mating, a broad-spectrum component can work because many related species use the same basic compounds as pheromone components.
That’s why pheromones are typically only used to protect crops that require relatively little land to turn a decent profit, such as fruits and nuts. Farmers who grow crops that don’t sell for as much per hectare, such as corn or soybeans, often can’t afford to use pheromones to defend their vast fields. It also requires some experience to deploy pheromones effectively.
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