Final answer:
B. Chickens are used at Cognito Farm to control fly larvae in the pasture, as part of a biological control strategy to reduce the need for synthetic chemical pesticides and protect the environment.
Step-by-step explanation:
At Cognito Farm, they use chickens to control fly larvae in the pasture. Chickens serve as biological control agents by consuming the larvae, thus helping to manage the pest population naturally. This method fits within a broader spectrum of organic and sustainable farming practices, which aim to maintain ecological balance and reduce reliance on synthetic chemicals. Many farms and agricultural systems now employ varied natural strategies like these, which include the use of fungal insecticides and other biological control tools. These methods provide several advantages, as they not only effectively manage pest populations but also help in protecting the environment, lowering costs, and reducing the impact on non-target species such as pollinators and beneficial predators.
Biological control methods are considered an attractive option because they reduce the need for synthetic chemical pesticides, which can harm beneficial insects, pollinators, and the environment. Furthermore, they enhance biodiversity by introducing species that prey upon and destroy pest species and thus can contribute to a more sustainable and eco-friendly agricultural system. Organic farming often integrates these practices, but it is important to research the specific methods and substances used, as some naturally derived pesticides may still be harmful to certain non-target organisms.