Challenge your organic farming knowledge on natural pest control strategies for managing larvae. Explore environmentally friendly methods and their impacts on agriculture.
Which organism is commonly introduced in organic farming to control caterpillar larvae populations?
Explanation: Trichogramma wasps are effective for controlling caterpillar larvae by parasitizing their eggs. Ladybugs target soft-bodied pests like aphids, not larvae. Earthworms improve soil health but do not control pests. Honey bees are vital pollinators but have no direct role in pest control.
What is the main function of Bacillus thuringiensis (Bt) in organic pest management?
Explanation: Bt is a natural bacterium used as a larvicide to control certain insect larvae, breaking down their gut and causing death. It is not a fungicide or used to boost soil fertility (biofertilizer), and it does not regulate plant growth.
Why is neem oil a popular organic option against leaf-eating larvae?
Explanation: Neem oil contains compounds that interrupt insect larvae feeding and development, reducing pest impact. It is safe for most pollinators when used carefully, does not harm soil fertility, and does not play a role in photosynthesis enhancement.
How do row covers help reduce larvae infestations in crops?
Explanation: Row covers act as a barrier preventing adult insects from reaching plants to lay eggs, thus minimizing larvae issues. They do not attract birds, increase water retention, or serve mainly as shade covers in pest management.
How does crop rotation help in managing soil-dwelling pest larvae in organic systems?
Explanation: Crop rotation disrupts pest life cycles by introducing different plant species, making it harder for larvae that prefer specific hosts to thrive. It does not instantly kill all pests, alter crop taste directly, or serve primarily to replenish all soil nutrients.