Neem's azadirachtin disrupts insect hormones, making it a potent repellent and growth regulator. The leftover neem cake after oil extraction is a fantastic soil amendment and nematicide. Honestly, I think lab studies overstate its field efficacy—in our village, pure neem spray alone often fails during heavy monsoon infestations. This practical mismatch is exactly why I’m researching synergistic blends for my thesis; I’ve seen my own appa mix neem cake with poultry manure for our areca palms, getting better results than any single lab compound promises.
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