John KempfRegenerative Agriculture Entrepreneur

An ounce of prevention is worth a pound of cure

21 Mar 2026 · 1 min

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In this brief video, the speaker compiles guidance from several university extension services (University of Florida IFAS, University of Nevada, Illinois Extension, and Utah State University) that links excessive nitrogen fertilization to increased aphid and whitefly infestations. The agencies explain that nitrogen‑rich, rapidly growing plant tissue is especially attractive to these pests. To mitigate the problem, they recommend limiting overall nitrogen rates, using split or staggered applications of lower‑concentration or delayed‑release nitrogen fertilizers, and strictly following recommended application rates. The overall message is that proactive nitrogen management serves as a preventive measure against pest outbreaks.

Chapters

We have Ask IFAS from University of Florida that says, "Too much nitrogen, however, can make plants more inviting to aphids and whiteflies." We have University of Nevada saying, "Avoid over-fertilization with nitrogen fertilizer, especially in the spring. This helps to prevent the rapid growth of soft nitrogen-rich tissue, which is very attractive to aphids." Illinois Extension: "Aphids thrive on nitrogen-rich plants, so reducing nitrogen fertilization can slow population growth." Utah State University, which says manage nitrogen levels. High levels of nitrogen fertilizers tend to encourage aphid reproduction. Use several staggered applications of lower concentrations of nitrogen rather than a single high dose. Also use delayed release formulations. Following the rates and using split applications are the first two ways to monitor and control your nitrogen.