Identification comes before treatment

The most common mistake we see among new growers is applying a treatment before correctly identifying the actual problem. Aphids, whitefly, fungal leaf spot, and simple nutrient deficiency can all produce similarly discouraging results — yellowing leaves, stunted growth — but each requires a different response, and treating the wrong problem wastes time and money while the real issue continues unchecked.

Common pests on member plots

Aphids and whitefly are the most frequently reported pests among our members, particularly on kale and other brassicas, appearing as small clustered insects on the underside of leaves or a sticky residue on the plant surface. Caterpillars, particularly on brassicas, and cutworms attacking young seedlings at soil level round out the most common problems reported at our training sessions.

Low-chemical control methods

For most common pests, we teach control methods that avoid heavy chemical pesticide use, both for cost reasons and because many members are growing food for their own household to eat. A simple soap and water spray, applied directly to aphid and whitefly infestations, disrupts their outer coating effectively without harming the plant.

Companion planting — marigold, onion, and garlic interplanted among vegetable beds — helps deter several common pests through scent, and encouraging natural predators like ladybirds by avoiding broad-spectrum pesticide use gives a garden its own ongoing pest control system over time.

When to escalate

For persistent or unfamiliar problems that basic methods do not resolve, we connect members with county agricultural extension officers, covered in a separate article, who can provide more specific diagnosis and, where genuinely necessary, guidance on appropriate targeted chemical treatment used correctly and safely rather than as a first resort.

Building a simple pest monitoring habit

Beyond reacting to a visible pest problem, we encourage members to build a simple, brief weekly habit of actually checking their plants — turning over a few leaves to look at the undersides, checking the base of a few plants for cutworm damage — rather than only noticing a problem once it has already visibly damaged the crop. This kind of proactive monitoring, taking only a few minutes, catches most infestations at an early, easily manageable stage rather than after they have spread significantly across a bed or sack.

Members who have adopted this habit consistently report catching problems earlier and needing less intervention overall to manage them, simply because early-stage aphid or whitefly populations respond far more easily to a simple soap spray than an infestation that has been left to establish and spread for a week or two unnoticed.

When a pest problem spreads between neighbouring plots

Because many of our members farm in close proximity within Babadogo, a pest problem on one household's plot can spread to a neighbour's plot relatively quickly, particularly for airborne pests like whitefly. We encourage members who notice a significant infestation to mention it informally to nearby member households, giving neighbours a chance to check their own plots early rather than discovering the same problem only after it has already established itself.

This kind of informal neighbour-to-neighbour communication, while not a formal program, has become a genuinely useful part of how pest problems get contained within the community rather than spreading unchecked from plot to plot.

Prevention remains cheaper and more reliable than treatment for nearly every pest and disease we cover in training. Healthy, well-spaced plants growing in good soil with adequate but not excessive water are simply less vulnerable to begin with, which is why pest management training at Green Revolution Farmers always circles back to the same fundamentals covered in our soil health and water conservation articles. We continue to update our pest management guidance as new pest pressures emerge or as members report a control method working particularly well under specific local conditions, treating this training, like most of what we teach, as something that improves gradually with accumulated member experience rather than a fixed, unchanging curriculum. We would add that even our most experienced growers occasionally encounter a pest problem they cannot immediately identify, and treating this as a normal, unremarkable part of farming rather than a personal failure helps new members stay calm and methodical when it happens to them.

Key takeaways

  • Correct identification must come before treatment — different problems need different responses.
  • Aphids and whitefly are the most commonly reported pests on member kale plots.
  • Soap-and-water spray and companion planting control most common pests without heavy chemicals.
  • Persistent or unfamiliar problems should be escalated to a county extension officer.

Frequently asked questions

What's a low-cost way to control aphids and whitefly?
A simple soap and water spray applied directly to the infestation disrupts their outer coating without harming the plant or requiring commercial pesticide.

Which plants help deter pests when interplanted?
Marigold, onion, and garlic interplanted among vegetable beds help deter several common pests through scent.

How often should I check my plants for pests?
A brief weekly check, including looking under leaves, catches most problems early enough to manage easily.

Are the low-chemical methods described here effective against all pests?
They handle the great majority of common pests our members encounter, though persistent or unusual infestations may need the escalation path described above.