How to identify and prevent aphids on your farm?

How to identify and prevent aphids on your farm?
How to identify and prevent aphids on your farm?

This blog offers comprehensive details on the effects of aphid infestation on crops and the most effective techniques farmers can employ to identify and avoid them on their fields.

Aphid infestation is a big headache for many farmers across the globe. These small, sap-eating insects will likely damage a healthy, well-established tree. Aphids affect not only fruit trees but also other kinds of trees, vegetable crops, and floral ornamental plants. It is critical to identify and treat aphids at the right time. Aphid treatments regularly will help you eradicate them and keep them away from your crops.


Damage symptoms

  • In temperate locations, aphids are among the pests that do the most damage to cultivated plants.
  • Many farmers are afraid of them since they can result in reduced yields, yellow, wilted leaves, stunted development, dense foliage, browning, and even plant death.
  • The nutrient-rich sap is sucked from plant stems by aphids. This weakens the plant and eventually kills it.
  • In addition, when they feed on the host plant, aphids spread fatal viruses. Citrus fruits are all easily affected by these viruses, for example- Citrus Tristeza viral disease.
  • Also, the leafhoppers are attracted to the honeydew that aphids secrete because it penetrates the skin and envelops the plant’s leaves, preventing them from receiving sunlight.
  • To spot an aphid infestation, look for signs like curled, stunted, or yellow leaves.
  • Aphids like to hide, so look underneath the leaves.
  • The presence of a sticky material on plant leaves indicates the presence of aphids that are sucking sap. This “honeydew,” a sugary liquid created as waste by insects, can draw other insects, such as ants, who gather the food scraps and defend the aphids from predators and parasites in exchange.
  • Honeydew promotes the development of a fungus called sooty mould, which turns branches and leaves black.
  • Feeding on aphids can cause malformed flowers or fruits. Some types of aphids induce galls to invade or escape the roots.
Honeydew formation in aphids
Honeydew formation in aphids

How to control these aphids?

Aphid control strategiesClassification
MonitoringMonitor the plants twice a week and look for all symptoms
Cultural controlPruning, weeding, sanitation
Biological control Release beneficial insects like lady beetles, lacewings, and parasitic wasps
Chemical controlUse of systemic insecticides, use of soap, oil etc.


  • When plants are growing quickly, check your plants for aphids at least twice a week to detect infestations early and knock, hose off, or trim them away.
  • In the late spring, when temperatures are slightly warm (65°–80°F), aphids cause great harm to the crops.
  • Once aphid populations are high and they start distorting leaves, eliminating these pests can be challenging because the curled leaves protect the aphids from insecticides and natural enemies.
  • Turning leaves over will help you find aphids because many species favour the underside of leaves. Trim leaves that are heavily infested.
Aphids control strategies
Aphids control strategies

Cultural control

  • The simplest way to control aphid populations that are concentrated on a few curled leaves or young shoots is to prune out these areas and eliminate them. Pruning these areas can make the habitat less hospitable because some aphids flourish in the dense inner shade of huge trees.
  • Knocking the insects off with a powerful water spray is another method for reducing aphid populations on strong plants. The majority of aphids that are dislodged won’t be able to return to the plant, and their honeydew will be rinsed away. Using water sprays in the morning enables plants to dry off quickly in the sun and makes them less vulnerable to fungal diseases.
  • Some aphids gather on weeds like sow thistle and mustard plants before migrating over seedlings of closely related crops once they emerge. However, these weeds with aphid infestations can occasionally serve as an early supply of natural aphid enemies. Always look for aphids on transplants and get rid of them before planting.
  • Never use more nitrogen than is necessary since high nitrogen levels in fertiliser encourage aphid multiplication. Apply nitrogen in smaller amounts over the course of the season as compared to all at once, using a less soluble form. Like urea-based time-release formulas, the best fertilisers are those with a slow release rate.
  • Since many vegetables are particularly vulnerable to significant aphid damage when they are young, it is best to grow seedlings indoors, in a greenhouse, or in the field under protective coverings before transplanting them when they are larger and more resistant to aphid feeding. This will help you minimise losses. Aphid-borne viruses can’t spread because of protective covers.
  • The spread of aphid-borne viruses in summer squash, melon, and other vulnerable vegetables has been successfully controlled by using silver-coloured reflective mulches. These mulches deter aphid populations from entering, hence lowering their numbers on young plants and seedlings. Another advantage is that vegetables planted in reflective mulch typically produce more since more solar energy reflects off the leaves.

Biological control

Natural enemies are species that use parasitism, predation, and other tactics to lessen the population of their enemy. The most crucial pest control tools are aphid-eating insects such as lady beetles, lacewings, syrphid flies, soldier beetles, and microscopic parasitic wasps. By offering them a suitable habitat, a source of water, and a variety of flowering plants, follow the directions below to draw them to your yard.

Natural enemies can flourish and complete their life cycles on flowers, offering them the necessary nectar, pollen, and shelter. When aphid concentrations are large, these beneficial insects offer the best management. If they are present in your field at an early stage, they can lessen the likelihood of an infestation.

List of helpful insects to assist in reducing aphids in your yard.

  • Provide resources for flowers: When aphid populations are low, plant blooms that offer the resources necessary for beneficial insects to sustain healthy populations. Choose flowers like alyssum, lavender, blanket flower (Gaillardia), cosmos, clover, buckwheat, and hyssop that are rich nectar providers.
  • Releasing helpful insects: Release lady beetles, lacewings, and parasitic wasps to create a colony of helpful insects in your fields.
  • Avoid using insecticides: To protect these beneficial insects, one should avoid using insecticides excessively.
Beneficial insects
Beneficial insects

Chemical control

  • A chemical insecticide may be required if all other management tactics have failed to keep the populations under control.
  • When applying insecticides, the objective is to pick one that won’t harm pollinators or other natural enemies yet is still effective against the pest insect. It should be remembered that even if insecticides kill the aphids, their dead bodies may still be present on the leaves following application.
  • If still, live aphids are present, more applications are only necessary. Wash the leaves with water to get rid of the dead aphids. Make sure you read and adhere to all label instructions before purchasing and using a pesticide.
  • Insecticidal soap or horticultural oil would be the top choices for effective spraying. The majority of times, when insecticides are required, insecticidal soaps and oils are the finest options. Oils might be generated from plants like neem or canola oil or petroleum-based horticulture oils. Since the main method of killing for these treatments is to suffocate the aphid, contaminated leaves must be well covered.
  • Additionally, systemic pesticides are employed to control aphids. These products are highly effective and particularly helpful for severe aphid infestations.


Farmers must manage and eliminate aphids from their fields to maintain their crops’ health. They should implement various control methods with the utmost care and at the appropriate times. However, the agricultural IoT sector has enabled farmers to monitor and control pest infestations remotely.

How can Fasal assist?

  • Aphids are deadly insects that may damage a crop in a few days. When pests like aphid strike, various factors are at play. The technology developed by Fasal, which is based on the idea of precision farming, keeps an eye on the crop, weather, and soil factors like soil moisture and leaf wetness to determine how well a plant is doing.
  • It continuously monitors these factors, identifying any inconsistencies and calibrating a solution in conjunction with its in-depth understanding of a crop’s ideal conditions. Fasal system sensors can pinpoint when a site’s soil is excessively damp, if rain is expected, or whether the temperature is ideal for a pest attack.
  • Fasal’s machine learning technology interacts with the crop using our farm-level data to alert farmers when their plants are at risk of pest infestation.
  • Our personalised advice lowers the need for fungicides while preserving crop quality, minimising unwanted environmental damage, and lowering overall crop management expenses.
  • Moreover, with the Fasal system, farmers may track their crops at various stages around the clock. We intend to revolutionise the agricultural sector and provide farmers with answers to all of their problems.

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