As a plant enthusiast, you’ve likely encountered pests or diseases that have impacted the health of your potted plants or garden; this is part and parcel of plant ownership.
Plants face plenty of threats, from insects (aphids, mealybugs, whiteflies, beetles, and more) to viruses, bacteria, and fungi. Without treatment, entire crops can be wiped out with staggering costs: Plant diseases cost the global economy $220 billion in 2023, and invasive insects did $70 million worth of damage.
Products that prevent, reduce, or destroy pests have been around since as early as the 8th century BC, when salt sulfur compounds were used to protect crops threatened by insects and mites. These pesticides have evolved over time, and today, you’ll find a range to choose from. Each has different properties and can vary in its cost, effectiveness, and environmental impact.
When it comes to pesticides there are three main chemical groups that defend and protect against harmful pests. These include systemic, translaminar, and direct chemicals. In this article we discuss each group to help you determine which is best for you.
Systemic Pesticides: Treatment From Within
Like the name implies, systemic pesticides impact the biology of the plant. The pesticide works its way through the plant’s vascular system as it transports the chemical from roots to tip, absorbing into its tissues, impacting the plant’s stem, leaves – including new shoots – the flowers, fruit, and even the pollen it produces. Systemic pesticides are water-soluble and can be added to soil for plants to absorb. This chemical group can provide a strong defense against diseases and insects at any stage of growth.
Because it is applied via the soil, a systemic pesticide mixes with the sap of the plant, which kills pests and fungus that feed on the sap.
With this chemical working inside the vascular system, it is within the plant tissue – meaning it cannot be washed off or removed. Plants treated with systemic pesticides are toxic, not only to the pests they target but also to beneficial insects and pollinators, and any animal or human ingesting the plant and its fruit.
This has dangerous repercussions on the entire insect population, and are particularly damaging to bees. Systemic pesticides include neonicotinoids, which, even in low concentration, are toxic to bumble bees, honey bees, and solitary bees. They don’t just harm the existing population: systemic pesticides have been shown to impair reproductive capacity, flight, navigation, learning, and the bees’ immune responses. This has disastrous implications for future bee populations—and with it, the environment as we know it.
Because these chemicals are water soluble, they seep into and contaminate the soil, groundwater, nearby streams, and waterways, poisoning pollinators, birds, fish, and aquatic life that come in contact with them.
Translaminar Pesticides: Topical Treatment
Unlike systemic pesticides that become embedded in the tissue of the entire plant, translaminar pesticides remain localized in one area of the plant — typically the leaves. Translaminar chemicals are applied to the foliage, where they stay to kill the pests that feed on the leaves.
By remaining in the leaf tissues, these pesticides provide an ongoing fight against several types of plant-eating pests and tend to last longer than contact pesticides.
Translaminar solutions are also less expensive than systemic pesticide varieties and while they are less effective, they still pose a threat to both humans and the environment. Beneficial insects like butterflies, ladybugs, and bumblebees are harmed when they come in contact with the residue on the leaves. And when the pesticide is inside the leaf tissue, it cannot be washed off or removed, making it toxic to humans and animals that may eat the leaves.
Direct Pesticides: Targeting the Source
Systemic and translaminar pesticides protect against plant threats from the inside out. Direct pesticides are applied directly to an area of a plant with an existing infestation to kill pests and fungi and are an effective and quick way to protect against additional damage. These pesticides kill on contact, then linger on the plant surface to repel other invaders, but their residue can be rinsed off, making produce that’s been treated with these chemicals somewhat safer to eat depending on the ingredients of the pesticide.
If developed with toxic chemicals, direct pesticides can still impact the environment, leaching into soil from rain and watering, impacting groundwater and affecting the health of nearby streams and aquatic life. These pesticides are harmful to targeted pests, but also pose a risk for humans, pets, and beneficial insects, pollinators, and fish.
Even substances like Neem oil, a biodegradable, non-toxic direct pesticide that has been used for decades, can be harmful to plants, people and the environment. Neem oil can burn plant foliage and should not be sprayed on recently transplanted or stressed plants. It can contaminate plants, reduce their yield, and change their smell and taste.
Regardless of which type of pesticide is used – systemic, translaminar, or direct – the targeted pests and viruses can build an immunity to the chemicals, ultimately making pesticide treatment less effective.
GrowSafe: Stops Pests & Diseases Safely
Fortunately, there is one effective pest treatment that is safe for people, pets, the planet, and the plants. GrowSafe is a product applied directly to infested plants that kills pests and disease on contact.
GrowSafe is a biodegradable product made from food-grade corn, soybean, sunflower and coconut oils and citric acid. The application of the product thoroughly coats impacted plants with this proprietary mixture and suffocates pests and diseases, killing them on contact.
Due to its all-natural ingredients, GrowSafe won’t harm the environment if it gets into the soil and, importantly, the product is safe for people, pets, pollinators and beneficial insects that come into contact with the treated plant. Further, treatment will not change the smell or taste of herbs and botanicals, fruits, or vegetables.
Integrated Pest Management: One More Tool in the Arsenal
Environmentally responsible crop management requires more than safely controlling unwanted pests and diseases. Integrated Pest Management (IPM) practices promote sustainable farming while promoting biodiversity, and involves integrating several methods working together to control crop damage.
IPM involves strategies like dense crop planting to minimize the space for weeds to grow. Planting seeds close together helps the plants crowd out weeds, which also maximizes yield and results in better higher revenue.
Another element of IPM involves strip cropping – planting different crops in strips of the same plot of land to minimize pests destroying an entire crop. Also known as intercropping, this practice helps control pests who find it difficult to locate a host plant. An additional benefit: This type of farming may actually attract and maintain beneficial insect populations.
Timing is everything in IPM. By timing the planting season to avoid peak pest infestation periods, the crop avoids the worst of the onset and is less likely to suffer damage – yielding healthier plants that require less treatment.
Sustainable farming promotes biodiversity. When integrated with IPM practices, GrowSafe helps control pests and keep the soil fertile, while protecting the plant and the environment.
By combining the all-natural GrowSafe pest treatment with the ecologically balanced farming practices of IPM, biodiverse ecosystems are better balanced and preserved -– controlling damaging infestations while protecting our soil and water systems and ensuring our food is safe and stable.
The Bottom Line
We’ve looked at a variety of ways to treat pests and infestations that infect and destroy plants. These threats wreak havoc on crops. But using toxic systemic, translaminar, or direct pesticides causes long-term damage that lasts far beyond the life of an individual plant and can have irreversible consequences on our climate.
Using a non-toxic direct pest treatment that is as effective as it is safe can be the difference between a rich biodiversity that thrives and a weakened ecological scenario in which current and future populations are adversely impacted. GrowSafe, applied directly to the infected area of a plant, zeroes in on the targeted pest without damaging the plant itself or those who come in contact with any part of it. Safer soil, water, and food systems support our health and our environment.
Familiarizing yourself with the varieties of pesticides and understanding how they work will help you make an informed decision. Of course, if you have questions or want to learn more about pesticides, please reach out to us. We are here to help you keep your plants healthy and thriving!