Root knot nematodes or eel worms are those hidden annoyances that you dont really know that youve got them until its too late. Root knot nematodes are a microscopic parasite that sucks the life out of your plants. If a plant collapses for no reason (looks like it needs watering but doesnt), looks droopy but bounces back in the evening, is generally failing to thrive and you get these little nodules on the roots it’s probably likely you have an infestation of them. Be aware that some nitrogen fixing nodules on beans and peas look very similar.
Recently I noticed some swiss chard struggling to take off. I thought perhaps I wasnt watering enough or I had planted too close. I decided to relocate a couple and thats when I found the problem.
Barbara Karst Bougainvillea plants are known for their vibrant colorful blooms that can brighten up any garden. However, these gorgeous plants can fall victim to tiny pests called nematodes that attack the roots and cause major issues. If you notice your Barbara Karst Bougainvillea looking a little worse for wear with stunted growth, yellowing leaves wilting, and other problems, nematodes may be the culprit. Getting rid of these microscopic worms can be challenging, but there are several effective methods you can try to revive your plant.
Identifying a Nematode Infestation
The first step is confirming that nematodes are indeed damaging your Bougainvillea’s root system. Check for small galls or knots on the roots, which are indicative of nematodes. You may also notice gradual overall decline of the plant. Other clues are moist soil that dries out quickly and excessive number of roots compared to plant size. To be 100% sure take a soil sample to your local agricultural extension office for analysis. Once nematodes are confirmed you can move ahead with treatment.
Going the Natural Route
When dealing with any kind of pest, an eco-friendly approach is ideal for the health of your plant and the environment. Here are some all-natural ways to conquer nematodes:
Neem Oil
Derived from the neem tree, this natural oil can eliminate nematodes and other pests when mixed with water and poured onto the soil surrounding your Bougainvillea. Always follow instructions on the neem oil product.
Marigolds
The roots of marigolds release nematode repelling compounds into the soil. Plant them around your infected Bougainvillea for protective benefits.
Diatomaceous Earth
This powder made from crushed fossils kills nematodes by absorbing oils in their bodies, leading to dehydration. Lightly sprinkle on soil and reapply after watering.
Organic Compost
Compost introduces helpful microbes that can outcompete and displace nematodes in the soil. Mix in compost around the roots every month or so.
Biofumigants
Certain cover crops like mustard, radish, and arugula can be grown and tilled into the ground to release biofumigants that fight nematodes.
With persistence using these natural techniques, you can eliminate nematodes and revitalize your Bougainvillea without using harsh chemicals. Be patient, as results won’t happen overnight.
Chemical Options for Nematode Eradication
For serious nematode infestations, you may need to break out the big guns in the form of targeted chemical treatments. Use extreme care with pesticides, following all label precautions. Here are powerful chemical options:
Nematicides
These are synthetic pesticides designed specifically to kill nematodes on contact without harming plants. Apply as directed on package.
Fumigants
These specialized chemicals in liquid or gas form can sterilize the soil to wipe out all nematodes if the infestation is severe enough.
Chloropicrin
Related to fumigants, this chemical can penetrate soil to depths of one foot or more to destroy nematodes. Use with caution as it is very strong.
While chemicals yield fast and effective results, they do disrupt soil life, so explore all natural routes first. Only use pesticides as a very last resort if nematodes persist.
Preventing Nematodes in the First Place
Stopping a nematode invasion before it starts is the ideal approach. Here are some tips to keep these pests from ever taking hold:
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Sterilize all gardening tools to prevent spread between plants
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Carefully inspect any new plant additions to your garden
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Use nematode-resistant Bougainvillea cultivars
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Rotate Bougainvillea with other plants each season
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Maintain proper soil pH and nutrient balance
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Remove and destroy infected plant debris
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Allow soil to dry out thoroughly between waterings
By depriving nematodes of their ideal environment through prevention, you can keep them away from your Bougainvillea’s roots for good.
Dealing with destructive nematodes in your prized Barbara Karst Bougainvillea can be disheartening, but there are many techniques, both natural and chemical, that can solve the problem. Identify symptoms promptly, then implement the above strategies to restore the health and vigor of your Bougainvillea. With persistence and nematode prevention, your plant will soon be thriving once again, showing off those signature colorful blooms.
Plant things they don’t love
Instead of wasting space with green manure or time with fallow ground, we opt to plant things they dont take an interest in.
Brassicas (broccoli, cauliflower, kale, cabbage, kohlrabi, turnips, bok choi, radish etc), Mustards, Corn, french marigolds and Leeks are our go to crops. They also hate asparagus if you have them pop up in a perennial bed.
Bio fumigate Green Manure
You can purchase special green manure crops that are said to eradicate them. These generally include a mix of brassicas (mustard in particular). Generally these are things they dont like when they start to decompose (a substance known as isothiocyanate).
With this kind of green manure crop its important to dig it in not just chop and drop, which unfortunately is going to disturb a whole lot in your soil so keep this in mind as essentially youre going to have to build up the soil again.
Bougainvilleas 101
FAQ
What kills nematodes naturally?
What repels nematodes?
How do you treat nematodes infestation?
When to plant Barbara karst bougainvillea?
Choosing the Right Time and Location: The best time to plant your Barbara Karst Bougainvillea is in spring or early summer after the danger of frost has passed. Select a location that receives full sun, ideally at least 6-8 hours of direct sunlight daily. Bougainvillea thrives in warm temperatures. Ensure the planting site has well-draining soil.
How do you care for Barbara karst bougainvillea?
Barbara Karst Bougainvillea is a fast growing plant and may deplete the nutrients in its soil over time. Replenish them with a gentle organic fertilizer or compost every 1-2 months depending on your location and season. Fertilize more often during the growing season and in warmer and brighter climates.
Why does my Barbara karst bougainvillea lose its leaves?
There are times when my Barbara Karst Bougainvillea loses its leaves, particularly if it gets too cold. It’s a semi-deciduous plant, which means it can shed its leaves in response to stress, like a drop in temperature or insufficient water. However, once the conditions improve, it usually bounces back with new growth.
How do you care for a bougainvillea plant?
Adding a handful of perlite to regular store-bought potting soil should do the trick! Barbara Karst Bougainvillea is a fast growing plant and may deplete the nutrients in its soil over time. Replenish them with a gentle organic fertilizer or compost every 1-2 months depending on your location and season.