Timing is of utmost importance – apply when the soil temperature is above 55 degrees and the soil is moist. "Releasing them on a cloudy day or early in the morning or evening is useful as they are sensitive to ultraviolet (UV) light from the sun," Rosetta noted. The nematodes do not usually last through the winter.

When should I use nematodes on vine weevil?

The nematodes seek out and kill vine weevil larvae. Apply when the larvae are active in late Spring and early Autumn. High infestations may need two applications. Apply to pots and open ground March to May and August to October.

How long does it take for vine weevil nematodes to work?

The nematodes then reproduce inside the dead pest and release a new generation of hungry infective nematodes, which disperse and search for further prey. Nemasys Vine Weevil Killer will kill larvae present in the area and protect against further larvae damage for up to four weeks. What is Nemasys Vine Weevil Killer?

How do you apply vine weevil nematodes?

Apply directly to the soil around the roots which is where the larvae will be feeding. Nemasys® Vine Weevil Killer is a perishable, living product, so it must be used before the expiry date (which is marked on the inside of the pack and will be around 2-3 weeks) and should be stored in the fridge until it is needed.

What is the best treatment for vine weevil?

Vine weevil control and treatment

• It is best to physically remove them. Collect them at night by torchlight, whilst they are feeding. ...
• Use a specially formulated vine weevil chemical control on ornamental plants in pots or containers. Spray the plants with a systemic and contact insecticide* at dusk on mild evenings.

Nemasys Vine Weevil Killer Application

32 related questions found

How do you get rid of vine weevils naturally?

12 Natural Ways to Get Rid of Black Vine Weevil in Garden

1. Remove Mulch. As the black weevil prefers heavily moist soil, removal of mulch and other compost materials and items may be necessary. ...
2. Diatomaceous Earth. ...
3. Natural Predators. ...
4. Pick Them Off. ...
5. Repellent Plants. ...
6. Sticky Traps. ...
7. Beneficial Nematodes. ...
8. Limit Excess Watering.

Where do vine weevils go during the day?

Vine Weevil Life Cycle

The adults are nocturnal, hiding during the day at the base of plants, under plant pots or hidden in debris. They can often be found inside houses.

What plants do vine weevils not like?

Which plants do vine weevils not like? Plants with fragrant leaves seem to be less frequently attacked by adult weevils. Plant Lavender, Lemon Balm, Geranium macrorrhizum, and Mint. They also seem less attracted to furry leaves such as those of Stachys byzantina.

Can I use nematodes in pots?

You apply the nematodes to pots and open ground from March to November. ... Simply water the Nemasys Vine Weevil Killer nematode solution directly to the soil around the roots, which is where the larvae will be feeding. To keep a minor problem at bay, one treatment should be adequate.

Can I apply nematodes in November?

Nematodes are recommended for use whenever larvae or grubs are present. Generally, this is during spring and autumn. Because larvae feed on plant roots, beneath the soil surface, severe damage can be done before realizing there is a problem.

Can you drown vine weevil grubs?

The advice seems to be to submerge the plant (not the top growth) in water for 48 hours. This is not long enough to damage the plant significantly but apparently it does drown the vine weevils.

What plants do vine weevil grubs eat?

Vine weevils are especially fond of camellias, euonymus and rhododendrons, though they will also feed on other shrubs and tough herbaceous plants like bergenias. The grubs feed on the roots of a wide range of plants, both indoors and out.

Do vine weevil grubs eat bulbs?

You know if you have vine weevil because healthy plants decline, leaves droop and turn red under stress, and new growth no longer appears in spring. Deep below the surface, white grubs are eating the young roots, boring into tubers of cyclamen and begonias, eating the woody parts of mature specimens.

How do you spot a vine weevil?

Symptoms

1. Adult weevils are approximately 9mm (about 5/16in) long and dull black with dirty yellow mark on the wing cases. They cause irregular-shaped notches of leaf margins during the summer.
2. The plump c-shaped white legless grubs have light brown heads and are up to 10mm (about 3/8in) long.

Can you see vine weevil eggs?

If you spot golden-brown or clear egg-like objects in the soil or compost then they're NOT vine weevil eggs. Vine weevil eggs are brown and tiny and you'd need a hand lens to see them.

Do vine weevil beetles fly?

The wing covers are grooved and fused with the body. Therefore, vine weevils cannot fly but can walk very well. They are strictly nocturnal; during the day they hide, and can often be found between the inside of a plant pot and its contents, under lumps of e, in vegetation and under planks etc.

Does potting soil have nematodes?

Nematodes are unsegmented roundworms that commonly live in soil and invade plants. ... Plant-parasitic nematodes affect garden beds more than houseplants, but it's easy to carry nematodes in on your clothing or if you use garden soil as potting soil.

How do you get rid of weevils on rhododendrons?

Take burlap and make folds in it as you place it at the base of the plant. The weevils will hide in the burlap or paper during the day and can thus be trapped. Before the weevils move into the plants in the evening, the traps can be removed and the weevils destroyed. CHEMICAL CONTROL.

How do you use bug clear vine weevil killer?

How to use

1. Shake the bottle well.
2. Use the measure provided to mix 60ml of BugClear Ultra Vine Weevil Killer with 1 litre of water in a watering can or mixing vessel.
3. Pour the solution over the compost at the recommended rate. A litre of solution treats 10 litres of compost.

Are weevils harmful to plants?

If root weevils are present in your garden or houseplants, there will be damage to both the roots and the leaves. The leaves of the plant will be irregular, as though someone has been taking bites out of the edges. This damage will appear in the night, as root weevils come out to feed at night.

What does a vine weevil grub look like?

What do vine weevil look like? Vine weevil larvae are creamy-white with brown heads, 'C' shaped, and up to 10mm long. Adult beetles grow up to 9mm long, are dull black in colour, and are mainly active at night. Their eggs are round and measure less than 1mm, so are hard to spot in soil.

What is the life cycle of weevils?

Larvae mature in 18 days, and the pupa in 6 days. The life cycle is about 30 to 40 days during the summer, and 123 to 148 days during the winter, depending on temperature. Adults live 7 to 8 months. Female rice weevils lay between 300 to 400 eggs, with the life cycle requiring about 32 days for completion.

Are there male vine weevils?

LIFE CYCLE OF THE VINE WEEVIL

Note that there are no male vine weevils, all are female.

What do vine weevil eggs look like UK?

Eggs start off white, but turn brown before they hatch, making them very difficult to spot in soil. It's highly unlikely you'll be able to see the vine weevil eggs in compost or soil as they're so tiny - less than 1mm. If you see clear eggs, these aren't weevil, but slugs or snails.