You asked: What pests attack onions?

Thrips are the most common insect pest of onion, causing widespread damage. They are found wherever onions are grown in California. Thrips are present every year, but infestations vary widely depending on weather conditions.

What pest eats onions?

There are several important pests that attack onions and garlic, like nematodes, stem and bulb eelworm, thirps and onion fly or maggot. Onions are also very prone to foliar diseases and bulb rots, such as slimy or ‘sour’ outer scales, a bacterial disease that significantly reduces onion bulb quality.

How do you protect onions from pests?

Crop containment e.g. Fleece barrier to stop flying adults, or grow in poly- tunnels. Avoid planting in soils that have un-rotted organic matter present. Plant sets instead of seeds and avoid planting in rows if possible to stop maggots moving from plant to plant. Avoid sowing at peak Onion Fly breeding times.

What is attacking my onions?


Often simply called Leek Rust, it affects onions, leeks, garlic and chives. Rust is a fungal disease which attacks the allium family of plants the worst affected being leeks, onions and chives but onions are also sometimes affected.

What is the problem with onions?

More than 1,000 people in the U.S. have been sickened with salmonella, and 136 people have been hospitalized, probably because of eating onions contaminated with the bacteria, the Centers for Disease Control and Prevention says.

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Whats eating my onion roots?

Description: Onion flies (the parents of onion root maggots) are small hump-backed flies that emerge in late spring, just as onions begin to grow vigorously. They lay eggs at the base of onion plants, and the larvae tunnel into onion roots.

What causes onion fly?

Biology. Adult onion flies emerge from overwintered pupae from May onwards and deposit eggs at the neck on young leaves or in the soil adjacent to host plants. … The next generation of flies emerges after two to three weeks and there can be three generations a year.

Do onions have pests?

Onions don’t have many pests because of their strong flavor, but onion thrips are a real problem. Thrips are little yellow bugs, only 2mm long, that attack crops in June and can produce several generations in a single summer. Because they hide in and under foliage, they can do a lot of damage before they’re noticed.

Will ants eat my onions?

Ants don’t like the smell of raw onions, if you don’t like ants in your kitchen and they insist on coming in anyway, leave out a bowl of raw onion slices to let them know they are not welcome. … Prepare a mixture of 10 drops of peppermint essential oil and a cup of water and sprinkle it wherever you find ants.

Which crop is infested by Pollu Beetle?

The pollu beetle is a serious in black pepper plantations in the plains and at lower altitudes. The adults feed on tender shoots, spikes and berries. The infested shoots and spikes turn black and drop. The grub on emergence bore into the berries, feed on the internal contents and make them hollow.

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