In areas where leaf miners abound, covering plantings with insect netting or floating row covers stops the insects from laying eggs on your plants
Dear Helen: I have been gardening for many years, but over the past five growing seasons my leafy vegetables, such as chard, spinach and beet leaves, have been damaged by leaf miners. I try to remove the ruined leaves when I see them, but more always appear. Is there a way to successfully control this insect pest?Picking off individual leaves and destroying them works as a control only where leaf miner populations are light.
Plantings can develop in unmarred condition for years before insect pests discover and infest them. I grew bulb onions with success without any protective measures for 25 years before a season came when onion flies discovered the planting and their larvae ruined every bulb. For a few years I had significant infestations of fungus gnats in the flats of transplants I grow under plant lights. The infestations disappeared when I changed the purchased soil component of my seeding and transplanting mix.
Little flies in kitchens, around fruit and kitchen compost containers, are fruit flies. They arrive indoors on purchased or harvested produce. The flies are most troublesome in late summer and early autumn, when they are attracted to ripe and rotting food.
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