Marcus Chen
Painted lady caterpillars have a varied diet, eating the leaves of several host plants. The nutritional content of these plants is essential for their growth and metamorphosis into adult butterflies. They particularly enjoy the leaves of thistles, mallows, and legumes such as alfalfa and clover. These plants provide ample nutrition for painted lady caterpillars, making them an ideal food source.
| Characteristics | Values |
|---|---|
| Butterfly Species | Painted Lady (Vanessa cardui) |
| Caterpillar Food | Leaves of host plants |
| Host Plants | Thistles, mallows, legumes, asters, blazing star, ironweed, Joe Pye weed, alfalfa, clover, butterfly bush, heliotrope, anise hyssop, marigolds, scabiosa, sedums, sweet William, Verbena bonariensis |
| Host Plant Families | Asteraceae, Malvaceae, Fabaceae, Compositae, Boraginaceae |
| Caterpillar Behaviour | Feed voraciously on host plant leaves for 5-10 days, growing through multiple instars |
| Adult Butterfly Food | Nectar-rich flowers |
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What You'll Learn
Thistles
Painted lady caterpillars, also known as thistle caterpillars, have a wide range of host plants, including thistles. They feed voraciously on the leaves of these plants, which provide essential nutrients for their growth and development. The nutritional content of thistles is crucial in helping the caterpillars metamorphose into adult painted lady butterflies.
Female painted lady butterflies carefully select host plants, including thistles, on which to lay their eggs. The lush foliage of thistles provides a nutritious feast for the caterpillars and contributes to their robust development. Thistles are also favoured by painted lady caterpillars because they offer ample nutrition and provide shelter and camouflage, protecting them from predators.
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Mallows
The Painted Lady butterfly (Vanessa cardui) is the most widespread butterfly species in the world, found on every continent except South America and Antarctica. These butterflies have a preference for laying their eggs on plants belonging to the Asteraceae family, such as thistles, which are characterised by their prickly stems and purple flower heads. However, another favoured host plant family is Malvaceae, with mallows being particularly favoured.
Female Painted Lady butterflies carefully select host plants on which to lay their eggs, typically preferring species such as thistles and mallows. Upon hatching, the caterpillars feed voraciously on the leaves of these host plants, rapidly growing and developing through multiple instars. The nutritional content of the host plants is essential for the caterpillars' growth and metamorphosis into adult butterflies.
In addition to thistles and mallows, various legume species within the Fabaceae family, such as alfalfa (Medicago sativa) and clover (Trifolium), are also favoured by Painted Lady caterpillars. These legumes offer vital nutrients that are essential for the caterpillars' growth and development.
Painted Lady butterflies exhibit a preference for nectar-rich flowers, which serve as their primary food source during adulthood. They are drawn to species within the Asteraceae family, such as asters (Aster), which have a daisy-like appearance and come in various colours, providing abundant nectar for the butterflies. Other nectar plants that attract Painted Ladies include butterfly bush (Buddleia), heliotrope, anise hyssop, marigolds, scabiosa, sedums, sweet William, and Verbena bonariensis.
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Alfalfa and clover
Painted lady caterpillars have a varied diet, with more than 100 plant species recorded as their host plants. They primarily feed on weedy hosts such as Malva (cheeseweed), plantago, cocklebur, and star thistle. They also enjoy legumes, especially lupines, but not alfalfa or its close relatives.
Alfalfa, or Medicago sativa, is not a host plant for painted lady caterpillars. However, these caterpillars will spill over from feeding on weeds and gather alfalfa leaves. They use these leaves to form silken tents, similar to cocoons, where they pupate and emerge as adults. While they may use alfalfa leaves for shelter, painted lady caterpillars do not feed on or breed on alfalfa or tree crops. Therefore, while you may find painted lady caterpillars in alfalfa fields, they will not cause any economic damage to these crops.
Clover, or Trifolium, is a legume that is favoured by painted lady caterpillars. Like other legumes, clover provides vital nutrients that are essential for the caterpillars' growth and development. Clover is also characterised by its nitrogen-fixing abilities and compound leaves with small, clustered flowers.
Painted lady caterpillars exhibit a preference for legumes that belong to the Fabaceae family, which includes both alfalfa and clover. These plants offer abundant nectar reserves within their flowers, making them enticing feeding spots for painted lady butterflies.
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Asters
Painted lady caterpillars are voracious eaters, consuming large quantities of foliage before pupating. They feed on a range of host plants, favouring thistles, mallows, hollyhocks, legumes, and, of course, asters.
In addition to asters, Painted Lady caterpillars also consume the leaves of other plants in the Asteraceae family, such as thistles. Thistles are characterised by their prickly stems and distinctive purple flower heads. They provide ample nutrition for Painted Lady caterpillars, making them ideal host plants.
By planting asters and other host plants, gardeners can attract Painted Lady butterflies and provide food for their caterpillars. This helps support the lifecycle of these beautiful insects and contributes to their remarkable migratory behaviour.
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Ironweed
Painted lady caterpillars eat the leaves of a wide variety of host plants, with a preference for plants in the Asteraceae family, such as thistles, asters, and ironweed. Thistles, with their prickly stems and purple flower heads, provide ample nutrition for painted lady caterpillars, making them an ideal food source. Other favoured host plants include mallows, which are recognised for their soft, lobed leaves and nutritious foliage that supports caterpillar development.
In addition to thistles and mallows, painted lady caterpillars also feed on legumes within the Fabaceae family, such as alfalfa and clover. These legumes provide essential nutrients that are crucial for the growth and development of the caterpillars.
Painted lady butterflies (Vanessa cardui) are known to have a broad range of plant preferences, and they carefully select host plants on which to lay their eggs. Female butterflies are drawn to plants with lush foliage, which can support the healthy development of their caterpillars.
Overall, painted lady caterpillars have a diverse appetite and can feed on a variety of host plants, each offering essential nutrients for their growth and development. However, thistles, mallows, legumes, and ironweed are among their preferred choices.
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Frequently asked questions
Painted lady caterpillars eat the leaves of host plants, particularly thistles, mallows, and legumes.
Alfalfa (Medicago sativa) and clover (Trifolium).
Yes, there are over 100 species of host plants that painted lady caterpillars eat. Some other examples include calendula, hollyhock, sunflower, and Canada thistle.
