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The aphids may not be the original source of infection, but are instrumental in spreading the virus through the crop. [9] Various chemical treatments are available to kill the aphids and organic growers can use a solution of soft soap. [12] Wasp laying egg inside an aphid's body Aphids tended by ants
Aphidius wasps are endoparasitoids of aphids. The female wasp lays eggs in an aphid. When the eggs hatch, the wasp larvae feed on the inside of the aphid. As the larvae mature, the hosts die and become slightly enlarged or mummified, often becoming tan or yellow. Complete metamorphosis occurs within the host.
Hosts can kill endoparasitoids by sticking haemocytes to the egg or larva in a process called encapsulation. [21] In aphids, the presence of a particular species of γ-3 Pseudomonadota makes the aphid relatively immune to their parasitoid wasps by killing many of the eggs. As the parasitoid's survival depends on its ability to evade the host's ...
Ants protect these leaf-feeding aphids, primarily because they secrete a sugar-rich liquid called honeydew. Large populations of aphids can stunt shoots and turn leaves yellow. Apart from that ...
Aphids are repelled by strongly aromatic plants such as lavender, marigolds, garlic and mint. Plant these among your more vulnerable plants. Using trap plants is a different approach.
Learn what causes aphids and how to identify, kill, and control them naturally for healthy plants with no aphid holes. An aphid infestation can ruin a garden. Learn what causes aphids and how to ...
The eggs hatch as caterpillars which feed on the aphids. The ants do not defend the aphids from the caterpillars, since the caterpillars produce a pheromone which deceives the ants into treating them like ants, and carrying the caterpillars into their nest.
The eggs hatch in early spring and the first larvae are known as fundatrix (stem mothers) and feed at first on alfalfa. These aphids are all female and reproduce by parthenogenesis , producing nymphs which moult four times over the course of eight to twelve days.
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