CRYPTOLAEMUS MONTROUZIERI PDF

Cryptolaemus montrouzieri Mulsant, Adult mealybug ladybird, Cryptolaemus montrouzieri Coleoptera: Coccinellidae. It is mainly found in Auckland and Northland as it does not persist in places with cool winters. It occurs on plants infested with mealybugs and scale insects, especially those found on Bunya pine and Norfolk Island pine both Araucaria species. Conservation status: Mealybug ladybird is in warmer areas of New Zealand and not threatened.

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Cryptolaemus montrouzieri Mulsant, Adult mealybug ladybird, Cryptolaemus montrouzieri Coleoptera: Coccinellidae. It is mainly found in Auckland and Northland as it does not persist in places with cool winters. It occurs on plants infested with mealybugs and scale insects, especially those found on Bunya pine and Norfolk Island pine both Araucaria species.

Conservation status: Mealybug ladybird is in warmer areas of New Zealand and not threatened. It is a useful biological control agent of some kinds of mealybugs and some scale insects.

It also feeds on some native insects. Life Stages and Annual Cycle Adult mealybug ladybirds are black with a brown head, prothorax area behind the head and the end of the elytra wing covers. Under the elytra is a pair of wings used for flying.

The underside of the body is also black and brown, brown head, prothroax and abdomen. The small head has a pair of compound eyes and two short brown antennae.

Female ladybirds lay small groups of eggs among the cottony egg masses of mealybugs and by scale insects. A larva hatches from each egg. It is covered with white flocculent wax and looks like a woolly mealybug. The three pairs of legs are used for walking. The hind end of the larva is used to hold onto the plant surface as it is walking.

As the larva grows, it moults changes skin. There are four larval instars stages. When the fourth larval instar is fully grown, it attaches itself to a sheltered place on a plant and moults into a pupa. The pupa remains attached to the plant by its hind end and is surrounded by the moulted larval skin.

If disturbed, the pupa can wag up and down. Adults hatch from pupae and mate. Annual cycle The mealybug ladybirds appear to breed all year in New Zealand. There are probably at least three generations per year in Auckland. The length of time of each life stage depends on temperature, being shorter at higher temperatures. Females lay eggs per day, for a total of eggs in their day life time. Larvae feed on mealybugs for days.

Walking and flying Both adult and larval stages of the mealybug ladybirds have three pairs of legs that can be used for walking. The larva can also hold onto the plant surface with rear end of its abdomen, which acts like a sucker.

Adults have wings and can fly. Feeding The adult and larval mealybug ladybirds eat scale insects, especially mealybugs. The jaws are the primarily structures used for holding and chewing the prey.

Legs do not appear to be used for holding food. Adult mealybug ladybird, Cryptolaemus montrouzieri Coleoptera: Coccinellidae. The larvae look like mealybugs being covered in white flocculent wax.

They are very mobile and the head and legs can be seen on their underside. The underlying body colour is dark grey. Larvae of several smaller ladybirds also look like mealybugs and could be confused with those of the mealybug ladybird.

The underlying body colour of these larvae is orange-brown. Image: Nicholas A. Ladybird adults and larvae may be eaten by birds, spiders and predatory insects Honeydew Feeding In spring, adults are regularly in association with Pittosporum psyllid, Trioza vitreoradiata Maskell, Hemiptera: Triozidae. It is likely that they are feeding on the honeydew. It is particularly associated with the Australian golden mealybug, Nipaecoccus aurilanatus Maskell, , found on Bunya pine and Norfolk Island pine both Araucaria species.

The ladybird is reported to feed on aphids and each other. Scientific Name.

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Cryptolaemus montrouzieri

Coleoptera: Coccinellidae Mealybug Destroyer This beetle was imported into the United States in from Australia by one of the early biological control pioneers, Albert Koebele, to control citrus mealybug in California. Although C. Top: Mealybug destroyer adult and larva attacking citrus mealybugs. Photo: Jack Kelly Clark Appearance Cryptolaemus montrouzieri is a small about mm long , dark brown lady beetle with a tan to orange head and posterior. The larvae grow up to 1. Raupp Habitat Citrus groves in the coastal areas of California, interiorscapes, and greenhouses.

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