Archive for the ‘INSECT LIFE CYCLE’ Category

Life cycle of Colorado Potato Beetle (Leptinotarsa-decemlineata)

 

lifecyle of colorado potato beetle Leptinotarsa-decemlineataHere is life cycle of colorado potato beetle (Leptinotarsa-decemlineata) picture with brave explanation.

Egg Stage. The insect overwinters in the adult stage a few inches beneath the soil surface. In the spring the one-half inch beetle emerges from the soil and searches for a suitable host. Once a suitable host has been located, the beetles feed, mate and lay their eggs on these plants. The yellowish-orange eggs (Figure No 1) are deposited on the undersides of leaves of host plants and nearby weeds. Each egg is about 1.8 mm long. Over a 4 – 5 week period, each female beetle lays eggs in batches of 20 – 35. A total of 400 – 600 eggs may be deposited by one female.

Larva Stage. Red at first, this soft grub has a black head and black legs. As it matures, the larva turns yellowish-red or orange and develops two rows of black spots along each side of the body. It reaches a length of about 10 mm. It feed for 2 – 3 weeks before crawling down the plant and onto the soil; they then construct a small chamber in the soil and pupate. (Figure No 2)

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Posted by on September 28th, 2010 68 Comments

Illustrated Picture of Lily Beetle (Lilioceris lilii) Life Cycle

picture of lily beetle (Lilioceris lilii) life cycle Here is illustrated picture of Lily Beetle (Lilioceris lilii) life cycle with brave explanation.

  1. Eggs Stage. The eggs of red Lily Beetle are lain in rows of about 2-15 eggs on underside of leaves. The size of these eggs are about 1.0 x 0.5 mm and orange in coloration with a sticky orange-red secretion, which help the eggs stick to leaves. This stage usually occur in late spring-summer.
  2. Larval Stage.  Red Lily Beetle larvae consist of four larval instars, developmental stages between each moult within larval stage.  Larva are deep orange. The stage last about 10-11 days.  This stage usually occur summer.
  3. Pupal Stage. After changing colour from yellow to orange, the pre-pupal larvae bury themselves in the soil and construct well camouflaged cocoon from which the beetle emerges as young adult after 20-22 days of pupation. This stage usually occur in summer-autumn.
  4. Adult Stage. The adult over winter in the litter, reemerging in the spring from their hibernation sites and feeds on lilies and fritillaria. This stage usually occur in winter-spring. 

Posted by on May 13th, 2010 5 Comments

Ladybug life-cycle, an Illustrated Picture

Ladybug life cycleThe life-cycle of ladybug has four stages: the egg stage, the larvae stage, the pupa stage, and the adult ladybug stage. Here is illustrated pictures of Ladybug life-cycle with brave explanation of each stage of life-cycle.

  1. The egg stage; In order to protect eggs from being seen by flying predators, ladybugs lay their eggs on the underside of leaves. Ladybug will lay from ten to fifteen eggs in one place. The eggs of ladybug is look like yellow jellybeans.
  2. The larvae stage; The larva of ladybug eat tiny mites or aphids. Newborn larvae look sort of like tiny alligators. In a few days the size of larvae will be larger and ready  to molt and they keep molting for as long as they are growing.
  3. The pupa stage; During the pupa stage, the larvae are going through a metamorphosis into a ladybug.
  4. The adult ladybug stage; The full grown ladybug will emerge when metamorphosis is complete. This newborn ladybug look soft and pink or very pale for a couple of hours until its shell becomes hard. As the shell hardens it also gains pigment.

Posted by on March 26th, 2010 1 Comment