onion thrips life cycle

Onion thrips Thrips tabaci develops in six stages. Onion thrips feed by puncturing the epidermis with a stout mandible puncturing deeper.

Onion Thrips

Thrips adults are capable of flight and are likely assisted for longer range dispersal by air currents.

. The average pre-oviposition oviposition and post-oviposition periods are 6 23 and 4 days respectively. Onion thrips are also vectors of plant viruses such as the tomato spotted wilt virus. Using its ovipositor the female lays 30-80 tiny white eggs turning a paler yellow as they mature into small cuts in the host plant tissue.

Thrips tabaci reproduce entirely parthenogenetically males are very rare. Shortest during of life cycle have been recorded during April about 14 days and longest in December about 23 days. Adult female lives for about two to four weeks and can lay 20-200eggs.

The duration of total life span egg to death of adult for male was 3750354 days while for female it was 4596424 days. The application of chemical insecticides is the common control measure. The life cycle consists of five stages.

Thrips on garden plants usually have two or three generations a year but may have more during hot summers. After passing through two larval instars a pupa is formed in the soil from which the adult emerges. The average adult life is around 32 days and pre-oviposition oviposition and post-oviposition periods are 61 225 and 39 days respectively.

Females can reproduce without mating and lay eggs on the undersides of leaves. Female adult western flower thrips live up to 30 days and lay 2-10 eggs per day. The entirely life cycle of onion thrips can be completed in about three or four weeks during the summer and multiple generations occur on onions.

The length of the life cycle varies and is affected by temperature. Key thrips population management strategies include 1 cultural practices to increase onion plant tolerance and reduce attractiveness to thrips 2 begin thrips suppression in the early summer before a reservoir of eggs builds up in plants and 3 use of long-term suppressive strategies that target all life stages of onion thrips Fig. Onion Thrips Life Cycle Adult Egg Larva 2 instars Prepupa Pupa Hatch in 4-10 days Lasts 7-14 days In soil for 5-7 days 17-30 days total.

High populations of thrips reduce. The eggs of the onion thrips Thrips tabaci are laid in leaves flower petals and in the soft parts of stalks. At 20C development from egg to adult takes approximately 19 days.

Onion thrips have six to ten generations depending on temperature. Females deposit eggs directly in the host tissue. The pre-oviposition oviposition and.

Once temperatures rise female thrips lay eggs on either the overwintering host if it remains a suitable food source or moves to an alternative host. The entire life cycle from egg to adult is about 11 days at 30C. Lifecycle of thrips Different stages in the life of a thrips.

In the UK onion thrips overwinter in the adult stage and prefer host vegetable crops such as leek. The duration of thrips life cycles is determined by temperature. Total lifespan from egg to death a single thrips may live up to two months 60 days if.

The legs end in a small bladder not claws. Egg two larval instars prepupa pupa and finally the adult insect. These latter stages almost always occur in the soil.

They are inserted into the plant tissue with a saw-like ovipositor. In Utah females reproduce asexually parthenogenesis and insert eggs individually into leaves. Life cycle and appearance of Onion thrips.

Lifespan of thrips insects. Eggs hatch after 5-10 days and nymphs are full grown within 15-30 days. Onion thrips Thrips tabaci develops in six stages.

Development of the last two nymphal stages occurs in the soil without feeding. Onion thrips is the dominant thrips species in onion fields. They overwinter as adults and become active in the spring dispersing into onion fields.

This video show the life cycle of onion thrips which has six life stages egg first and second nymph pre pupa pupa and adult with images. Onion thrips flights are more common in spring and autumn. Nymphal stages are similar to adults but do not have fully developed wings.

The eggs of the onion thrips Thrips tabaci are laid in leaves flower petals and in the soft parts of stalks. Egg larval prepupal pupal and adult. They are inserted into the plant tissue with a saw-like ovipositor.

Onion thrips Alton N. The average number of eggs laid by an unmated female is 374 20 to 200. Life cycle Onion thrips overwinter in legume and grain fields and along weedy field edges.

Male and female thrips lifespan. However they will also overwinter in other locations such as on winter cereals. Under ideal conditions the life cycle is completed in 24-35 days and thrips in glasshouses may continue breeding throughout the year.

Egg two larval instars prepupa pupa and finally the adult insect. Life cycle and appearance of Onion thrips. Females can reproduce without mating and lay eggs beneath the leafs surface.

At 15 C a life cycle from egg to adult may take 35-45 days whereas at 30 C a life cycle can be completed in 12-15 days. May Sep. Adult females have slender yellowish 125 inch-long bodies with hair-fringed wings held over their backs when at rest.

Adult thrips lay eggs in live plants for them to hatch and give rise to the. A single life cycle is completed within 11-35days and this is majorly dependent on temperature conditions. Onion thrips overwinter in legume and grain fields and along weedy field edges.

Thrips are not strong fliers but they move short distances a few metres from dying weeds to crop plants and over long distances tens or hundreds of kilometres when large numbers are caught in warm updrafts.

Onion Thrips Koppert Canada