thrip are small , svelte insects with fringed wing that feed by puncturing plants and consuming cell sap . They belong to the order Thysanoptera . The Western efflorescence thrips ( Frankliniella occidentalis ) is the most commonly notice species in greenhouse rose plants and summertime peak .
The westerly flower thrips , scientifically cognize as Frankliniella occidentalis , primarily affects herbaceous ornamentals , include rose plants . These pests cause pregnant terms by stipple and scar petals , leaves , and other plant parts . fully grown thrips look with a brownish to black body and have thick bristle - similar hairs at the tip of the abdomen , with the abdomen extending beyond the wing tips when at residuum . The larvae are characterized by their yellow to orange bodies .
life story bicycle and damageThe animation cycle of thrips includes several stages : egg , two actively feeding larval degree , nymphal stages , non - feeding prepupal and pupal stages , and adult . Females lie diminutive eggs inside flower buds , which hatch into larvae that feed on the bud , stimulate damage . The larvae develop into pupae , which drop into the soil or folio litter . pupa then mature into adults , which deliver to the plant to feed in and lay eggs .
The life cycle of the Western flower thrips come along through several stages : egg , 1st instar , 2nd instar , propupa , pupa , and adult . Under optimum conditions , this perfect oscillation lasts about two workweek . The price triggered by thripid can be severe , with affected peak buds potentially becoming deformed and failing to open . Petals may exhibit chocolate-brown streaks and fatal spots , while young leaves can develop tiny scar and roll back . Severe infestations may ensue in scrubby works growth .
favourable conditionsThrips boom in hot , dusty , long-winded , and teetotal weather conditions . Poor sanitation , such as the comportment of juiceless fallen foliage , smoke , open blossom , and infested efflorescence buds , can exacerbate the problem . widow’s weeds and flowering shrub or Sir Herbert Beerbohm Tree around greenhouses can serve up as subaltern host plants .
direction and controlMonitoring :
Regular monitoring is substantive to find any entry of grownup thripid from outside . This can be achieved by using sticky traps and a well - organized exploratory survey system . The detection of even a single grownup should prompt immediate chemical interference before egg - laying occurs .
Cultural practices for managing Western flower thripid include removing fallen plant junk and parting where pupation occurs and eliminating open flower buds that might attract adults . It ’s also important to remove weeds that act as alternate hosts . In cases of modest infestations , infested buds should be removed to rule out eggs , larvae , and adult . affect plant parts should be disposed of in designated areas to prevent cross - contamination . Additionally , knocking buds in the morning and cut halt in the evening are recommended , along with shower plants to lower temperatures .
Chemical controlChemical control condition should be apply at the first sign of legal injury or during favorable conditions conditions . Careful excerption and mixing of chemicals are essential . Controlled showering before chemic program program can raise effectiveness , similar to other link insecticides . For labored infestation , applying chemicals to the stain or tuff is recommend to target the pupal stage , ensuring the media is well - moistened for effective chemic incursion .
Source : Greenlife
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