Cleavers

Commonly called bedstraw, Cleavers (Galium aparine) is a common annual weed found in crops, gardens, hedgerows and waste places throughout New Zealand. With its scrambling growth habit, cleavers can compete and smother slow growing crops like fodder beet. With its inherent stickiness the leaves, stems and seeds can cling to human clothing.
Cotyledons:
- Apex notched
- Base rounded
- Short-stalked
Leaves:
- Lanceolate, broad in front, tapered at the base
- Whorled
Germinating in the autumn through to the spring, cleavers can growth up to a metre in fertile soils. With hooks on the stems, it can scramble over and up crops and can be commonly seen climbing up hedgerows.
The leaves grow in distinctive whorls on weak stems that are easily broken. The seeds are round and initially green changing to a purplish colour. They have bristles which readily stick to animal fur and human clothing.

Cleavers seedling

Cleavers seedling

Cleavers growing fast

Cleavers mature
Related Pests

Barnyard Grass
Echinochloa-crus-galli

Annual Poa
Poa annua

Cornbind
Fallopia convolvulus

Fathen
Chenopodium album

Fumitory
Fumaria muralis

Nettle
Urtica urens

Shepherds Purse
Capsella bursa-pastoris

Sow Thistle
Sonchus oleraceus

Spurrey
Spergula arvensis

Wild Oats
Avena fatua
Depending upon the crop controlling 5-10 wild oats per square meter will result in an economic response. Wild oats also produce a large number of long-lived seeds, often as many as 150 per panicle with many panicles per plant. Wild oat seeds can remain viable in the soil for several years and the common saying “one year’s seeding, 7 years weeding” stands very true for wild oats. Wild oats can be successfully controlled with selective herbicides such as Puma S. However, if numbers are low hand rogueing should be undertaken if possible.

Wild Portulaca
Portulaca oleracea

Black Nightshade
Solanum nigrum

Groundsel
Senecio vulgaris

Twin Cress
Coronopus didymus

Willow Herb
Epilobium nummulariifolium

Willow Weed
Persicaria maculosa

Henbit
Lamium amplexicaule

Plantain
Plantago lanceolata, Plantago major

Scentless Chamomile
Matricaria perforata
Scentless Chamomile (Matricaria perforata) is a bushy annual or biennial plant that grows to 60 cm and is wholly or almost scentless. It has an erect stem, with branches only from mid stem upwards. The leaves are fern like and sticky. The flowers are large, with twelve white petals, with central yellow disc florets, giving the flower a daisy-like appearance. They appear singly on stems and branches between December and March.
Found in moist disturbed areas such as roadsides, cropland, pasture, drainage ditches and waste areas. The seeds are 2 mm, dark brown with a raise edge, and each plant produces 10,000 - 200,000 seeds which germinate in shallow soil.
Small Flowering Buttercup

Stinking Mayweed
Anthemis cotula

Storksbill
Erodium cicutarium
Storksbill (Erodium cicutarium) is an invasive, sticky, hairy plant which grows in rossetes up to 30 cm across. It is widespread throughout New Zealand in drier coastal and lowland areas, and found in pasture, grassland and arable land. The leaves are pinnate, resemble ferns, and are divided into pairs of leaflets. The flowers are a mauve-pink colour, have five undivided petals, and are arranged in loose clusters on reddish coloured hairy stalks. Flowering is September to May.
The seeds are contained in a long seed-pod which resembles the bill of a stork. When ripe the seed-pod bursts open into five strips, launching the seeds like little parachutes, or by means of the strips which have seeds attached to them, burying themselves into loose soil.

White Campion
Silene latifolia

Wild Radish - Charlock
Raphanus raphanistrum

Wild Turnip
Brassica rapa subsp. sylvestris

Speedwell
Veronica persica

Chickweed
Stellaria media

Wireweed
Polygonum aviculare
