Pollen Sieve

Quick Answer: A pollen sieve is a fine-mesh sieve used to separate pollen grains from coarser material such as anther walls, petals, dust from hive pollen loads or plant debris in sediment. Botany, agriculture and apiculture classes use it to obtain a clean pollen sample for hand pollination, viability tests and microscope study.

How the Mesh Separates Grains from Debris

Pollen grains of most flowering plants are only a few tens of micrometres across, far smaller than the anther fragments, filaments and insect parts that come with them when pollen is shaken from flowers or taken from a hive. The sieve exploits that size gap: dry material is tapped or brushed across the mesh, the fine pollen falls through as a powder, and the coarse fraction stays on top to be discarded. The result is a sample clean enough to weigh, store, stain or brush onto a stigma.

The same principle serves three different groups of users. Plant breeders and horticulture students sieve pollen from dried anthers before making controlled crosses. Beekeeping courses use a sieve to clean the pellets collected by a hive pollen trap. In pollen analysis, sediment or peat samples are washed through a mesh to remove sand, roots and plant fragments before the fine fraction is treated and examined, the step that the Peat Pollen Extraction Kit builds on.

The listing names the item simply as a pollen sieve and does not give the mesh opening, the frame material or the diameter. Those three points decide which of the uses above it suits, so they are worth settling before ordering a class set.

Uses in Botany and Apiculture

• Collecting pollen from dried anthers for hand pollination and plant-breeding practicals
• Preparing clean pollen for germination tests, in which grains grow pollen tubes on a sucrose medium under the microscope
• Cleaning bee-collected pollen loads from a hive pollen trap in apiculture courses
• Removing coarse fragments from peat or lake-sediment samples during pollen analysis
• Making reference mounts of pollen from known plants for identification work

Specifications

Care of the Mesh

• Clean the pollen sieve with a soft, dry brush from the underside; pushing at the mesh with a pointed tool can open gaps that let debris through.
• If the mesh is washed, dry it completely before storage, because damp pollen residues support mould.
• Keep separate sieves for different plant species in breeding work, or clean thoroughly between samples, so stray grains do not end up in the wrong cross.
• Store the sieve flat and covered so the mesh is not dented or dusty.

Why Choose LabEquip

Sieves for pollen work are ordered by botany departments, agricultural colleges and beekeeping trainers who need clean pollen rather than whole flowers. LabEquip lists the sieve in its biology lab products range; share the intended use and quantity through the contact page so the mesh can be matched to your samples.

Frequently Asked Questions

What mesh size does a pollen sieve need?

Pollen of most flowering plants measures roughly 10 to 100 micrometres, so a mesh with openings somewhat larger than the grains lets pollen through while holding back anther fragments. Very large pollen, such as that of maize or pumpkin, needs a coarser mesh. The mesh of this sieve should be confirmed at enquiry.

How do I collect pollen for hand pollination?

Pick flowers just before the anthers open, remove the anthers and let them dry on paper at room temperature until they split. Tap or roll them gently over the sieve above a sheet of glossy paper or a clean dish, then transfer the collected pollen to the stigma with a fine brush.

How can I check whether sieved pollen is still viable?

Scatter a little pollen on a drop of dilute sucrose solution on a cavity slide or in a dish and keep it moist. After an hour or so, viable grains grow pollen tubes that can be counted under a microscope. Stains such as acetocarmine are also used to separate filled grains from empty ones.

Can the sieve clean bee-collected pollen?

Yes. Pollen traps on hives collect pellets mixed with dust, wax flakes and insect parts. On a fine mesh the pellets stay on top while dust and loose particles fall through, and larger debris such as wings can be picked off by hand. Clean pellets should then be dried or frozen promptly, because fresh bee pollen spoils quickly.

Is sieving pollen a problem for students with hay fever?

It can be, because pollen is a common allergen. Work away from fans and open windows, sieve over a tray to limit airborne dust, and let sensitive students wear a dust mask and gloves or take on the recording tasks instead.

How do I stop pollen from one plant contaminating the next sample?

Tap out all residue, brush both sides of the mesh and wipe the frame with 70 percent ethanol, letting it dry fully before the next species. In controlled crosses, many breeders simply keep one sieve per parent plant and label it.

Last Updated: September 2026