Nigel Cattlin / Various annual broad-leaved weed seeds collected at harvest and contaminating barley cereal grain

Nigel Cattlin / Various annual broad-leaved weed seeds collected at harvest and contaminating barley cereal grain

Nigel Cattlin / Wheat (Triticum aestivum) grains, a comparison of a good quality harvest with poorer harvest, grain with chaff and husk contamination, and crushed and broken grains.

Nigel Cattlin / Wheat (Triticum aestivum) grain with husk and chaff contamination, quality control of grain sample prior to storage.

Nigel Cattlin / Barley (Hordeum vulgare) grain, cross sections of seeds treated with tetrazolium salt which stains viable living tissue red, a test for germination.

Nigel Cattlin / Barley (Hordeum vulgare) germination test, seed treated with tetrazolium salt. Grains stained red are viable, colourless grains are not viable.

Nigel Cattlin / Cleavers (Galium aparine) seeds contaminating combine harvested Wheat (Triticum aestivum) grain, grain rejected in quality control.

Nigel Cattlin / Cleavers (Galium aparine) seeds contaminating combine harvested Wheat (Triticum aestivum) grain, grain rejected in quality control.

Nigel Cattlin / Shore fly or fungus fly (Scatella stagnalis) adult on glasshouse mesh. Shore flies contaminate lettuce crops

Nigel Cattlin / Shore fly or fungus fly (Scatella stagnalis) pupa on glasshouse mesh. Shore flies contaminate lettuce crops

Nigel Cattlin / Woman testing cereal seed for viability, germination level and seedling vigour in a quality control laboratory at a agricultural grain merchant