citrus nematode

The citrus nematode, scientifically known as Tylenchulus semipenetrans, is a microscopic roundworm that infests the roots of citrus trees. This infestation leads to malnutrition and stunted growth in the affected trees. Citrus nematodes are found wherever citrus is grown and can significantly reduce fruit quality and production. Symptoms of infestation include a slow decline, yellowing leaves, and dieback of twigs and branches, particularly in older groves.12

Nematodes are a classification of plant disease causal agents. Control measures for nematodes include crop rotation with non-host plants, planting resistant varieties, using certified nematode-free nursery stock, and applying soil fumigants. Cultural practices that promote vigorous plant growth, such as proper watering and fertilization, can also be beneficial. Some plants, like marigolds, release chemicals toxic to nematodes.234