Rice seedlings
Branchiura sowerbyi, commonly known as red sand insects or drum mud insects, is a species of annelid worm belonging to the class Oligochaeta. It is widely distributed across the country and typically inhabits rice paddies and other aquatic vegetable fields. This pest primarily feeds on organic matter in the soil, but its activity can indirectly damage crops. Although it does not directly feed on rice seedlings, the movement of its body through the soil often results in seeds being buried too deep to germinate or causing young plants to fall over, leading to poor stand establishment and reduced yield. Adults measure between 50 to 80 mm in length, with a reddish-brown coloration. They have more than 120 segments, and along the midline of their back, they possess fine, thread-like tubercles. The front part of the body burrows into the soil, while the rear portion extends slightly above the surface. When disturbed, they move in a wave-like motion and quickly retreat underground. These worms thrive in low-lying, moist, and humus-rich soils. They often live in groups, with populations reaching up to 100 individuals in a single area. Their activity begins when the surface temperature rises to around 10°C in early spring, and they become most active at 20°C. High humidity, especially when the surface temperature is warmer than the deeper soil, encourages them to emerge and reproduce. Some of their bristles may be visible above the soil, swaying gently as they move. In a 24-hour period, they can expel up to 20–30 times their body weight in waste material, which can lead to significant damage to young plants if left unchecked. To manage infestations, several control methods are recommended. One approach is to rinse the roots of seedlings with a 0.1% tea dry solution—using 5–10 kg of tea dry per 667 m² mixed with 250–300 kg of water. Another option is to apply a 150-fold dilution of spray-thaw and puppet worm wettable powder to prevent infestation. For chemical control, 50 ml of 50% phoxim or 508 ml of 90% trichlorfon per 667 m² can be diluted with a small amount of water and mixed with 30 kg of fine sand before being applied with 60 kg of water. In areas where these pests are particularly problematic, applying well-composted organic fertilizer and implementing agricultural practices such as intermittent irrigation or crop rotation can help reduce their impact. Disposable Electroencephalogram Monitoring Sensor Disposable Electroencephalogram Monitoring Sensor,Anesthesia Depth Sensor,Eeg Equipment,Eeg Disposable Sensor JIANGSU JIANLAIBANG MEDICAL EOUIPMENT CO.,LTD , https://www.jsjlbmed.com