Rice thrips are tiny pests that can cause significant damage to rice crops if not managed properly. Adults are dark brown, winged, and move quickly through the rice field. The life cycle includes three stages: egg, nymph, and adult. Nymphs and adults are similar in appearance, being small and light yellow, without wings. They tend to gather on the tips of rice leaves, feeding on the plant's sap. This feeding causes the leaves to lose water, curl, and turn yellow, with white spots appearing on the surface. In severe cases, the heart of the plant shrinks, and from a distance, the affected area may look as though it's on fire. During the flowering stage, thrips congregate in the rice flowers, which can prevent pollination and result in empty grains.
Prevention and control should begin early, as these pests are often overlooked until damage becomes visible. Inspecting fields regularly and eliminating thrips in their larval stage is crucial. A recommended treatment is to apply 40% Dimethoate Emulsion diluted at 1500–2000 times per acre. After application, maintain a shallow water layer for a few days. Once the infestation is under control, applying quick-acting fertilizers helps promote healthy growth of seedlings and tillers.
Brown planthoppers and white-backed planthoppers are among the most destructive pests of rice. These insects typically hide in the leaf sheaths and stem tissues of rice plants, especially in the middle of the paddy field. As they feed, they cause irregular brown spots on the stems and, in severe cases, the base of the plant turns dark brown. Damage to the stem tissue disrupts nutrient flow, leading to wilting, lodging, or even death of the plant. After heading, planthoppers move to the upper parts of the plant, causing the grains to become empty or shriveled. Additionally, some species can transmit viral diseases that further harm the crop.
Control methods include oil-based insecticides. For example, 400–500 grams of waste diesel or engine oil can be applied per acre, with a shallow water layer of about 20 cm. The oil suffocates the pests, and after treatment, clean water should be reintroduced. Another method involves poisoned soil: mix 1.5 kg of Dimethoate powder with 2 kg of fine soil and spread it over the field. Spraying with 40% Dimethoate at a rate of 0.5 kg per 800–1000 kg of water is also effective.
Rice borers, also known as leaf-curling insects, are another major threat. These pests occur every few years and can drastically reduce rice yields. The adult moths are reddish-brown, while the larvae feed on the rice leaves, cutting them off and leaving only the veins in severe cases. The stems may resemble brush pots, and when attacked during the booting stage, the larvae spin silk to curl the leaves into protective shelters, preventing proper ear emergence and lowering yield.
To control rice borers, use 2.5% Trichlorfon powder mixed with 2 kg of fine soil and 10 kg of toxic soil. Alternatively, spray 90% Trichlorfon crystals diluted at 150 g per 80–100 kg of water.
The rice leafroller, specifically the Japonica rice leafroller, begins feeding inside the rice leaf sheath, rolling the leaves into tubular shapes. The larvae feed on the leaf surface and then move to tender leaf sheaths after heading. In severe infestations, only the transparent epidermis remains, and the leaves die. This significantly reduces the plant’s ability to photosynthesize.
For control, use 25% Trichlorfon emulsion diluted at 250 times or 90% Trichlorfon at 1000–1500 times. It is best to apply treatments before the third instar stage and preferably in the evening for optimal effectiveness. After treatment, monitor the field closely. If the pest density remains high, reapplication is necessary. Early detection and timely intervention are key to minimizing damage and ensuring a healthy rice harvest.
LED Flood Light
The classification mainly includes the aluminum or zinc alloy die casting Machinery Parts using in LED Flood Light area.
In the die casting process,higher specific pressure is required,so that higher filling speed can be obtained.which is beneficial for alloy to overcome mold filling resistance.and effectively fill each part of the cavity.The Casting General Tolerance is Grade GB-CT4.
Process Technology: High pressure die casting,Shot Blasting,NC Machining,Spray Coating
Product Dimensions: Customized
Casting General Tolerance: Grade GB-CT4
Flow Processes: Die casting,Degating,Polishing and Deburring to remove the burrs,Polishing to remove the parting line,flash,CNC Turning, Cleaning, Packaging, Storaging, Shipping
Control Measure: Incoming Material Test, First Article inspection,Routing inspection,Final item inspection, and Outgoing quality control
Inspection Equipment: CMM, Caliper,Plug Gage,Screw Gauge
Application: Lighting Parts
Certificate: IATF16949:2016,ISO14001:2015,ISO45001:2018
Lead Time: 30-35 days
Trade Term: FOB Ningbo
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