Rice thrips are tiny pests that can cause significant damage to rice crops. Adults are dark brown, winged, and move quickly. The life cycle includes three stages: egg, nymph, and adult. Nymphs and adults are similar in appearance, being light yellow and wingless, often found at the tips of rice leaves. They feed by sucking sap from the leaves, causing them to lose moisture, curl, and turn yellow. White spots may appear on the leaves, and the plant's heart may shrink, giving the field a burned or fire-like appearance. During the flowering stage, thrips gather in the flowers, which can prevent grain formation, leading to empty grains.
Due to their small size, rice thrips often go unnoticed until serious damage occurs. Early detection is crucial, especially during the nymph stage. 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, it’s important to apply quick-acting fertilizers to help the seedlings recover and promote tillering.
Brown planthoppers and white-backed planthoppers are among the most destructive pests in rice fields. These insects typically hide in the leaf sheaths and stems of rice plants, feeding on the sap. This causes irregular brown spots on the leaves, and in severe cases, the base of the plant turns dark brown. As the stem tissue is damaged, nutrients cannot be transported upward, leading to wilting, lodging, or even plant death. After heading, the planthoppers move to the upper parts of the plant, resulting in empty grains or poorly filled kernels. Additionally, they can transmit viral diseases such as rice grassy stunt.
Control methods include using oil-based insecticides. Apply 400–500 grams of waste diesel or engine oil per acre, with a shallow water layer of about 20 cm. The oil suffocates the pests, and after treatment, replace the water. Another method is applying poisoned soil: mix 1.5 kg of Dimethoate powder with 2 kg of wet fine soil per acre. 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, can cause major yield losses, though they occur less frequently. The adult moths are reddish-brown, while the larvae feed on rice leaves, cutting them and leaving only the veins. In severe cases, the stems become hollow, resembling brush pots. When attacked during the booting stage, larvae spin silk to roll the leaves together, forming a curled ear that prevents proper grain development.
To control rice borers, use 2.5% Trichlorfon powder mixed with fine soil or combine 1 kg of A6 powder with 1 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 Japonica rice leafroller is another pest that damages rice by rolling the leaves into tubular shapes. The larvae feed on the surface of the leaves and later move to the tender leaf sheaths. In severe infestations, only the transparent epidermis remains, and the entire leaf dies.
For control, apply 25% Trichlorfon Emulsion diluted 250 times, or spray 90% Trichlorfon at 1000–1500 times. It’s best to treat before the third instar stage and in the evening for maximum effectiveness. After treatment, check the field again. If the larval density remains high, repeat the application. Regular monitoring and timely intervention are key to successful pest management.
Motor Home Parts
This classification mainly includes the aluminum alloy die casting Motor parts using in Auto area,the raw material is aluminum alloy.
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, Cold Chamber
Product Dimensions: Customized
Casting General Tolerance: Grade GB-CT4
Flow Processes: Die casting, Degating to remove the residual of the gate, 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: Auto Parts
Certificate: IATF16949:2016,ISO14001:2015,ISO45001:2018
Lead Time: 30-35 days
Trade Term: FOB Ningbo
auto die casting,aluminum die casting,aluminum alloy die casting,Malaysia Casting Motor Parts
NINGBO ZHENHAI BOLANG METAL PRODUCTS FACTORY , https://www.casting-part.com