In recent years, due to the hazards of walnut limb moth, anthracnose, black spot, etc., the problem of black walnut has increased, which has seriously affected the yield and quality of walnut. From June to July, during the peak period of these three kinds of insects and diseases, fruit farmers should seize the time and take effective measures to prevent and control them. Piston rings are manufactured and classified on the basis of function and usability. The primary usage of the Piston Ring is to seal the chamber (where the piston is moving), which can be a combustion chamber of a 2 stroke or a 4 stroke engine. Marine engines have three or more types of rings fitted on the circumference of the piston.
In 2-stroke large engines, compression type piston rings are used to seal the combustion chamber and wiper rings are installed below them to wipe the deposits from the liner and distribute oil on the liner surface.
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Walnut limb moth control measures: walnut limbs are commonly known as walnut black, adults occur in June-July, larvae are the most serious damage in July. The insect resistance is weak, and the pollution-free pesticide 10% cyhalothrin 1500-2000 times liquid and 15% imidacloprid 3000 times liquid can be selected, and the control is started at the end of June. After 7-10 days, you can spray again, the effect is better.
Prevention and treatment methods of anthracnose and black spot disease: Both of these diseases can cause fruit rot, which is a relatively serious disease in walnut production. Moreover, both diseases are peaked in the rainy season from July to August. Before the arrival of the rainy season, choose 50% carbendazim 800-1000 times liquid, 50% methyl thiophanate 500-800 times liquid for prevention and treatment.
The piston ring is an essential piston part, and its numbers and functionality differ depending on the type and capacity of the engine.
