Scientific name Helicoverpa armigera (Hubner) Synonyms Heliothis armigera Hubner Lepidoptera, Noctuidae. Alias â€‹â€‹cotton bollworm. Widely distributed throughout the country.
Host peanuts, cotton, wheat, beans, tobacco and other crops.
The traits of larvae damage the leaves and buds of peanuts into nicks, especially eating buds, affect fertilization and fruit needles into the soil, resulting in a significant reduction in production.
Morphological characteristics can be found in cotton pests, cotton bollworms.
Habitats in North China Peanut District 4 generations, the Yangtze River Valley 5-6 generations, South China 6-7 generations. The first generation of Shandong occurred in the first half of May in early June, and mainly damaged wheat, peas, and tomatoes. The second generation occurred in the middle of June and early July. It mainly damaged spring peanuts and was the main damage generation.
Prevention methods (1) Use five-point sampling method during the egg's flourishing period, check 20 to 25 peanuts per point, and when the pest rate reaches 5 to 10%, spray 10.8% Caesar EC every 667m2 4-6ml immediately. Or 40% acephate, 50% methyl parathion
667m2 80 to 120ml, can also be used 20% methomyl or mixture SN909 or 45% Propion EC 1000 to 1500 times the water, 667m2 spray good liquid 50L. (2) The practice of deep plowing in winter in peanut farms will destroy overwintering. (3) Inducing insects with poplar branches at the height of adult emergence.
It is used to create an image of internal body structures such as tendons, muscles, joints, blood vessels, and internal organs. Its aim is often to find a source of a disease or to exclude pathology. The practice of examining pregnant women using ultrasound is called obstetric ultrasound, and was an early development and application of clinical ultrasonography.
Ultrasound are sound waves with frequencies which are higher than those audible to humans (>20,000 Hz). Ultrasonic images, also known as sonograms, are made by sending pulses of ultrasound into tissue using a probe. The ultrasound pulses echo off tissues with different reflection properties and are recorded and displayed as an image.
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