The Occurrence Trend of Corn Borer and Suggestions for Prevention and Control
In recent years, locusts have risen from secondary pests to major pests in our county, especially in the past two years. They have been clustered in the heart and leaves prior to tasselling. After tasselling, they spread to tassels and ears. On the breeding damage. Corn borers can damage corn, wheat, sorghum, rice, and many grass crops. In the seedling stage, Chengyu and Ruocheng are harmed in the heart and leaves. After heading, they damage the ear, absorb juice, hinder growth, and spread a variety of viruses. According to the monitoring and investigation of corn borers at the county plant protection and phytosanitary stations from April 20 to June 27 in Cuihua, Yuele, Tianxing, Shanggaoqiao, Muzhi, and Geely, it was found that corn borers began to be damaged in mid-June. . The recent increase in rainfall, high temperatures, high humidity in the field, and rapid spread are conducive to a large number of corn borer damage. Therefore, prevention and control efforts have been strengthened to ensure that the county’s grain production will increase. First, the characteristics of corn borer damage Before tasselling, corn has been clustered in the heart and leaves. After tasseling, it spreads to tassels and propagates on the ear. The flowering period is the most favorable period for the reproduction of corn tadpoles. Therefore, the appropriate period of control should be before tasseling. As the corn tassels are gradually withdrawn, a large number of them are concentrated in the tassels, and some have a few hundred to several thousand heads. The amount of pods is often piled up and covered with various branches, called "black. "Sui", when serious, from all the leaves above the ear, leaf sheath and ear pods inside and outside, all over the aphids. Second, the occurrence of corn worms In our county, there are 10 to 20 generations a year, and it is common to fly over the winter in the heart of wheat seedlings and grass weeds. At the end of April and early May, it migrated to spring corn and sorghum. Before tasselling, corn has been clustered in the heart and leaves. After tasseling, it spreads to the tassels and propagates on the ear. The flowering stage is the most favorable period for the breeding of corn taro. Therefore, the appropriate period of control should be before the tasseling. The optimum temperature and high humidity, that is, the average temperature of about 23°C in a ten-day period and the relative humidity of more than 85%, are suitable for the breeding of corn borers when the corn is at a positive stage of flowering. Third, the forecast of the occurrence trend of corn borers Due to the recent increase in rainfall, high temperatures, high humidity in the field, and the use of corn borer damage, corn is now in the jointing stage. During this time, the ability of corn to resist pests and diseases is weak, and in July, August and September, it is high temperature and humidity. It is beneficial for the occurrence of corn borers. The occurrence of corn worms is moderately heavy. It is expected that there will be four grades and an area of ​​about 80,000 mu. This will cause damage in all towns and towns in the county. Fourth, control advice (1) Timely eradication of weeds in the field and elimination of the breeding base of corn borers. (II) When the rate of pods in the leaf stage of corn is up to 5%, and when the amount of pupa is over 2,000, the use of 10% imidacloprid wettable powder 2000 to 3000 times, or 2.5% killing the liquid 3000 times evenly , can also be used to double the liquid filling heart. Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone 7 Inch Biometric Tablet,7'' Android Biometrics Fingerprint Tablet,7-Inch Rugged Industrial Tablet,7'' Android Fingerprint Rfid Tablet Chongqing Huifan Technology Co., Ltd , https://www.huifantech.com