One, the main reason
1. Hummer, Swedish fly damage. Peeling the outer leaves revealed that the base of the leaf had shrunk and had holes. The main performance is the distortion of the heart and leaves of the corn, the leaves are damaged, shrunk, and rows of holes appear on the leaves. There is a transparent film on the front of the leaf, some of the heart has mucus, and some of the heart has been broken.
2. Post-emergence herbicide injury. Damage to leaves of fleas and swarms was more or less detrimental, and undisturbed twisted leaves were caused by the use of nicosulfuron-containing post-emergent herbicides.
Second, control methods
1. Immediately use scissors to cut out the upper 1/4 blade, or manually dismantle the twisted heart, and fertilize the water, and spray 1000 times the plant growth regulator “Tianfengsu†(brassica lactone). Or efficient foliar fertilizer "double effect king", 1 bag 40 ml water 30 ~ 45 kg, or 6000 times love to receive more +0.2% ~ 0.3% potassium dihydrogen phosphate +1% urea solution + zinc, boron micro Fertilizer, 5 to 7 days 1, even spray 2 times.
2. If it is caused by insect pests, it is mainly necessary to prevent and control the thrips and Swedish flies in the summer when 5 to 6 leaves of the corn are grown. In the period of large corn flares, spraying and preventing the disease are also required. Formula is: 10% imidacloprid 1000 times or 5% acetamiprid 1500 times plus agricultural streptomycin 500 ~ 800 times liquid, plus some efficient foliar fertilizer, spray 5 ~ 7 days, once even spray 2 Times.
3. Due to herbicide harm caused by distortion of the heart, it should pay attention to the use of high-quality post-emergence corn herbicides, and pay attention to avoid high-temperature time medication, the appropriate period of time to prevent drug use caused by drug damage too late.
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
Laparoscopy Drape,Surgical Laparoscopy Drape,Disposable Laparotomy Drape,Disposable Laparouscopy Surgical Drape
ShaoXing SurgeCare Medical Products Co., Ltd. , https://www.sxsurgecaremedical.com