Summer 2024CornIt may face seven major production reduction risks, that is, "seven mines". First of all, heat damage is highly likelyCornProduction has dropped significantly. The extreme low temperature in winter will cause high temperature and heat damage in 2024, so we should pay attention to the selection of varieties with better characteristicsAdaptabilityof the variety. For example, varieties with cylindrical spikes, wide grains and tight bracts, as well as varieties with a bulk density of more than 800, can have better growth performance under high temperature and heat damage conditions.
The second thunder is "wilt" or "yellow wilt" caused by rhizome rot. At present, there are few varieties with high resistance to stem rot, and varieties with higher resistance to multiple stem rot are even rarer. In addition, causedCornStem rotPathogensThere are many species, and the "withered white ears" caused by stem rot of wheat stubble are becoming more and more serious. Therefore, when selecting varieties, we should choose varieties with high resistance to stem rot as much as possible and pay attention to the selection of previous crops to avoid large-scale rhizome rot.
The third thunder is a stalk that is prone to lodging. When selecting varieties, we should pay attention to the characteristics of the "trinity", that is, varieties with well-developed root systems, good stem toughness and high resistance to multiple stem rots. In addition, with reference to the approved "double inverting rate", try to select no more than 1% of varieties to avoid yield loss caused by lodging.
The fourth thunder is a stalk that breaks easily. Although varieties with thick and hard stems are relatively resistant to lodging, they are easy to break when exposed to strong winds. Therefore, when selecting varieties, it is still necessary to pay attention to the characteristics of the "trinity" and refer to the "double inverted rate" to balance the lodging resistance and fracture resistance of the stem.
The fifth thunder is the wilt and mildew of the bracts. Whatever the reason for this is high feelingsAphids, large spot disease, round spot disease or anthrax stem rot all mean that the variety is defective. Therefore, when selecting varieties, we should try to avoid bracts and mildew.
The sixth thunder is drought and not drought resistance. IfCornPoor root systems are not only susceptible to disease attack, lodging and high temperatures, but can also lead to reduced yields. Due to the summerCornMost of the growing areas are in arid or semi-arid areas, and improving drought resistance is essential to ensure yields.
The last thunder is rust. Rust is a disease that can be prevented and controlled, as long as the above six aspects of performance are good, the requirements for rust do not need to be too strict. It should be noted that the so-called rust-resistant varieties or non-rust-resistant varieties are serious stem rot. Therefore, when selecting varieties, the focus should be on the prevention and control of stem rot.
Facing the summer of 2024CornFor the seven major yield reduction risks, we should choose varieties that are suitable for high temperature and heat damage, varieties with high resistance to stem rot, varieties with good lodging resistance and fracture resistance, varieties that avoid bract defects, varieties with good drought resistance, and varieties with good relative rust resistance. In this way, the risk of production reduction can be better avoided and the summer can be safeguardedCornyield and quality.