Many times of rust damage have made summer corn varieties resistant to rust a "standard" - the rust in 2021 has led to the expansion of millions of acres of seeds of a corn variety in Henan, most of which have been "turned commercial". In the years that followed, non-rust-resistant varieties of corn were all but gone.
Compared with corn rust, once wheat rust breaks out, the yield reduction is more serious - in addition to stripe rust, there is also leaf rust, any kind of outbreak, or a combination of two rusts, will directly cause a wheat variety to fall into the "abyss".
First, the "double rust resistance" of wheat varieties depends on the approved disease resistance identification
It is best to identify "resistant" or "moderately resistant" stripe rust and "resistant" or "moderately resistant" leaf rust with a validated resistance.
Secondly, it is "resistant" or "moderately resistant" to stripe rust and "moderately sensitive" (not "high-sensitive") to leaf rust.
Again, there are 2 "medium sensitivities" for stripe rust and leaf rust.
2. Be wary of wheat varieties with "high susceptibility to stripe rust".
Any wheat variety that has been approved for disease resistance identification is [high-susceptibility stripe rust], which is very dangerous - our @北rural网科技科技advisory group is a wheat variety that will never touch [high-susceptibility stripe rust].
3. On the basis of "double rust resistance", it is better to resist "withered white spikes".
This requirement is very high - because the four diseases that cause rhizome rot can cause "white spikes" (total erosion, root rot, stem base rot, sheath blight), and the more resistant to scab, the more likely it is to develop stem base rot (according to the scientific research results of Zheng Hongyuan, a professor at Henan Agricultural University). The more small grains, black grains, and low 1000-grain weight wheat varieties, the greater the risk of "withered white ears".
Fourth, on the basis of "double rust resistance", the approved high-susceptibility disease "the less, the better"
One of the criteria for the selection of wheat varieties by our @北rural网 science and technology advisory group is "highly susceptible to scab" and "high susceptibility to powdery mildew", and the most unprincipled is "high susceptibility to stripe rust", "high susceptibility to leaf rust" and "high susceptibility to sheath blight".
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