Apple stem pitting virus(ASPV)is an important causal agent of pear diseases.Nowadays,the infection status and molecular characteristics of the virus in old pear
The root-knot nematode Meloidogyne graminicola is considered one of the most devastating pests in rice-producing areas,and nematicides are neither ecofriendly n
To optimize the spatial distribution of cotton bolls and to increase the yield,the relationship between yield components and boll spatial distribution was inves