Peanut leaf spot

The symptoms are also called melasma. It mainly damages leaves, petioles, stems and flower shafts. The leaf spot is present on both sides of the leaf, with a round or near-circular shape and a size of 0.5-8mm. The lesion expands and fuses into a large irregular patch. Petiole, stem, and flower axi ......

The main characteristics of urea

Urea is the largest variety of nitrogen fertilizer. Its main advantages and disadvantages are: 1. With high nitrogen content, urea nitrogen content is between 44% and 46%, which is the highest nitrogen fertilizer in solid nitrogen fertilizer. The nitrogen per kilogram of urea is equivalent to 2.4 ......

Cold-branch cultivation techniques

People say that the cultivation of cyanobacteria has "nine deaths and one life". In fact, as long as they grasp their essentials, the reproduction rate is not lower than that of spring and cypress. I have more than 50% of my seedlings in more than three years in the cold cultivation of t ......

PCR experiment technique

PCR (polymerase chain reaction) 【principle】 PCR (polymerase chain reaction) is used to amplify a small amount of target DNA in vitro for analysis. Reaction system: 1 sample DNA; 2 primer, is a synthetic pair of oligonucleotide strands (about 15-20 nucleotides) for amplification betwee ......

To prevent olive fruit from falling ill after harvest

At present, the post-harvest diseases of olive fruits reported at home and abroad are all invasive, mainly caused by pathogenic fungi with latent infestation characteristics, and some are brought into storage during infection in the field. There are: 1. Aspergillus The main disease after fruit h ......

Potted Ornamental Peppers

Ornamental pepper is a perennial herb belonging to the genus Capsicum of the Solanaceae family. Because of its low ornamental value, it is often cultivated as a flower or two. Stem stout, much branched, leaves green, flowers white. The fruit is berry, solitary or clustered, erect, slightly sloping ......