Bean Bacterial Halo Blight

Symptoms

The main leaves were invaded and irregular water-soaked spots appeared on the upper leaves or new leaves. A halo of 0.5-1 cm in diameter appeared around the spots. Bacterial pus overflowed on the spots, and leaf vein necrosis was easily caused by leaf vein infection. Perforation or shrinkage deformity; fruit pods infected with disease began to appear immersed spots, after browning shrinkage and subsidence, spotted oozing bacteria, or lesions in the center of the dead point is small, but the surrounding halo wide, different from bacterial disease.

Occurrence

The disease is spread mainly through seeds. It is reported that the prevalence of seeds is 0.02%, which can cause the epidemic. During the growth phase, the disease is mainly invaded by stomata or mechanical wounds, sometimes causing systemic infection. In addition to kidney beans, soybeans and other legumes can also be infested. Cold, wet areas are prone to disease. At a lower temperature of 16-20°C, the incubation period is 2-3 days and the symptoms are typical. At 28-32°C, the incubation period lasted 6-10 days. The disease was mild and the halos disappeared, but there were more pathogenic bacteria in the host.

Control methods

The selection of disease-resistant varieties, due to different varieties have obvious differences in resistance; and strict seed disinfection.

L-Carnitine

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CAS541-15-1 Hot Sale High Quality L-Carnitine Powder
Product name:
L-Carnitine
Appearance:
White crystalline powder
Purity:
99%min
CAS:
541-15-1
Molecular Formula:
C7H15NO3
Molecular Weight:
161.20
EINECS:
208-768-0
Introduction:
L-Carnitine is a nutrient that is derived from the amino acids lysine and methionine. Its name is derived from the fact that it was first isolated from meat (carnus). L-Carnitine is not considered a dietary essential because it is synthesized in the body.

The body produces carnitine in the liver and kidneys and stores it in the skeletal muscles, heart, brain, and other tissues. But its production may not meet the needs under certain conditions such as increased energy demands and therefore it is considered a onditionally essential nutriention. There are two forms (isomers) of carnitine, viz. L-carnitine and D-carnitine, and only the L-isomer is biologically active.
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