At present, it is the peak period of the occurrence of pests and diseases of Stevia rebaudiana. At this time, we should do a good job of control of blight, blight, leaf spot, and bridge-building pests. The specific prevention and control methods are as follows: 1. Prevention and control methods of Bacterial Blight: (1) Optional groundwater nursery with good drainage and loose soil; (2) Soil treatment with 50% carbendazim 2 kg per mu before sowing; (3) 1000- 1500 times of carbendazim spray or 500 times watering; (4) If the diseased plants are found, they should be removed timely, and diseased holes should be mixed with ash and quicklime in a mix of 3-1. 2, leaf spot: leaf spot disease is easy to occur from July to October, more damage stems and leaves. Prevention methods are: (1) Pay attention to drainage to reduce soil moisture from May to June, and apply more potassium fertilizer to increase plant disease resistance; (2) Control spraying with 50% Carbendazim 1000 times at the beginning of the disease; (3) Harvesting After the clearing of the garden in time, the burnt stubble was concentrated. 3, white peony disease: 4-5 months more rainfall, soil moisture is too large, often prone to this disease, the disease more than damage the roots. Control methods: (1) Proper close planting, paying attention to ventilation and light in the field; (2) Increasing phosphorus and potassium fertilizers to avoid leggy seedlings; (3) Once diseased plants are found, remove them immediately and apply lime disinfection around the diseased holes; (4 At the beginning of the disease, 50% carbendazim 1000 times can be used to irrigate the ward to control the spread of the disease. 4. Bridge-building insects: also known as californium or scale insects, prevention and control methods: can protect the natural enemy T. urticae, or use 40% omethoate 1000 times spray control, but disabled 20 days before harvest.
Pipettes are among the standard equipment of medical laboratory and allow for exact dosing of liquids, e.g. during blood analysis or for determination of various substance concentrations. Depending upon purpose of use, various pipette types are used in laboratories. Pipettes are completed by various sizes of Pipette Tips. Choosing the right pipette tip comes down to the pipette quality relevant to the devices precision.
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