Recently, someone on the Internet asked: How does Bacillus thuringiensis control the cabbage caterpillar? The general saying is: 100-150 grams of wettable powder per acre, 50-70 kilograms of water spray.
In the chemical control of cabbage caterpillars, due to the continuous use of pesticides for many years, the cabbage caterpillars are resistant to chemical pesticides such as pyrethroids. As a biological bacterial insecticide , Bacillus thuringiensis is mainly based on stomach toxicity and safe and non-toxic [1-2]. In order to find out the effect of Bacillus thuringiensis WP on the field control of Pieris rapae, this experiment was carried out. 1Materials and methods 1.1 The tested varieties of the tested vegetables were assisted by the brand of white broccoli, and the control object was cabbage caterpillar. 1.2 The test drug was tested by Bacillus thuringiensis as the 32 000 IU/mg Bacillus thuringiensis WP produced by Jiangsu Qiayi Agrochemical Co., Ltd. The control agent was 4.5% beta-cypermethrin EC produced by Huabei Pharmaceutical Group Ainuo Co., Ltd. 1.3 Test design test Set up 5 treatments (per dose per 667 m2): Bacillus thuringiensis WP 33.3, 43.3, 53.3 g, 4.5% beta-cypermethrin EC 30.0 mL and clear water control (CK), 4 replicates per treatment, a total of 20 The cell has a cell area of ​​15 m2 and is designed by a random block. After the above-mentioned test dose is converted into the amount of the plot, it is evenly sprayed on the front and back of the blade with the Gongnong-16-type knapsack hand sprayer at the peak of the larvae of the cabbage larvae (May 21). The amount of liquid per 667 m2 is 60 L. .
IECEx Approved Coriolis Mass Flow Meter
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The meter can be connected with computer as follows. Connect the meter and computer with a USB-to-RS485 converter( converter A+ end to transmitter A+ end, B- to B-, and GND to GDN); turn to device manager of the computer to check COM port connected with meter. Start the software, select the right COM port and click Connect; do not change any other parameters (if you do not know the right one, click Automatic options on the left, click Connect, plug & unplug the transmitter, and then check if it is connected). You can click Connect on the tool bar to disconnect or connect again. It will shown Connected/Not Connected at the bottom of this interface.
The flow direction is settable. There are 4 options, forward(default), reverse, absolute value & bi-direction. There is a direction mark on the sensor. Forward means the same direction with the mark on sensor, the meter will only count the flow in this direction; reverse means the opposite direction of the mark, the meter will only count the reverse direction; bidirectional means that the meter will measure both directions, it increases when it is forward and decreases when reverse; absolute means it increases no matter it is forward or reverse.
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Zhejiang Sealand Technology Co., Ltd. , https://www.sealandflowmeter.com