Recently, a large number of peach tree growers have reported that this year's peach aphid occurred early and heavy compared to previous years. Except for the difficulty of governance, it has been rare in recent years.
In the case of 10% imidacloprid WP, ​​a leading product for the control of aphids, this time last year, every 150 kilograms of water was good for 100-150 grams (ie, 1000-1500 times) of the drug, and 300 grams was used this year. (500 times liquid) The effect is still very poor, some peach trees have even caused a serious curling phenomenon due to peach aphid.
The reason for the analysis is that the warm winter last year was beneficial to the overwintering of Myzus persicae and eggs. The second reason was that the repeated use of 10% imidacloprid, a leading efficient, safe and low-cost product, was rarely used in peach trees for many years. Other alternative pesticide species resulted in a strong resistance to the drug. In addition, there are many species of locusts that damage peach trees. There are subdivisions such as peach aphid, peach acacia, peach aphid, and spiraea. They are widely distributed and are generally endangered. In general, adults and nymphs cluster on buds, leaves and young shoots to suck and sap, causing the wounded leaves to curl irregularly on the back, and even the entire leaf curls like a rope. Peachflies and spiraea are also harmful to peaches. White wax powder accumulates in the leaves and excretes honeydew, which can cause mildew.
Judging from the law of occurrence, peach aphid occurs in Wei County for 20-30 generations a year, peach acaroid mites occur 10-20 generations a year, and others are more than 10 generations. All eggs were overwintered in peach buds and bark seams, and the damaged parts were all leaves. There are two peak periods in April-May and October in the peak period.
In view of the above reasons and the fact that it is very difficult to eliminate the actual situation, the author conducted extensive trials and comparisons and concluded that the following solutions are feasible and feasible.
1. Use "Dingsheng Red Gardenia" brand 40% acetamiprid soluble powder 1875-2000 times to control.
2. Use "5 sweep" brand 50% thiamethoxam water dispersible granules 3750 times liquid + "strong" brand 10% high performance cypermethrin microemulsion 1300 times for prevention and cure.
3. Use "Dagger" brand 70% imidacloprid water dispersible granules 3750 times solution + "Kiteng" brand 10% acetamiprid EC 660 times to control.
2022 New Laser Distance Sensor
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If you are interested in JRT more laser measuring sensors, or you would like buy qty 2 quotation for trial basis, please welcome to contact us.
Kind regards
JRT Team
Chengdu JRT Main Ranging Modules: Industrial Laser Distance Sensors, Laser Rangefinder Sensor , Tof LiDAR Sensors.
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Chengdu JRT Meter Technology Co., Ltd , https://www.infrareddistancesensor.com