Soybean and corn need to be pest-proof
The occurrence of lighter weight in most areas of a generation of corn borer has decreased in recent years. The area of ​​summer corn planting in our province is large, and the second generation corn borer will be dispersed and harmed. In addition, the difference in the sowing date of the summer maize is large, and the growth period is not neat. In most areas, the end of the heart leaf stage is inconsistent with the hatching height of the corn borer, which is not conducive to the occurrence of corn borer damage. The provincial plant protection station estimated that the second generation of corn borer occurred in the province with an area of ​​about 3.5 million mu.
In addition, in recent years, the occurrence of corn diseases in our province is relatively common, and the field bacteria are abundant. The Zhengdan 958, Nongda 108, Denghai and Shandan series corn varieties grown in the main producing areas were mostly poor in disease resistance. If the rainfall in August in the major maize production areas along the Huaihe River is too high, it will be conducive to the epidemic of corn diseases such as maize (small) leaf spot, rust, and sheath blight.
A field survey found that the amount of fieldworms in pod moths and pods was small, and the insectivory rate of soybean borers was low last year. Plant Protection Station of the province is expected to occur in the light of pod moth, soybean meal and soybean borer. The larvae of the third instar larvae of pod moth are in early August and the suitable period of prevention and control of soybean borer is August 15-20. The province's three soybean pests have an area of ​​about 3.5 million mu.
The station recommended farmers to use phoxim, Bt, etc. to control corn borer, and to control acetamiprid and imidacloprid in soybean aphids.
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