Occurrence and control techniques of rice stem borer in Yunyang County, Chongqing City
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Aphids are important pests in rice production in Yunyang County. The second-instar cluster sheaths cause damage to rice sheaths, and the third-instar drill collar causes dead heart. Rice leaves with dark green leaves and large fields have large eggs and suffer heavy damage. First, the overwhelming insect source: March 5 investigations, locusts per mu insects 0-60 heads, an average of 20 heads. Compared with last year's 393.33 heads, it has been greatly reduced, but it still has enough insect resources to cause harm. 2. Under the lights: On March 29th, it was lighted until May 8th. There were altogether 58 lure moths under the light (the lure light was a good report light), which was 182 less than 240 in the same period last year. Third, the control of the appropriate period: the moth under the light to see the adults on April 3, the light moth period April 26-May 3, according to the temperature conditions and the development of the stagnation, the cricket egg hatching peak period of 5 Month 10-18. The suitable period for controlling locusts is the best control effect when the egg hatching period or the field dry sheath rate is 3-5%. This year the low mountains (below 400 meters above sea level) are 18-25 days, and the elevation is every 100 meters. Should be postponed for 2-3 days. Fourth, control agents and methods: 1, Mu with rice security No. 1 a packet of urea or poisonous soil applicator. 2, mu with a speed killing 100-150 grams or 80-100 ml killing or 100-150 milliliters of solution 1000 milliliters or enoxaparin 80-100 ml, both watered 50 kg spray. 3, attack 2000-2500 times spray. V. Protecting the environment and protecting health: The use of methamidophos, omethoate, isocarbophos, carbofuran and other highly toxic and high-residue pesticides is strictly prohibited when controlling rice borers. When the above-mentioned chemicals are controlled, they cannot increase the dose to reduce environmental pollution.