The trapping effects of frequency-vibrancy insecticidal lamps
In order to explore the technique of trapping and killing peanut pests by frequency-vibration insecticidal lamps and improve the comprehensive prevention and control effect of groundnut pests, in 2009, a frequency-vibration insecticidal lamp was installed in Wangji Town, Yicheng City, a major peanut producing area, and the seizure test of the beetle was conducted. Area provides scientific basis for prevention and control of groundnut pests.
1, materials and methods
1.1. Test demonstration materials Dongbao frequency vibration insecticidal lamp, produced by Jingzhou Dongbao Agricultural Machinery Factory, model DB-II/J, total 30 turns. The installation frequency of the vibration lamp is 100 m.
1.2. Trapping and killing principle The frequency-vibrating insecticidal lamp utilizes the light and wave characteristics of pests, chooses light sources and wavelengths that have a strong trapping effect on pests, induces insect pest fluttering lights, and kills pests through high-voltage power grids. A practical tool.
1.3. Test site Yujiang Village, Wangji Town, Yicheng City, is planted with rapeseed-peanuts, and is a recurrent area for chafers. The village has fertile land, flat terrain, sandy loam soil, and a high level of farmer farming.
1.4 Survey Methods From 20 June to 20 July 2009, investigate the number and types of pests, such as chafers, collected each morning and pay attention to the timely removal of parasites on the high-pressure network.
2, results and analysis
2.1 Types Chafers that harm peanuts mainly include large black chafers, dark chafers, green-green chafers, non-back-wing chafers, black-wool beetles, and woolly chafers. The large black chafer is 16 to 21 mm long, black and shiny; the dark chafer is 18 to 22 mm long, dark brown, and dull; the greenish-red chafer is 18 to 21 mm long, with a brilliance of copper and green; the beetle has no hind wings Length 13-18 mm, no hind wings; Black cashmere beetles are 8-9 mm in length, with fine, dense hairs throughout; Hairy beetles are 17 to 18 mm long, dark brown, shiny, and light yellow on body Fine hair.
2.2, the law of occurrence
1) Feathering unearthed time: In 2009, the beetle began feathering in mid-May and in June 18; in 2008, it began to emerge in mid-to-late April, and in June 13 it was earth. Inconsistent performance on feathering and unearthing time. The main reason is that the effective accumulated temperature ≥ 0°C from April to May in 2008 was 1 209.8°C, the average temperature in April and May was 16.4°C and 23.2°C, respectively, and from April to May in 2009 ≥ 0°C The effective accumulated temperature is 1 128.2°C, the average temperature is 16.3°C and 20.6°C; the effective accumulated temperature in April-May is 81.6°C lower than that in the same period of 2008, and the average temperature in April is lower than the temperature in the same period in 2008. At 1°C, the monthly average temperature in May was 2.6°C lower than the temperature in the same period in 2008.
2) Unearthed Temperature: Chafers generally begin to excavate at an average monthly temperature of 20 to 21°C.
3) Time of excavation: The time of day of the beetle excavation is generally from 20:00 to 20:30.
4) Unearthed period: The 2008 beetle unearthed period is from June 13 to July 29, and the 2009 unearthed period is from June 18 to August 6. The performance of the unearthed period is not fixed every year and is closely related to temperature.
2.3. Unearthed Periods, Types, and Ratios The 2009 beetles began excavation on June 18 and began observation, classification, and counting on June 20 and stopped on July 20. The peak period is divided into two phases: the first is from June 23 to June 29, which is mainly based on the dark beetle, the beetle beetle followed by the ratio of 7.4:1.0, and the second is from July 9 to 14, This period was dominated by green-green beetles, followed by dark beetles, with a ratio of 7.0:3.0; on July 1-8, it was a cool, rainy weather that inhibited the emergence of beetles.
2.4. Effect of frequency-vibration insecticidal lamp killing and killing adult insects A DB-II/J frequency-vibratory insecticidal lamp 30 larvae was erected in the village of Wangji Town, Wangji Town, and the control area was 100 hm2. In the bag (not counted outside the scattered bags, the amount of insects in the bag was equivalent to 1/8 of the total insect killing amount). The total amount of insects collected was 202.234 kg, and 163 109 insects were killed. On average, each insecticidal lamp kills 232.5 g and 187.5 insecticides per day. The maximum insecticidal capacity is 350.0 g, 290.7 and the minimum insecticidal capacity is 80.0 g and 70.1. In total, 1 617.872 kg of adult insects were killed and 1 304 872 of the total number of insects (Table 1).
2.5. Yield loss and larval population analysis An excavation survey was conducted before the harvest of peanuts on September 10. The investigation included the number of peanuts, insect damage, loss rate, number of larvae, and pesticide application. The survey method was Block field distance sources 0, 5, 10, 15, 20, 30, 40, 50, 60, 100, 120 m, soil area taken at each point 0.25 m2, depth of excavation 30 cm, results digging at one point to 2 The head larvae did not excavate larvae (possibly larvae) at other sites, which indicated that the larvae were significantly reduced and the population of larvae was reduced. The highest yield loss rate was 34.02%, the lowest loss was 2.20%, and the average loss rate was 18.06%. , Explaining the effectiveness of the frequency-vibration lamp to kill insects and preserve fruit. The above situation shows that the frequency-vibrating light traps and kills adult worms while disturbing the un-killed adult's life pattern, making it impossible for normal larvae to lay eggs to breed larvae.
3, conclusions and discussions
3.1. The frequency-resonating lamp can effectively trap the beetle. During the activity of the beetle, the frequency and frequency of the vibration-reducing lamp is periodically observed and the trapping quantity and the population structure of the beetle are shown. The frequency-resonant lamp has obvious trapping effect on the beetle, and the total amount of killing beetle reaches 1 617.872 kg, a total of 1 304 872 worms, a large area of ​​significant control effect. At the same time, the use of frequency-controlled lights to control chafers can also effectively reduce the use of chemical pesticides, reduce the pollution of pesticides on the environment, delay the emergence of pest resistance.
3.2, the best spacing of the frequency setting of the vibration lamp can be seen from the test peanut peanut fruit damage rate and distance from the frequency of the vibration lamp is a certain correlation, the optimal setting distance of the frequency vibration lamp every 20 ~ 30m set a frequency Vibration lamp can control the risk rate of mango fruit to the lowest (about 10%). If the distance is too long (more than 80m), the control effect will gradually decrease. The risk rate of mango fruit is generally more than 20%.
Learn about other types of insecticidal lamps: Solar insecticidal lamps
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