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1 Flood Prevention Process in Longjiang County Longjiang County is located in the western part of Heilongjiang Province and is a corn-producing county in the whole province and even in the whole country. The county's arable land area is 364 thousand hectares, and the average planting area of ​​corn is more than 280,000 hectares, accounting for 80% of the total crop area. Maize production accounts for more than 90% of the total crop production. Corn borer is the number one pest in corn production in Longjiang County and has a great influence on the yield of corn. It has become one of the main factors that restrict high yield and stable yield of corn. In recent years, the degree of damage has been on an upward trend. Generally, the annual output loss rate reaches 7% to 9%. The moderate annual output loss rate reaches 10% to 20%. The large annual loss rate of production exceeds 20%, and affects corn. Quality, lower corn commodity grade. From 1992 to 1999, the county used Trichogramma, high-pressure mercury lamps, and BT granules to prevent and control corn borer technology, resulting in a significant reduction in population density and a significant increase in the quality and yield of corn.
However, in the past 10 years, the county did not re-prevent corn borer, coupled with farmers for many years of continuous cropping of corn, and the vast majority of corn varieties are poor in insect resistance, resulting in a large accumulation of insect sources in the field. In addition, because corn borer is a recessive harm pest, the damage loss is relatively insignificant, resulting in insufficient attention from farmers and their unwillingness to invest funds to prevent and control it. Therefore, the damage of corn borer has been increasing year by year, and it has reached the peak of harm. According to the survey, the towns and towns of corn borers in the plains and hills are seriously endangered, and township and township hazards in the semi-mountainous areas are also very serious. The most serious plots of corn larvae in Longjiang Township, Baishan Township, Heigang Township, Huamin Township, and Guanghou Township amounted to 443, and maize yield was reduced by more than 20%. In the past five years, the county averaged more than 120 live larvae of corn borer, far exceeding the control index of 80 heads. In the past three years, the average degree of occurrence was moderate, and corn production was reduced by 10% to 20%. According to statistics, the county corn borer damage yield loss averaged over 10%, according to the average annual gross corn production of 2.25 billion kg, due to corn borer damage yield reduction of up to 225 million kg. Therefore, starting from 2009, the county's flood prevention work has been highly valued by governments and business departments at all levels, establishing national and provincial corn cricket green prevention demonstration zones, implementing the Trichogramma to prevent corn borer, and spraying high-spray sprayer BT. The Prevention and Control Techniques of Controlling Maize Borer by Corn Powder and Pesticide Lamp
From 2009 to 2010, the county uses a DT-15P type insecticidal lamp to seduce the adult corn borer. This lamp uses projection light to lure the corn borer. The corn borer adult has a strong phototaxis to the light of a specific wavelength, and the special long life is used. The light source of a specific range of wavelengths emitted by high-efficiency lamps attracts pests and insects. The lamp is equipped with a light-transmitting impact screen, so that the insects can hit the translucent screen and fall into the reflector during the flight, and then slide down the reflector to the lower side. Collecting barrels can reduce field pests and eggs, and reduce the number of insect populations. After two years of practice, it can significantly reduce the use of pesticides, reduce environmental pollution and harm to natural enemies of pests, reduce damage to humans and animals, and help maintain ecological balance. It is a very environmentally friendly technology for controlling farmland pests. . The projected insecticidal lamp is an advanced and practical tool for physical control of pests with low power consumption, low investment and easy installation. Within 2 years, the county applied projected insecticidal lamps to control corn borer area of ​​0.777 million hm2 in 14 villages, 46 villages and 8,923 households in 4 townships and towns, respectively, and the rate of decline of damaged corn borer and live insects The reduction rate and the reduction rate of wormholes averaged 80.26% for the three prevention and control indicators, saved 7.39% for the grain loss rate, and had an input-output ratio of 1:34.15. The total insect reaped grain was 3.646 million kg. The economic loss was 4,580,000 yuan.
2 Predictions 2. 1 Survey of live larvae and survivors of winter stalks in the winter. In late April, surveys of live larvae and survivors were conducted in 14 townships across the county. The selection bases were larger and the corn plantings were concentrated. The townships and villages in the film are the prevention sites. The specific investigation method is: From April 20 to 25, the survey area for each township shall be no less than 50% of the total cultivated area. Two to five corn stalks were selected for each point, and 20 to 50 strains were randomly selected (each in the upper, middle, and lower sorghum). Above or below the stalk boring, a small knife was used to draw a longitudinal crack, and the larvae were removed from the stalk. The number of live worms and dead worms in the counted and sampled straw was counted to calculate the live larvae and survival rate.
2. 2 The investigation of the progress of phlegm emergence and the deaths during the period are based on townships and townships. There are altogether 5 investigation sites in the villages and villages that determine the lights. The investigation began on June 5 and ended at the peak of Huayu’s emergence. Investigations were conducted once every 5 days. When the slug rate reached 10%, the survey was conducted once a day. For each survey, each township selected 5 straw worms at different locations. Ten live larvae were collected from the upper, middle, and lower quails, and 30 live larvae were examined per locust. Record the number of live insects, the number of ticks, the number of shells, the number of dead insects, calculate the rate of pupa, the rate of emergence, and mortality.
2. 3 Survey of adult growth In each of the townships, five Jiahua type frequency-vibration forecasting lamps were installed at one of the five phlegm-repellent survey sites, and they started at the beginning of corn larvae larvae and lighted overnight to measure adults. Monitoring the dynamics of adult growth, recording the total number of moths, male and female populations.
3 Major technical measures 3. 1 Determination of switch lamp time According to the investigation of phlegm emergence and the measurement of adult mortality by deduce lamp, when the peak of corn mashing and light-induced larvae are at the peak stage, start the trapping and killing adults. In 2009, the lights of this county were from June 25th to July 30th, and 2010 from June 18th to July 20th.
3.2 Operation (1) Villages and villages where corn stalks are piled up in a centralized manner. Install 1 lamp every 200 to 240 m around the stalks.
(2) This lamp uses water to kill the adult corn borer, and it needs to add washing powder to the bucket when it is used. The amount of laundry detergent is more than 50% of the normal laundry addition amount, and the total amount of water is added to near the overflow hole of the bucket.
(3) According to the investigation of the progress of pupa emergence and the measurement of lamp induced adult growth, when the peak of corn mashing and light-induced larvae are at the peak stage, they start to trap and kill adult worms. The light is automatic control, if manually controlled daily light hours from 9 pm to the early morning of the second day.
(4) The lamp charging system consists of a mains plug, a charger and a special plug.
At the end of each day's work, the battery is removed from the lamp holder, and then the battery is charged with the charger.
(5) During the period of pest control, a total of 46 lamp teams were set up to achieve centralized and uniform lighting, unified operations, strict management, and guaranteed control efficiency.
3. 3 Precautions (1) This light is fragile. Be careful when installing, using, storing or transporting it. Take it lightly and gently to avoid bumping.
(2) When using the light in regions where lightning is frequent, lightning protection devices shall be installed to ensure that it is not struck by lightning.
(3) Use and storage should be kept out of reach of children to avoid accidents.
(4) The battery of this lamp cannot be replaced with other batteries.
(5) The trap lamp belongs to a special lamp and cannot be used as an indoor lighting lamp. Otherwise, long-term exposure to UV light from a trap lamp may cause skin damage.
(6) During storage, the battery should be charged daily. The battery should not be charged once before it is used, and it should be charged once every 3 months.
4 Experience in Application The DT-15P projectile type insecticidal lamp uses a maintenance-free battery as a power source, which changes the method of wiring the insecticidal lamp in the past, which consumes less power and is simple and efficient. The light source circuit consists of an electronic ballast and a trap lamp. When the power supply is turned on, the ballast starts the work of the lamp and emits special light waves to lure the pests.
The projection type insecticidal lamp adopts projected light, and has a projection light area, a reflection light area, and a light illumination area, which increases the light illumination angle and height, and expands the space for attracting insects to the widest.
Projection type insecticidal lamp consists of a photosensitive sensor, a rain sensor and a control circuit. After the power switch is turned on, the light and rain control circuit controls the light source to work. which is:
Stop during the day and work at night; stop in the rain and work fine. Simply put, it is light control and rain control.
The power consumption is reduced to a minimum, that is, the power of the DT-15 type insecticidal lamp is 15 W, and the power of the DM-15 electronic extermination lamp is 38 W. It kills a small number of natural enemies of pests and is very safe for humans and animals.
Projected insecticidal lamps are small in size and do not need to set wires, and can be flexibly set. At present, for the sake of fire safety, the accumulation of corn stalks in the village will be uniformly managed outside the village. Therefore, the convenience and flexibility of the projectile insecticidal lamp make its utilization very high.
Since the battery can be installed and removed at any time, occasional battery loss occurs when the straw worms attract insects along the road outside Tun Tun.
Method for controlling corn borer using insecticidal lamp
Insect killing light prevention and control of phototaxis pests is a prevention and control technology integrating advanced nature, practicality, safety, environmental protection, and high efficiency. It has a positive effect on the development of green foods, pollution-free agricultural products and organic foods, and improves the agricultural product classification of this county. It is of far-reaching significance to increase the competitiveness of agricultural products in the domestic and international markets. The projected insecticidal lamp has a low cost and can be used continuously for 3 years at a cost of only 0.45 yuan per 667 m2. Among various pest control measures, the input-output ratio of the technology is the highest, and there is no pollution to the environment. Therefore, in the future, in the prevention and control of farmland pests, we must strive to adopt more of this technology, give full play to its advantages in modern agricultural production, and inject new vitality into the development of ecologically beneficial agriculture.