Rice planthopper is one of the main pests affecting the stable and high yield of rice in Jiangxi. In order to study the new method of investigation of rice planthopper, under the organization arrangement of Jiangxi Plant Protection Bureau, we conducted a rice planthopper test on the yellow board of the non-sticky worm. Through experiments to explore the effectiveness, accuracy and efficiency of the investigation and routine investigation of the yellow smear of different armyworm densities, and the simplest and most effective investigation method for the investigation of self-adhesiveness, the investigation of rice planthopper by self-adhesive method Provide evidence.
1 Test environmental conditions <br> The test was set up in 3 village groups including Xiugu and Xiaqiao, Guangming Village, Furong Town, Wan'an County. The main crop in the test area is rice, with a total area of ​​about 2,600 mu. It is one of the main survey and monitoring areas for rice pests and diseases in the county. The terrain is flat, the irrigation and drainage is convenient, and the fertility is good. For the rice growing areas over the years, the early rice yield is 400-550kg. The rice in the test area is growing well. 95% of the rice planthoppers in the field are white-backed planthoppers, mainly white-backed nymphs, and 80% meet or exceed the control indicators.
2 Test methods <br> Test accuracy (multi-person field survey) Test, efficiency (the relationship between the number of beats and the number of armyworms), and fixed-point regular survey tests combined with conventional pest monitoring.
The sticky yellow board is a self-adhesive paper sold by a general stationery store. The specification is A4. The stationery is sold in a stationery store with a size of A4.
2.1 Accuracy (multi-person field survey) The peak period of nymphs in the first to fourth instar of rice planthoppers (this requirement was investigated three times in the early, middle and peak periods of rice planthoppers, because the rice fly in Wan'an County after receiving work)è™± has been the peak period, so only once investigated), respectively organized the plant protection professional forecasters (Duan Dekang, Guo Jinxi, Liu Zuohua), farmers (Liu Lianghe, Liu Hui), township planters (Zeng Huizhen, Xie Shengquan) each of the two The person conducts an investigation, and the pen machine sets 10 fields for the survey field. Each person uses a five-point method to sample each field. Each point is taken for two clusters of rice, and each rice is beaten twice; each person per mu uses a armyworm. Yellow plate survey. The name of the investigator, the serial number of the survey field, and the date of the survey are recorded for each of the sticky insect yellow plates, and the number of sticky rice planthoppers brought back to the indoor count is taken.
2.2 Efficiency (the relationship between the number of beats and the number of armyworms) The test is based on the number of rice planthoppers, which are divided into three types: general and small. Each type of field is sampled, and each point is randomly picked up with 2 sticks of rice. A total of 10 clusters of rice were investigated, and each stem of rice was photographed three times in the stem of the rice bush. Each shot was taken with one sticker to investigate the planthopper. That is, each rice shoots once, replaces one sticker, takes a total of 3 times, and uses 3 stickers. The type of rice field to be investigated (multiple, general, and small), the number of rice cultivars and the serial number of the pats, ie the first beat, the second beat, and the third beat, were recorded on each yellow wormwood. After the inspection, bring back the number of sticky rice mites in the indoor count
2.3 Fixed-point regular surveys In the routine fixed-point survey, 10 rice cultivars with more rice planthoppers were selected, and a piece of wood with a length of about 1.3 m was inserted on the side of each plexus rice. A sticker was placed on the 5 slats. It is the same height as the base of rice stems. In combination with a weekly fixed-point survey, the new self-adhesives are replaced every week, and the old stickers are retrieved and the number of non-adhesive cornices is counted indoors.
3 The investigation time was conducted in the group of Xiaguan, Xiaqiao and Shilitun of Guangming Village, Furong Town. On June 16th, the accuracy (multi-person field investigation) was investigated. The efficiency was carried out on June 17 (the number of beats and the armyworm) Quantitative relationship) The pilot survey conducted regular scheduled surveys from June 9 to July 6.
4 Results and analysis
4.1 Accuracy (multi-person field survey) test
4.1.1 A total of 10 806 rice planthoppers were sampled between the groups. Among them, 10,417 nymphs and 444 adult worms accounted for 96% and 4% respectively. Plant protection professional forecasters, non-professional forecasters, and township agricultural technicians photographed 2,956, 2,182 and 5,723 rice plants, accounting for 27.22%, 20.09%, and 52.69%, respectively. The highest insect count in 10 fields was photographed by the township agricultural technicians, and the plant protection professional surveyors took 1 time; the lowest insect volume non-professional surveyors took 8 times, and the plant protection professionals 2 times. The difference between the number of insects surveyed by the plant protection specialists and the number of insects surveyed by non-professional surveyors is not significant, while the farmers and technicians in the townships have a higher number of insects due to the larger size of the rice bushes.
4.1.2 Comparison of the amount of locusts in the rice stalks compared with the conventional survey method. The average number of worms in the 10 plots is 0.45 compared with the average worms in the conventional worm method. There is no difference between the coefficient of the insect method and the coefficient of the insect method; while the field method 4 and the field block 7 have a total of 1 750 and 760 insects, the field insects are higher, and the rice bushes are more dew and rain. The coefficient of the number of insects compared with the amount of conventional worms was 0.20 and 0.28, respectively, which was significantly lower. Because of the higher water level in the field, the field was more humid, and the amount of insects was taken with the conventional method. The coefficient of insects is 0.26, which is lower; the average amount of insects in field 10 is 125, and the coefficient of insects is 0.94 compared with the amount of conventional insects, because the minimum number of rice planthoppers in the field is only 1 250 hundred clusters, so the ratio is higher.
The 10 plots surveyed all reached the control index, which was 1-17 times of the control index.
4.1.3 Accuracy (multi-person field survey) Test results The test shows that the factors affecting the amount of self-adhesive insects are:
(1) Select the size of the larger rice buds and the size of the insects to affect the amount of worms: If you choose larger rice groves, the worms are strong, the amount of insects is large, the strength is small, and the amount of worms is small. If there is a uniform standard for sampling and worming methods, it is feasible to use the self-adhesive to check the rice planthopper in rice fields. The survey results of professional forecasters, non-professional forecasters, township agricultural technicians and ordinary farmers should be different. Big.
(2) The humidity in the field has a great influence on the amount of insects: the humidity in the field is too large, which tends to cause the viscosity of the yellow body of the armyworm to decrease, which directly affects the number of the armyworms. The yellow board of the armyworm loses its viscosity after being wet.
(3) The amount of insects in the field has a great influence on the amount of insects: the space of the yellow scorpion is limited. During the test, we found that when the 笱3 method is used to investigate the field insects in the 2 500-6 000/100 In the case of clumps, the amount of insects taken by the self-adhesive worms is 50% of the field insects surveyed by the conventional worm method; when the conventional worm method is used to investigate the amount of worms in the field of 6,000/hundreds of plexes, do not dry The amount of insects in the rubber worm board was significantly lower than that of the conventional worm method, and the amount of insects was only 20 to 30%. When the conventional worm method was used to investigate the amount of insects in the field of 1,500 or less, the amount of insects was Compared with the conventional worm method, the amount of insects in the field is quite close, more than 90%.
4.2 Efficiency (the relationship between the number of beats and the number of armyworms)
4.2.1 The number of insects in the number of beats and the total amount of insects hit is higher, the number of first, second and third shots of rice planthoppers is 169, 66, 35, respectively. It was 62.59%, 24.44%, and 12.96%; the number of rice planthoppers in the first, second, and third surveys of the average amount of insects was 413, 156, and 80, respectively, accounting for 63.64. %, 24.04%, 12.33%; the number of rice planthoppers in the first, second and third plots of the first, second and third plots were 110, 43 and 17, respectively, accounting for 64.71%. 25.29%, 10.00%. The number of rice planthoppers in the first, second and third plots of the three types of fields was 430, 385 and 188, respectively, accounting for 42.9%, 38.4% and 18.7% respectively. There is a clear agreement on the proportion of three beats
4.2.2 Comparison of the number of insects in the number of beats compared with the conventional survey method Compared with the conventional survey method, the coefficient of the three insects with a high amount of insects, generally and less, compared with the conventional survey method is 0.65, 0.71, respectively. 0.71, the total amount of the three field worms is 0.69 compared with the total amount of the conventional survey method. The coefficient of the insects taken by the self-adhesive method was basically the same as that of the conventional survey method, and there was no significant difference.
The comparison between the self-adhesive and the conventional method (the disc shot is 100%, and the color is the same as the first, second, and third times. Proportion):
When using the self-adhesive to check the rice planthopper, as the number of taps increases, the proportion of each beat is gradually reduced, and the proportion of each beat is relatively stable.
4.3 fixed-point regular survey test
On June 9th, 15th, 22nd, and 30th, the board will be placed once, and on June 15th, 22nd, 30th, and 7th, the stickers will be retrieved. The indoor count will be counted and the result will be recorded. In the table. The results showed that there was no difference between the amount of worms and the amount of dishworms investigated using the yellow smear. When the amount of worms was high, the amount of worms in the yellow stalk was high, and when the amount of worms was low, The amount of the yellow worm is also low. However, the amount of insects caught by the yellow board of the armyworm is much lower than that of the disk when the disk is wormed; when the amount of the worm is low, the amount of the yellow worm and the amount of the worm Close to each other; when the amount of the main 1 was very low, the amount of the yellow worm was even higher than that of the worm.
The time of sticking the rice planthopper on the yellow plate of the sticky glue is 7d. During the investigation, we found that the insects that can be counted on the yellow board of the armyworm are: the insects caught in one or two days, and very large. Part of it is a living body, and there are many stains on the yellow board of the armyworm, which may be the dead body of the armyworm in the first few days. At the same time, the yellow board of the armyworm is placed in the field, and the sticky leaves are more serious, occupying the space of the yellow board of the armyworm. In addition, the yellow paper of the armyworm has also developed a rotten paper phenomenon, and the armyworm is greatly reduced. In order to solve the above problems, and the amount of the insects is consistent with the field, we believe that the time of the fixed-stick sticky rice is 2?3d.
5 problems
(1) When using the self-adhesive investigation, it cannot be carried out when there is dew or rain;
(2) When the rice planthopper occurs, when the amount of insects in the field is too large, the yellow plate method cannot be used;
(3) When the indoor spot is stuck with the rice planthopper, the insect is dead, and the small nymph is difficult to identify, increasing the difficulty of inventory;
(4) Regularly investigating the use of self-adhesive glue, due to the long time of boarding, the sticky board is prone to mildew and is difficult to count;
(5) If it is possible to solve the problem that the board change is very troublesome, the yellow-plate method of the sticky glue can greatly reduce the investigation time in the field.
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