In the case of insects, it is necessary for people engaged in agriculture, forestry, animal husbandry and fishery to have such information, and measures can be taken in time to avoid the adverse effects of insect pests. Basically, many workers have their own experience, but some methods There are too many drawbacks, and it is not particularly accurate. Compared with the insect report lamp, it is not particularly convenient. The following is a statistical overview of the occurrence of P. armeniasis in Huashan Mountain. Song has a place in the ecological achievements of artificial aerial sowing in Liangshan Prefecture and Xichang City. In recent years, a large number of Huashan pine forests have been newly built in the project of returning farmland to forests and natural forest protection, which has played an important role in promoting the ecological construction of Xichang. Huashan pine ball borer is an important pest that damages Pinus armandii, and it directly damages this ecological outcome. Therefore, it is particularly urgent and important to do a good job of forecasting, forecasting, preventing and controlling the Pinus huashanensis. This article will start with the forecasting method and solve practical problems in production. According to this standard, the wax index was investigated and calculated, and the forecasting and forecasting methods based on the wax index were used to determine the technical indicators for prevention and control.
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The present situation of the occurrence of Pinus armandi and its investigation methods Huashan pine ball borer, belonging to the family Homoptera, is mainly responsible for Pinus huashanensis branch shoots, accompanied by a large number of white secretions in the breeding process, and causes the occurrence of coal smoke. The growth and development of Huashan Pine have a serious impact, with mild growth retardation and recession, and severe cases wither and die. The biological characteristics of Pinus huashanensis are rather special and complex, and there are not many systematic studies on it. Especially due to the large geographical differences, it is an urgent need to carry out targeted research on this species. In Huashan Pine Forest District of Xichang City, due to uncertain survey methods for many years, forecasting and forecasting has been a difficult point in the investigation and prevention of Pinus armandii. According to the observations of Dashanlin and Shijialin districts Huashan pine cones, combined with the research results of other places and the biological characteristics of the classic bulbs, the Huashan pine bulbs are small in size, reproduce in large numbers, breed rapidly, and overlap in generations. The camp's parthenogenetic reproduction, these characteristics give the author a great deal of difficulty in the actual production of insect pest investigation and prevention and control indicators. Therefore, how to formulate a set of investigation methods that are suitable for its occurrence characteristics, scientific and practical, is very necessary in production practice. The disadvantages of the traditional methods of forecasting and forecasting of Huashan Pines were previously used to survey the Pinus huashanensis. That is to say, in the surveyed forest areas, standard sites were set up, and sampling surveys were conducted at the survey sites. Samples from different directions in the east, west, south, and north were further taken from the sampled plots for population surveys.
Using this survey method has many drawbacks. 1. It is very cumbersome. In order to obtain accurate and reasonable sampling, the number of specimens drawn in different directions is relatively large and it is extremely inconvenient to operate in forests. 2. Counting workload is large and operation is difficult. Due to the small size of the Pinus armandii and the presence of waxy secretions, the possibility of shaking off or concealing the insect is very high. Counting is difficult and the accuracy is poor. 3. Because the Huashan Pine ball is small and has a large number of individuals, it is not easy to determine prevention and control indexes according to the sampling results, and it is fuzzy and not intuitive. 4. With the increase of tree age, the tree height is also rapidly increasing. Investigation with this method of sampling sample trees is quite difficult and inaccurate in the middle and high-level Huashan pine forest area. Comprehensively determine several major drawbacks, the current survey method, in the actual production of operability and production of practicality is extremely low, obviously not the best method of investigation. 
The new survey method explores how to make the forecasting and forecasting survey method of Huashan Pine Ball Screws scientific and accurate and practical and convenient in practical application of production. Based on many years of work experience, the author believes that we must first clarify the damage mechanism of Pinus huashanensis, and secondly we must fully understand the biological characteristics and ecological learning of Pinus huashanensis. On this basis, a method for predicting and forecasting the scientific and practical pest forecast lamp is developed to meet the hazard characteristics of the insect species. 1 The hazard mechanism of Pinus armandi of Huashan Pine is shown in a block diagram to reveal the damage mechanism of Pinus armandi: from Figure 1 we can see that Pinus armandi invades the host under appropriate environmental conditions, and after reproduction, it causes physical damage to the host. The key link between A and B is that the essential relationship is that the increase in the number of populations leads to an increase in damage, and the phenomenon is that there is an increase in white secretions. This is a phenomenon that embodies the essence and determines the interdependence of phenomena. This phenomenon indicates that the population size of Pinus huashanensis is directly proportional to the secretion of wax, and it is also proportional to the degree of damage to the host (see Figure 1). 2 Introduction of the concept of wax degree As a result, the author introduced a concept that is the degree of wax (percentage of wax coverage of the host shoots) to calculate the degree of coverage of wax secretion by the insect. This was used as an important parameter for investigating the damage rate of Huashan Pine. The calculation formula is: waxed degree = number of wax sticks, number of branches to be surveyed × total number of branches × 100% 3.3 and undertaking of traditional disease investigation methods. Based on the concept of wax degree, the investigation methods and traditions of Huashan Pine Balls were studied. Disease investigation methods are combined to characterize host damage as being the degree of wax. The degree of wax will be divided into five levels (see Table 1 for details), and use this as a basis for conversion. 
The wax index is calculated as: 
The wax index is in the range of 0 to 100, full health is 0, and no more than 30 does not require control; the wax index is 30, physical or biological control is required; and the wax index is 30 or more, chemical drug control is necessary. Through the analysis of Table 2 and Table 3, the above methods have been used in the forecasts of 2007, 2008, and 2009 in the area of ​​the Dawu Forest Farm, Wuhuashan Pine Cone, with an accuracy rate of over 80%. This ensures that the field investigation ensures accuracy. The situation has greatly shortened the sampling time.
With simple, scientific, and practical methods, the past research on the rate of strains and density of insect populations in Pinus huashanensis has changed from the cumbersome, inconvenient, and inaccurate disadvantages. The new survey method has strong operability for the grassroots technicians in practical production applications. In particular, through the investigation of the wax index, combined with factors such as physical factors, natural enemies and other factors, it is possible to quickly and easily determine the hazard level of Huashan pine ball borer, determine prevention and control indicators, implement prevention and control strategies, and better serve production practice.
