A method for predicting insect food selectivity index in different plant communities and its application
A plant community and selective technology, applied in the field of insect ecology, can solve the problems of not considering the availability and availability of food resources, and achieve the effect of wide source of materials, simple operation and easy purchase
Active Publication Date: 2017-09-29
INST OF PLANT PROTECTION CHINESE ACAD OF AGRI SCI
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- Description
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Problems solved by technology
In nature, due to nutrient competition and the availability of food resources, the selectivity of P. asiatica to different foods is affected. The selectivity of food, the previous studies on food selectivity were mostly evaluated by feeding frequency, without considering the availability and availability of food resources
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0028] Embodiment 1, establishment of method
[0029] 1. Test preparation
[0030] The population of P. asiatica was collected by net-catching method, and then the population of P. asiatica was fed in an iron cage of 2m×2m×2m, and the 3rd instar nymphs with the same growth were selected.
[0031] Collect Stipa kelvini, Leymus chinensis and Artemisia frigidi respectively in the wild, take the above-ground parts, and scrub them clean.
[0032] 2. Test treatment
[0033] Set up 9 groups of test treatments (Group A to Group I, each set up 3 repeated treatments, that is, each set up 3 cages). Put 20 third-instar nymphs (the ratio of female to male is 1:1) in each cage of 1m×1m×1m, and put Stipa kelvini, Leymus chinensis and Artemisia frigidiosa (with distilled water) in the cage. The near-root end of each plant was sealed with a plastic bag to keep fresh), and new plants were replaced every 48 hours. The amount of each added plant in the cage of each group of treatments is shown...
Embodiment 2
[0063] Embodiment 2, the application of method (predict the food selectivity index of insect in different plant communities)
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The invention discloses a method for predicting insect food selectivity indexes in different plant communities and application of the method. The method comprises the following steps that quadrats are sampled in a sample area; overground parts of all plants in the quadrats are sampled, and the dry weight of the overground parts is weighed, in other word, the biomass of the plants is weighed; all target insects in the quandrats are sampled, the development stages of the target insects are observed, and the main development stages are determined; a target functional expression in a regression model is determined according to the main development stages, the biomass of krylov needlegrass in each square meter of the quadrats is substituted into X1, the biomass of Chinese wildrye in each square meter of the quadrats is substituted into X2, the biomass of artemisia frigida in each square meter of the quadrats is substituted into X3, and the food selectivity indexes are obtained. The method can be used for predicting the preference of the insects for different foods in an actual habitat. The method can be used for predicting and comparing plant selectivity of the insects in the different plant communities as a reference. The method has important significance in damage prediction of the insects to plants, customization of economic thresholds and dividing of proper insect living areas.
Description
technical field [0001] The invention belongs to the field of insect ecology, and in particular relates to a method for predicting insect food selectivity index in different plant communities and its application. Background technique [0002] The plants in the habitat provide insects with different ecological niches and rich food resources. Insects have different selectivity to rich food resources. The dominant species of plants in the plant community determine the existence of dominant species of insects. The food selectivity of insects is affected by many factors. Factors influence, as far as the plant itself is concerned, the factors that affect insect feeding selectivity include cellulose content and water content, carbohydrate content and protein content. [0003] Insects have a certain degree of selectivity to plants, and the motility of feeding selection is to obtain a balanced diet and provide buffer capacity in response to changes in food quality. The food selection...
Claims
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IPC IPC(8): G06F19/00
Inventor 张泽华秦兴虎黄训兵王广君农向群曹广春
Owner INST OF PLANT PROTECTION CHINESE ACAD OF AGRI SCI