Method for improving ability of paddy field parasitic bee control plant hopper and rice leaf roller

A technology for rice leaf rollers and rice planthoppers, applied in fertilization methods, botanical equipment and methods, rice cultivation, etc., can solve the problems of sharp reduction in the number of natural enemies of pests, increase in pesticide residues, and increase in the base of insect sources. To achieve the effect of improving natural control, promoting growth and reproduction, and improving control ability

Inactive Publication Date: 2008-08-06
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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AI Technical Summary

Problems solved by technology

However, due to the change of rice cultivation system, the increase of rice varieties and cut flower planting area, climate change, and the complexity of foreign insect source areas, the source base of rice planthopper and rice leaf roller has increased, and the number of immigration peaks has increased. Multiple, serious overlapping of generations and aggravated harm
At present, the control of rice pests mainly depends on chemical pesticides, and the long-term continuous use of chemical pesticides not only causes pests to develop resistance, but also leads to a sharp decrease in the number of pest natural enemies, the basic loss of ecosystem service functions, serious environmental pollution, and increased pesticide residues in rice. Serious adverse consequences such as quality decline and increased production costs; and the extensive use of chemical pesticides lead to the emergence of pest resistance and the weakening of natural enemies' natural control capabilities, which in turn lead to rampant pest populations, forming a vicious circle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: (plantation and application of Jinhua black sesame)

[0022] 30 days before transplanting seedlings of single-crop rice or double-crop late rice, tidy up the ridges. The distance between the ridges is required to be 20-60 meters. Remove the plant residues left on the ridges of the previous season, intertill and weeding, so that the soil is finely broken and loose, and the surface is smooth. And lightly apply an appropriate amount of organic pig manure as the base fertilizer; after finishing the field ridge, choose a larger plant type, dark green leaves and white flowers, rich nectaries, a flowering period of up to 40-50 days, good yield, and better water resistance. For strong Jinhua black sesame, sow on demand at intervals of 25 cm, sow 4 sesame seeds in each hole, and the sowing depth is about 3 cm. After sowing, suppress it in time to make the seeds closely connected with the soil, which is good for the seeds to absorb water and germinate; when the seedl...

Embodiment 2

[0023] Embodiment 2: (the test of planting different crops on the paddy field parasitoid control pest ability on the ridge of the field)

[0024] Select a pure rice single-cropping area, organize the field ridges 30 days before rice transplanting, and apply enough base fertilizer; 30 days before rice transplanting, sow sesame (Jinhua black sesame) and soybeans (Zheqiudou No. 3) on different field ridges and Chinese cabbage (Zaoshu No. 5), with the blank as a control, the distance between the field ridges is 40 meters, the distance between sowing sesame seeds is 25 cm, soybeans and Chinese cabbage are planted as usual, and the experiment is repeated 3 times to form sesame, soybeans, Chinese cabbage and blank control. Four districts; rice is transplanted according to conventional seedling cultivation, fertilizer and water management, and no pesticides are used within 40 days after transplanting. The results showed that at the full tillering stage and full heading stage of rice, ...

Embodiment 3

[0025] Embodiment 3: (the effect of different sesame sowing time on paddy field parasitoid control pest ability)

[0026] 30 days, 15 days before single-season rice transplanting and rice transplanting on the same day and 15 days after rice transplanting, sow sesame seeds respectively, form four districts, the sesame sowing method is the same as embodiment 1, and rice transplanting and its management measures are implemented with the same Example 2. The results showed that the parasitism rate of rice planthopper eggs and rice leaf roller larvae in the sesame area sown 30 days before rice transplanting were the highest at the full tillering stage and full heading stage of rice, while in the The rice fields sown 15 days after rice transplanting had the lowest parasitism rate. This is mainly because the sesame seeds sown 30 days before rice transplanting have already begun to bloom one after another about 10 days after rice transplanting, which is conducive to field parasitoids ...

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Abstract

The invention discloses a method for improving the ability of paddy parasitoids to control rice hoppers and rice leaf tiers, which pertains to a technical filed of agricultural biological control of insect pests. The method comprises the following steps: (1) a bund is consolidated 30 days before seedling transplanting of single cropping rice or double-cropping late rice; (2) sesame seed is sowed in the bund 30 days before seedling transplanting, and urea is applied after sesame is in bloom and potassium dihydrogen phosphate is applied on leaf area; (3) pesticide is not allowed to use within 40 days after seedling transplanting and steps such as spraying pesticide under the condition of no wind 40 days after seedling transplanting are carried out. The method of the invention is characterized by labor saving, time saving, simple operation, etc. and can not only improve the ability of paddy parasitoids to control rice hoppers and rice leaf roller but also reduce the application of pesticide with obvious economic, ecological and social benefits. The method can be widely applied in rice cultivation areas.

Description

technical field [0001] The invention relates to the technical field of biological control of agricultural pests, in particular to a method for improving the ability of paddy field parasitoids to control rice planthoppers and rice leaf rollers. Background technique [0002] Rice planthopper (mainly brown planthopper and white-backed planthopper) and rice leaf roller are migratory insects, and are the most important rice pests in southern rice regions of my country. serious threat. The ecological pest control strategy aimed at giving full play to the natural control of natural enemies is an important basis for integrated pest management. It has been considered an effective way to control rice pests ecologically through a series of ecological measures to protect and utilize natural enemies in rice fields. Planting soybeans and other crops or intercropping or crop rotation can promote the establishment of certain natural enemy populations or increase the number and vitality of n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G16/00A01C21/00A01M1/00A01G22/22
Inventor 吕仲贤陈桂华香广伦郑许松徐红星盛仙俏张发成
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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