Method for prevention and treating common water hyacinthes

A technology for water hyacinth and hydrangea, which is applied in the fields of botanical equipment and methods, chemicals for biological control, animal repellents, etc., can solve problems such as unmanned investigation and research on natural enemies, and achieve good control effects.

Inactive Publication Date: 2008-05-21
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no one has investigated the local natural enemies of water hyacinth in China

Method used

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  • Method for prevention and treating common water hyacinthes
  • Method for prevention and treating common water hyacinthes
  • Method for prevention and treating common water hyacinthes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The laboratory breeding of embodiment 1 hydrangea spider mite

[0019] Pour hot agar water medium (containing 20% ​​agar) into a petri dish, when the medium is about to solidify, stick the leaves of water hyacinth on the surface of the medium, after the leaves are fixed, stick a circle of wet cotton strips around the leaves , hydrangea spider mites can be stocked on the leaves in the center of the cotton circle ( figure 2 ).

[0020] In order to obtain a large amount of Tetranychus hydrangea and make biological herbicide (live body), it is necessary to carry out artificial breeding of Tetranychus hydrangea. Cultivate water hyacinths in a net room (80 mesh gauze, temperature 23-32°C, relative humidity 40-70%) with fertilizer and water, insert hydrangea spider mites into water hyacinth groups, and allow them to reproduce naturally. Usually, one generation of Tetranychus hydrangea takes about 15 days, and more than 20 generations can occur in a year in South China. Hyd...

Embodiment 2

[0021] Embodiment 2 The time and mode of inserting hydrangea spider mite

[0022] 1. Time to access Hydrangea Tetranychus

[0023] The optimum growth temperature for Tetranychus hydrangea is 25-28°C. Most Tetranychus prefer dry conditions, and the relative humidity is generally 40-70%. Rainwater erosion is an important reason for the decrease in the number of mites. Therefore, in Guangdong areas such as Guangzhou, the time to inoculate Tetranychus hydrangea should be arranged after June of the current year and before March of the following year (preferably from September to November of the current year, when the temperature and relative humidity are suitable for the growth of Tetranychus hydrangea). At this time, the weather is relatively dry, and the growth of water hyacinth is slow, while the population of Tetranychus hydrangea grows extremely fast, which can achieve better control effect.

[0024] 2. Production of water hyacinth biological herbicide

[0025] Adult mites a...

Embodiment 3

[0026] Example 3 Evaluation of Hydrangea Tetranychus Control Effects on Water Hyacinth in Laboratory and Net Room

[0027] In the laboratory, individual water hyacinths were cultured in plastic pots filled with Hoagland nutrient solution, and then the plastic pots were placed in insect cages with 80-mesh gauze. Inoculate 10 or 100 spider mites on each water hyacinth. After 18 days, the water hyacinth leaves of the 100 mite / plant treatment group were obviously damaged; after 24 days, the seriously damaged water hyacinth leaves of the 100 mite / plant treatment group had withered, and the affected plants were obviously shorter than the control, and the leaf area was also smaller than the control; The symptoms of water hyacinth damage in the 10 mite / strain treatment group were lighter than those in the 100 mite / strain treatment group ( image 3 ).

[0028] In the net room, the area of ​​the water hyacinth group is 3.24m 2 ( Figure 4 ), near a square shape, several pieces of wa...

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Abstract

The invention involves the field of weeds control, disclosing a prevention and cure method of water hyacinth. The invention makes use of its segmental appendage natural enemy Tetranychus hydrangeae Pritchard & Baker which is in its invasion place to control water hyacinth. Through breeding large amount of Tetranychus hydrangeae in the laboratory artificially, and then in June inoculating them into water hyacinth, so that to achieve the effect of controlling water hyacinth.

Description

technical field [0001] The invention relates to the field of weed control, in particular to a method for controlling water hyacinth. Background technique [0002] Water hyacinth Eichhornia crassipes (Martius) Sloms-Laubach, also known as water hyacinth, hyacinth orchid, narcissus, etc., belongs to the genus Eichhornia of the monocot class Liliflorae (Liliflorae) Pontederiaceae (Pontederiaceae), Native to the Amazon Basin and Brazil in South America, it is now widely distributed in most countries and regions between 40°N and 45°S, and is one of the most harmful aquatic weeds in the world. [0003] At present, the biological control of water hyacinth by using natural enemies in the original place of water hyacinth is the main method to control water hyacinth, among which Neochetina eichhorniae Warner and Neochetina bruchi Hustache are the most widely used. The domestic biological control of water hyacinth began in 1995. The Chinese Academy of Agricultural Sciences introduced ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N63/00A01P13/02
Inventor 胡新军张古忍
Owner SUN YAT SEN UNIV
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