CN111492906A - Green comprehensive prevention and control method for southern melon vegetable thrips - Google Patents
Green comprehensive prevention and control method for southern melon vegetable thrips Download PDFInfo
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Abstract
The invention discloses a green comprehensive prevention and control method for southern melon vegetable thrips, and relates to the technical field of agricultural planting. The method comprises the steps of disinfecting soil by utilizing sufficient photo-thermal conditions in southern areas of China to kill adult thrips, nymphs and pupae, improving plant immunity by cultivating strong seedlings, additionally applying organic fertilizers and Chinese herbal medicine extraction nutrient solutions, reducing application of chemical fertilizers and the like to carry out Chinese medicine type active defense on diseases and pests, controlling the number of thrips by releasing natural enemies such as predatory mites and predatory stinkbugs in the field, tightly bagging by using insect-preventing mesh bags after fruit setting to prevent the thrips from being damaged fruits, mainly taking agricultural prevention and control, physical prevention and control and biological prevention and control measures as assistance in the field management process, and reducing damage of the thrips to melon vegetables; after the method is comprehensively implemented, thrips can be prevented and controlled from multiple angles and multiple time periods, so that a good thrips prevention and control effect can be obtained, the yield and the quality of the melon vegetables can be improved, the quality safety of the vegetable products can be guaranteed, and meanwhile, the environmental pollution caused by excessive use of chemical pesticides can be avoided, so that better economic benefit, social benefit and ecological benefit are brought.
Description
Technical Field
The invention relates to the technical field of agricultural planting, in particular to a comprehensive method for green prevention and control of thrips in the production of melon vegetables in southern areas.
Background
The cucurbits vegetable belongs to cucurbitaceae crops, comprises wax gourd, anemone luffa, towel gourd, cucumber, balsam pear and the like, has the characteristics of rich nutrition, good taste, storage and transportation resistance and the like, plays an important role in vegetable crops, is also an important vegetable variety in northern south China, eastern west China and Guangdong, Australian areas, and is mainly planted in southern China.
Thrips is an insect with complicated feeding habits, mainly including phytophagy, bacteriophagy and predation, wherein the phytophagy accounts for more than half of the total feeding habits, and is one of important economic pests. The thrips uses imagoes and nymphs to file and suck young and tender tissue (such as tender tips, leaves, flowers, fruits and the like) juice of plants, and the damaged tender leaves and tender tips become hard and curled, so that the plants grow slowly and internodes are shortened; tender fruits (such as the green cucumber, the cucumber and the like) can be hardened after being damaged, the commodity is lost, fruit drop is caused in serious cases, and the yield and the quality are seriously influenced. The thrips has strong reproductive capacity and overlapping generations, can generate 20-21 generations in south China at most one year, and brings serious influence on vegetable production, particularly melon vegetable production.
At present, the common prevention and control method for vegetable thrips is mainly chemical pesticide prevention and control, although the effect is quick, the effect duration is short, thrips are easy to generate drug resistance, and the problems of overproof pesticide residue, environmental pollution, yield reduction of southern melon vegetables, quality reduction and the like caused by serious harm of thrips are caused by excessive use of chemical pesticides. Therefore, a green prevention and control method for vegetable thrips with less pollution and good comprehensive prevention and control effect is needed to solve the problems.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a green comprehensive prevention and control method for southern melon vegetables thrips, which solves the problems of overproof pesticide residues, environmental pollution, yield reduction and quality reduction of southern melon vegetables caused by serious harm of thrips and the like due to excessive use of chemical pesticides.
(II) technical scheme
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: a green comprehensive prevention and control method for southern melon vegetable thrips comprises the following steps:
s1, selecting land with convenient water supply and drainage, leeward and sunny, windward and fertile soil;
s2, (soil disinfection) fully utilizes the conditions of sufficient light, heat and water resources in southern areas of China, and is matched with lime nitrogen (calcium cyanamide) to disinfect the soil before planting, so as to kill the thrips imagoes, nymphs and pupas hidden in the soil;
s3, cultivating strong seedlings by using 50-hole plug trays and special vegetable seedling substrate, and paying attention to water control, fertilizer control and light exposure in the seedling stage to prevent excessive growth of melon seedlings;
s4, applying 300 kilograms of biological organic fertilizer, 30-35 kilograms of 15-15-15 ternary compound fertilizer and 20 kilograms of calcium magnesium phosphate fertilizer as base fertilizers to each mu during land preparation, applying Chinese herbal medicine extraction nutrient solution to the melon seedlings before and after field planting, starting topdressing after the flowering period, applying 15-15-15 ternary compound fertilizer to the roots, and spraying Chinese herbal medicine extraction nutrient solution and agricultural potassium dihydrogen phosphate to leaf surfaces, so that the plant resistance is improved, and the flowers and fruits are promoted;
s5, (agricultural prevention and control) is covered with a silver-gray double-color mulching film for planting, so that the possibility of pupation of the thrips nymphs when falling to the ground is reduced, field weeds and melon leaf residues with diseases and pests are removed in time, and field hosts with diseases and pests are reduced;
s6, arranging blue sticky trap in the field to trap and kill thrips, wherein the suspension distance between two adjacent sticky traps is 4-6m, the height of the two sticky traps is equal to the height of a plant and is adjusted along with the growth height, and the sticky traps are replaced after being full of insects and are used in all seasons; after fruit setting, closely covering the melons and fruits by using an insect prevention mesh bag to prevent the thrips from damaging the melons and fruits;
s7, alternately spraying entomogenous fungi such as beauveria bassiana, metarhizium anisopliae or verticillium lecanii on leaf surfaces after budding (natural enemy prevention and control), and spraying for 3-5 times every 7-10 days for 1 time; meanwhile, insects which are natural enemies of the thrips are jointly used, and insects which are natural enemies of predators such as neoseiulus barkeri, orius dongypti or lygus lucorum and the like are released for 3-5 times under natural conditions in the field, so that good prevention and control effects on the melon vegetable thrips can be achieved;
s8, (chemical prevention and control) after planting for 8-10 days, alternately irrigating roots of melon seedlings with 1500-fold liquid of 22.4% spirotetramat or 1500-fold liquid of 60 g/L spinetoram, and irrigating the roots 1 time every 10 days and 2-3 times continuously; when the density of thrips is high, 1500-fold liquid of 11 percent spirotetramat and 11 percent thiacloprid compound preparation, 1000-fold liquid of 1 percent abamectin and 3 percent acetamiprid compound preparation or 1500-fold liquid of 60 g/L spinetoram are sprayed on the leaf surfaces, and the spraying is carried out for 1 time every 7 to 10 days and for 3 to 5 times in total.
Preferably, under the condition of sufficient light, heat and water resources in southern areas, lime nitrogen (calcium cyanamide) is applied in a matching manner, 50-60 kilograms of lime nitrogen is uniformly applied to each mu of soil, then the soil is uniformly ploughed, water is sprayed or irrigated to keep the water content of the soil above 80%, the soil is tightly covered by a transparent film for disinfection, the soil is tightly dried and tightly covered for 20-25 days, and the film and the ploughed land mass are uncovered 8-10 days before field planting.
Preferably, the Chinese herbal medicine extraction nutrient solution is prepared by blending, microbial fermentation, extraction and chelation of medium and trace elements of various Chinese herbal medicines, contains more than or equal to 2 hundred million/g of effective viable count of lactobacillus casei, 500 times of solution is applied to the melon seedlings in a sprinkling mode 3-5 days before the melon seedlings are fixedly planted, 200 times of solution is applied to the melon seedlings in a sprinkling mode 5-6 days after the planting, then 1 time is applied in a sprinkling mode every 10 days, 3-5 times of continuous sprinkling mode is applied, 300 times of solution is sprayed to the leaf surfaces in the fruiting prosperous period, and 5-6 times of solution is sprayed in a sprinkling mode every 5-7 days.
Preferably, the 15-15-15 ternary compound fertilizer is dissolved and diluted into a 0.3-0.5% aqueous solution for root irrigation, applied for 1 time every 7-10 days and continuously applied for 2-3 times, and the agricultural monopotassium phosphate is diluted for 200 times and then sprayed on the leaf surface for 1 time every 5-7 days and continuously sprayed for 3-5 times.
Preferably, the insect-proof mesh bag is a white insect-proof mesh bag with 40-60 meshes, and when the insect-proof mesh bag is sleeved, the young melon is ensured not to have thrips, and the opening of the mesh bag is sealed.
Preferably, the beauveria bassiana is 100 hundred million spores/g, the using amount is 600-800 ml/mu, the metarhizium anisopliae is 80 hundred million spores/ml, the using amount is 60-90 ml/mu, and the beauveria bassiana is sprayed for 1 time every 7-10 days and for 3-5 times in total.
Preferably, the early release amount of the neoseiulus barkeri is 80-100 heads per square meter, the release amount is 200-300 heads per square meter when the pest is serious, the early release amount of the orius donutus is 2-3 heads per square meter, the release amount is 10-15 heads per square meter when the pest is serious, the early release amount of the orius fumonis is 2-3 heads per square meter, the release amount is 10-15 heads per square meter when the pest is serious, the release is alternated and released for 1 time at intervals of 10-15 days, and the release is performed for 3-5 times in total.
(III) advantageous effects
The invention has the beneficial effects that: according to the green comprehensive prevention and control method for the southern melon vegetable thrips, soil disinfection is carried out on a plot before vegetable planting by utilizing the sufficient condition of southern light and heat, adult thrips, nymphs and pupas in the soil are killed, a part of thrips are solved from the root, and a good growth environment is provided for planting of vegetable seedlings; in the growth period of vegetables, the traditional Chinese medicine achievement and the traditional Chinese medicine 'health preserving' concept are applied to crop production by reducing the application of chemical fertilizers, increasing the application of organic fertilizers and extracting nutrient solutions from Chinese herbal medicines, so that the immunity is enhanced, the resistance is improved, and active defense is performed on diseases and pests; by adopting comprehensive measures of mainly agricultural prevention and control, physical prevention and control and biological prevention and control and secondarily chemical prevention and control, the influence of thrips on the vegetable in the growth process is further reduced; by tightly covering melons and fruits with the insect-proof mesh bag, thrips are prevented from being harmful to vegetables, good thrips prevention and control effects can be achieved, the yield and the quality of the melons and vegetables can be improved, environmental pollution caused by excessive use of chemical pesticides can be avoided, quality safety of the vegetables is guaranteed, and therefore better economic benefits, social benefits and ecological benefits are brought.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: a green comprehensive prevention and control method for southern melon vegetable thrips comprises the following steps:
s1, selecting plots which are convenient to supply water and drain water, are leeward and exposed to the sun, are at windward positions and are fertile in soil for planting;
s2, sufficiently utilizing the conditions of light, heat and sufficient water resources in southern areas of China, and applying lime nitrogen (calcium cyanamide) to disinfect soil before planting to kill adult thrips, nymphs and pupas hidden in the soil;
s3, seedling raising is carried out by utilizing a 50-hole plug and a special substrate for vegetable seedling raising, water, fertilizer and light are controlled during the seedling stage, excessive growth of melon seedlings is prevented, and strong seedlings are cultured;
s4, applying 300 kilograms of biological organic fertilizer, 30-35 kilograms of 15-15-15 ternary compound fertilizer and 20 kilograms of calcium-magnesium-phosphate fertilizer as base fertilizers to each mu during soil preparation, applying Chinese herbal medicine extraction nutrient solution to the melon seedlings before and after field planting, starting topdressing after the flowering period, applying 15-15-15 ternary compound fertilizer to roots, and spraying Chinese herbal medicine extraction nutrient solution and agricultural monopotassium phosphate to leaf surfaces, so that the plant resistance is improved, and the flowering and fruit promotion are realized;
s5, covering a silver-gray double-color mulching film for planting, reducing the possibility of pupation of the thrips nymphs when falling to the ground, timely removing field weeds and melon leaf residues with diseases and pests, and reducing field disease and pest hosts;
s6, arranging blue sticky trap boards in the field to trap and kill thrips, wherein the hanging distance between two adjacent sticky traps is 4-6m, the height of each sticky trap board is equal to the height of a plant and is adjusted along with the growth height, and the sticky traps are replaced after being full of insects and are used all the time in a season; after fruit setting, closely covering the melons and fruits by using an insect prevention mesh bag to prevent the thrips from damaging the melons and fruits;
s7, alternately spraying entomogenous fungi such as beauveria bassiana, metarhizium anisopliae or verticillium lecanii on the leaf surface after budding, and spraying for 1 time every 7-10 days for 3-5 times in total; meanwhile, insects which are natural enemies of the thrips are jointly used, and insects which are natural enemies of predators such as neoseiulus barkeri, orius dongypti or lygus lucorum and the like are released for 3-5 times under natural conditions in the field, so that good prevention and control effects on the melon vegetable thrips can be achieved;
s8, alternately irrigating roots of melon seedlings by using 1500-fold liquid of 22.4% spirotetramat or 1500-fold liquid of 60 g/L spinetoram 8-10 days after field planting, and irrigating the roots 1 time every 10 days and 2-3 times continuously; when the density of thrips is high, 1500-fold liquid of 11 percent spirotetramat and 11 percent thiacloprid compound preparation, 1000-fold liquid of 1 percent abamectin and 3 percent acetamiprid compound preparation or 1500-fold liquid of 60 g/L spinetoram are sprayed on the leaf surfaces, and the spraying is carried out for 1 time every 7 to 10 days and for 3 to 5 times in total.
The method is suitable for planting various southern melon vegetables such as wax gourd, Japanese apricot, towel gourd, cucumber, balsam pear and the like.
According to the green comprehensive prevention and control method for the southern melon vegetable thrips, soil disinfection is carried out on a plot before vegetable planting by utilizing the sufficient condition of southern light and heat, adult thrips, nymphs and pupas in the soil are killed, a part of thrips are solved from the root, and a good growth environment is provided for planting of vegetable seedlings; the growth of vegetable plants can be promoted to be robust, the immunity of vegetable diseases and insect pests can be improved, and active defense can be realized by scientific fertilization and application of Chinese herbal medicine extraction nutrient solution in the growth period of vegetables; by adopting comprehensive measures of mainly agricultural prevention and control, physical prevention and control and biological prevention and control and secondarily chemical prevention and control, the influence of thrips on the vegetable in the growth process is further reduced; the insect-proof mesh bag is used for tightly covering melons and fruits to prevent thrips from damaging vegetables. After the method is comprehensively implemented, the melon vegetables are prevented and controlled from thrips at multiple angles and multiple time periods, so that the good prevention and control effect is achieved, and meanwhile, the pollution caused by excessive use of chemical pesticides can be avoided.
Example (b):
a green comprehensive prevention and control method for southern melon vegetable thrips comprises the following steps:
s1, selecting plots which are convenient to supply water and drain water, are leeward and exposed to the sun, are at windward positions and are fertile in soil for planting;
s2, sufficiently utilizing the conditions of light, heat and sufficient water resources in southern areas of China, applying lime nitrogen (calcium cyanamide) to disinfect soil before planting, uniformly spreading 50-60 kg per mu, uniformly raking the soil, spraying water or irrigating to keep the water content of the soil above 80%, tightly covering the soil with a transparent film for disinfecting, continuously drying and stewing for 20-25 days to kill thrips imagoes, nymphs and pupae hidden in the soil, and uncovering the film and raking the plots 8-10 days before planting;
s3, seedling raising is carried out by utilizing a 50-hole plug and a special substrate for vegetable seedling raising, water, fertilizer and light are controlled during the seedling stage, excessive growth of melon seedlings is prevented, and strong seedlings are cultured;
s4, applying 300 kilograms of biological organic fertilizer, 30-35 kilograms of 15-15-15 ternary compound fertilizer and 20 kilograms of calcium-magnesium-phosphate fertilizer as base fertilizers to each mu of land, topdressing 15-15-15 ternary compound fertilizer (dissolving and diluting into aqueous solution with the concentration of 0.3-0.5% and then irrigating roots) at roots after flowering phase, applying 150 times of Chinese herbal medicine extraction nutrient solution to the melon seedlings before and after planting, then applying 1 time every 10 days, continuously applying 3-5 times, spraying 300 times of solution to leaf surfaces in the fruiting prosperity phase, spraying 1 time every 5-7 days, spraying 5-6 times in total, improving plant resistance, promoting flowering and promoting fruits, spraying 200 times of potassium dihydrogen phosphate solution to the leaf surfaces, spraying 1 time every 5-7 days, and continuously spraying 3-5 times;
s5, covering a silver-gray double-color mulching film for planting, reducing the possibility of pupation of the thrips nymphs when falling to the ground, timely removing field weeds and melon leaf residues with diseases and pests, and reducing field disease and pest hosts;
s6, arranging blue sticky trap boards in the field to trap and kill thrips, wherein the hanging distance between two adjacent sticky traps is 4-6m, the height of each sticky trap board is equal to the height of a plant and is adjusted along with the growth height, and the sticky traps are replaced after being full of insects and are used all the time in a season; after fruit setting, closely covering the fruits with insect-proof mesh bags, wherein the insect-proof mesh bags are white insect-proof mesh bags of 40-60 meshes, and are used for ensuring that young fruits have no thrips and sealing the openings of the meshes to prevent the thrips from damaging the fruits;
s7, alternately spraying entomogenous fungi such as beauveria bassiana, metarhizium anisopliae or verticillium lecanii on the leaf surface after budding, wherein the beauveria bassiana content is 100 hundred million spores/g, the using amount is 600 plus 800 ml/mu, the metarhizium anisopliae content is 80 hundred million spores/ml, the using amount is 60-90 ml/mu, the spraying is carried out for 1 time every 7-10 days, the spraying is carried out for 3-5 times totally, the spraying is carried out for 1 time every 7-10 days, and the spraying is carried out for 3-5 times totally; meanwhile, insects which are natural enemies of thrips are used in a combined mode, insects which are natural enemies of predators such as the neoseiulus barkeri, the orius donutsonii or the adelphocoris loti and the like are released under natural conditions in the field, the early release amount of the neoseiulus barkeri is 80-100 heads per square meter, the release amount of the neoseiulus barkeri is 200-300 heads per square meter when the insect pest is serious, the early release amount of the orius donutsonii is 2-3 heads per square meter, the release amount of the orius donutsonii is 10-15 heads per square meter when the insect pest is serious, the early release amount of the adelphocoris loti is 2-3 heads per square meter, the release amount of the orius linesii is 10-15 heads per square meter.
S8, alternately irrigating roots of melon seedlings by using 1500-fold liquid of 22.4% spirotetramat or 1500-fold liquid of 60 g/L spinetoram 8-10 days after field planting, and irrigating the roots 1 time every 10 days and 2-3 times continuously; when the density of thrips is high, 1500-fold liquid of 11 percent spirotetramat and 11 percent thiacloprid compound preparation, 1000-fold liquid of 1 percent abamectin and 3 percent acetamiprid compound preparation or 1500-fold liquid of 60 g/L spinetoram are sprayed on the leaf surfaces, and the spraying is carried out for 1 time every 7 to 10 days and for 3 to 5 times in total.
As can be seen from the operation and implementation of the embodiment, the prevention and control by using the method disclosed by the invention have the advantages that the average number of thrips collected by each plant is as low as 0-1 after the mature period of the melon seedling plant, and the average number of insect mouths on each leaf is as low as 0-2, so that the prevention and control method is superior to the traditional prevention and control method, and the prevention and control effect is further improved.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A green comprehensive prevention and control method for southern melon vegetable thrips is characterized by comprising the following steps: the method comprises the following steps:
s1, selecting land with convenient water supply and drainage, leeward and sunny, windward and fertile soil;
s2, (soil disinfection) fully utilizes the conditions of sufficient light, heat and water resources in southern areas of China, and is matched with lime nitrogen (calcium cyanamide) to disinfect the soil before planting, so as to kill the thrips imagoes, nymphs and pupas hidden in the soil;
s3, cultivating strong seedlings by using 50-hole plug trays and special vegetable seedling substrate, and paying attention to water control, fertilizer control and light exposure in the seedling stage to prevent excessive growth of melon seedlings;
s4, applying 300 kilograms of biological organic fertilizer, 30-35 kilograms of 15-15-15 ternary compound fertilizer and 20 kilograms of calcium magnesium phosphate fertilizer as base fertilizers to each mu during land preparation, applying Chinese herbal medicine extraction nutrient solution to the melon seedlings before and after field planting, starting topdressing after the flowering period, applying 15-15-15 ternary compound fertilizer to the roots, and spraying Chinese herbal medicine extraction nutrient solution and agricultural potassium dihydrogen phosphate to leaf surfaces, so that the plant resistance is improved, and the flowers and fruits are promoted;
s5, (agricultural prevention and control) is covered with a silver-gray double-color mulching film for planting, so that the possibility of pupation of the thrips nymphs when falling to the ground is reduced, field weeds and insect-resistant melon leaf residues are removed in time, and field insect-resistant hosts are reduced;
s6, arranging blue sticky trap in the field to trap and kill thrips, wherein the suspension distance between two adjacent sticky traps is 4-6m, the height of the two sticky traps is equal to the height of a plant and is adjusted along with the growth height, and the sticky traps are replaced after being full of insects and are used in all seasons; after fruit setting, closely covering the melons and fruits by using an insect prevention mesh bag to prevent the thrips from damaging the melons and fruits;
s7, after budding, (biological prevention and control), spraying entomogenous fungi such as beauveria bassiana, metarhizium anisopliae or verticillium lecanii on leaf surfaces alternately, and spraying for 1 time every 7-10 days for 3-5 times in total; meanwhile, insects which are natural enemies of the thrips are jointly used, and insects which are natural enemies of predators such as neoseiulus barkeri, orius dongypti or lygus lucorum and the like are released for 3-5 times under natural conditions in the field, so that good prevention and control effects on the melon vegetable thrips can be achieved;
s8, (chemical prevention and control) after planting for 8-10 days, alternately irrigating roots of melon seedlings with 1500-fold liquid of 22.4% spirotetramat or 1500-fold liquid of 60 g/L spinetoram, and irrigating the roots 1 time every 10 days and 2-3 times continuously; when the density of thrips is high, 1500-fold liquid of 11 percent spirotetramat and 11 percent thiacloprid compound preparation, 1000-fold liquid of 1 percent abamectin and 3 percent acetamiprid compound preparation or 1500-fold liquid of 60 g/L spinetoram are sprayed on the leaf surfaces, and the spraying is carried out for 1 time every 7 to 10 days and for 3 to 5 times in total.
2. The green comprehensive prevention and control method for southern melon vegetable thrips according to claim 1, characterized in that: the method is characterized in that under the condition of sufficient light, heat and water resources in southern areas, lime nitrogen (calcium cyanamide) is applied in a matched mode, 50-60 kilograms of lime nitrogen is uniformly applied to each mu of soil in a scattering mode and then uniformly turned over and harrowed with the soil, then water is drenched or irrigated to keep the water content of the soil to be more than 80%, the soil is tightly covered with a transparent film for disinfection, the soil is continuously aired and tightly covered for 20-25 days, and the film and harrowed land blocks are uncovered 8-10 days before field planting.
3. The green comprehensive prevention and control method for southern melon vegetable thrips according to claim 1, characterized in that: the Chinese herbal medicine extraction nutrient solution is prepared by blending, microbial fermentation, extraction and chelation of medium and trace elements of various Chinese herbal medicines, contains more than or equal to 2 hundred million/g of effective viable count of lactobacillus casei, 500 times of solution is applied to the melon seedlings in a sprinkling mode 3-5 days before the melon seedlings are fixedly planted, 200 times of solution is applied to the melon seedlings in a sprinkling mode 5-6 days after the planting, 1 time is applied in a sprinkling mode every 10 days, 3-5 times is continuously applied in a sprinkling mode, 300 times of solution is sprayed to leaf surfaces in a fruiting prosperous period, and 5-6 times is sprayed in a sprinkling mode every 5-7 days.
4. The green comprehensive prevention and control method for southern melon vegetable thrips according to claim 1, characterized in that: dissolving and diluting the 15-15-15 ternary compound fertilizer into 0.3-0.5% aqueous solution, irrigating roots, topdressing for 1 time every 7-10 days, continuously topdressing for 2-3 times, spraying leaves after diluting 150 times of potassium dihydrogen phosphate for agricultural use, spraying for 1 time every 5-7 days, and spraying for 3-5 times.
5. The green comprehensive prevention and control method for southern melon vegetable thrips according to claim 1, characterized in that: the insect-proof mesh bag is a white insect-proof mesh bag with 40-60 meshes, and when the insect-proof mesh bag is bagged, the young melon is ensured not to have thrips, and the opening of the insect-proof mesh bag is sealed.
6. The green comprehensive prevention and control method for southern melon vegetable thrips according to claim 1, characterized in that: the beauveria bassiana is 100 hundred million spores/g, the using amount is 600 plus 800 ml/mu, the destruxins is 80 hundred million spores/ml, the using amount is 60 to 90 ml/mu, and the beauveria bassiana is sprayed for 1 time every 7 to 10 days and 3 to 5 times in total.
7. The green comprehensive prevention and control method for southern melon vegetable thrips according to claim 1, characterized in that: the early release amount of the neoseiulus barkeri is 80-100 heads per square meter, the release amount is 200-300 heads per square meter when the pest is serious, the early release amount of the orius donutus is 2-3 heads per square meter, the release amount is 10-15 heads per square meter when the pest is serious, the release amount of the orius baceri is 2-3 heads per square meter, the release amount is 10-15 heads per square meter when the pest is serious, the release is changed and released for 1 time at intervals of 10-15 days, and the release is performed for 3-5 times in total.
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