CN102037879A

CN102037879A - Method for preventing and controlling cnaphalocrocis medinalis at later stage of rice

Info

Publication number: CN102037879A
Application number: CN200910234189XA
Authority: CN
Inventors: 黄后新
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-10-19
Filing date: 2009-10-19
Publication date: 2011-05-04

Abstract

The invention discloses rice diseases and insect pests preventing and controlling technology, in particular a method for preventing and controlling cnaphalocrocis medinalis at a later stage of rice. During July 28th to August 10th, the focus of late rice seedling bed is to prevent and control the postpeak of the third generation of cnaphalocrocis medinalis. The commonly used medicaments are that: 10 to 15 milliliters of 35 percent chlorine insect benzoyl amide and 30 grams of 10 percent imidacloprid; or 3 grams of 80 percent fipronil and 30 milliliters of 12 percent nitenpyram; or 100 milliliters of 40 percent chlorpyrifos and 3 grams of 70 percent confidor. During August 11th to September 12th, the prepeak of the fourth generation of the cnaphalocrocis medinalis is mainly prevented and controlled; and the commonly used medicaments are that: 5 to 10 milliliters of 20 percent chlorine insect benzamide suspending agent, or 100 milliliters of 40 percent of chlorpyrifos missible oil, or 100 milliliters of 20 percent of triazophos missible oil or 100 milliliters of 0.3 percent azadirachtin missible oil. The medicaments are sprayed and the spraying parts are the rice bases as much as possible. The beneficial effects are that: the insecticidal effect on the cnaphalocrocis medinalis achieves the average of above 90 percent, the leaf prevention effect is about 95 percent, and the effects are remarkable.

Description

The paddy rice later stage rice leaf roller the method for preventing and treating

Technical field

The present invention relates to a kind of rice pest Prevention Technique, specifically is the method for preventing and treating of a kind of paddy rice later stage rice leaf roller.

Background technology

The damage by disease and insect harm of paddy rice later stage directly influences output and the quality of paddy rice, have in addition can cause destructive harm.Therefore the control of attention and reinforcement paddy rice later stage main diseases insect pest has great importance to the high and stable yields high-quality that guarantees paddy rice.

Rice leaf roller is one of paddy rice later stage main diseases insect pest.It is a kind of migratory pest, cold hardiness a little less than, adult has the very strong green property that becomes, and likes trooping in the rice field of the light green concealment of grow prolifically.One meets to startle promptly and flies up, and laying eggs has light green habit, likes, leaf wide soft leave dual sides of draping over one's shoulders light green in growth to lay eggs.A female worm generally can lay eggs about 100, looses to originate in the vein both sides of more light green blade back.The ovum grain disperses, and simple grain is in the majority, and minority 2-3 grain is concatenated together, and ovum is very little, and the film shape was through hatching in 3-6 days.Newly hatched larvae is got food mesophyll earlier in lobus cardiacus, translucent small particles occurs, does not generally tie bud; Then climb near the blade tip during two ages, weaving silk is rolled into little bud with blade tip, ensconces food mesophyll in the bud, is subjected to harm hickie to occur.At this moment be that rice leaf blade tip is rolled at the field reveal any symptoms; Third-instar larvae is indulged the leaf roll sheet, forms shape worm bud significantly with a tight waist, at this moment is called the bundle leaf phase; Worm bud strengthens after three ages, and single leaf is eaten 1/4 when above, and larva comes out or transfer on the young leaves volume bud and get food evening, and every larva can be caused harm 5 throughout one's life--10 rice leaves.The mature larva minority is stayed in the former bud and is pupated, and majority is climbed on the rice leaf of rice clump bottom, between the rice stem or pupated in the leaf sheath.Took place 4-5 generation in 1 year in Xinyang, a generation takes place every other month, from generation to generation overlapping phenomenon is arranged, 2 generation the larva peak appear at July and go up, the middle ten days, this moment, single cropping early rice was in the booting stage, and the wheat stubble rice is in late tillering state, organizes tender, be beneficial to insect and get food, this generation is the main generation of hazard rice; Three generations rice leaf roller emergence period egg production peak time early and middle ten days in August, larva are caused harm peak mid or late August, mostly concentrate in the wheat stubble, late rice harm.Four rice leaf roller late Augusts in generation are to early September.

Summary of the invention

The invention provides the method for preventing and treating of a kind of paddy rice later stage rice leaf roller.Be mainly used in the three generations rice leaf roller and four generation rice leaf roller control.

The present invention realizes with following technical scheme: a kind of paddy rice later stage rice leaf roller the method for preventing and treating, specifically:

(1) index for control: hundred clumps of worms in booting stage (ovum) 100-150 heads (grain).

(2) prevent and treat optimum period: between 28-August 10 July, late rice rice seedling bed emphasis is a control three generations rice leaf roller postpeak; Between 11-September 12 August, cure mainly four generation the rice leaf roller leading peak;

(3) medicament commonly used:

Between 28-August 10 July, every mu of consumption:

35% Rynaxypyr 10-15 milliliter+10% Imidacloprid, 30 grams; Or

30 milliliters of special 3 grams of 80% sharp strength+12% Nitenpyrams; Or

Happy 3 grams of precious 100 milliliters+70% Amy of 40% new farming.

Between 11-September 12 August, every mu of consumption:

20% Rynaxypyr suspending agent 5-10ml; Or

40% chlorpyrifos ec 100ml; Or

20% triazophos emulsifiable solution 100ml; Or

0.3% nimbin emulsion 100ml.

Said medicine adopts sprays, and spray medicine position will be sprayed onto the paddy rice base portion as far as possible.

The invention has the beneficial effects as follows: technique scheme on average reaches more than 90% the insecticidal effect of rice leaf roller, protects leaf effect about 95%, and effect is remarkable.

Embodiment

100 mu of experiments through the field on average reach 93% to the insecticidal effect of rice leaf roller, protect leaf effect 95.14%.

Claims

One kind the paddy rice later stage rice leaf roller the method for preventing and treating, specifically:

(1) index for control: hundred clumps of worms in booting stage (ovum) 100-150 heads (grain).

(2) prevent and treat optimum period: between 28-August 10 July, late rice rice seedling bed emphasis is a control three generations rice leaf roller postpeak; Between 11-September 12 August, cure mainly four generation the rice leaf roller leading peak;

(3) medicament commonly used:

Between 28-August 10 July, every mu of consumption:

35% Rynaxypyr 10-15 milliliter+10% Imidacloprid, 30 grams; Or

30 milliliters of special 3 grams of 80% sharp strength+12% Nitenpyrams; Or

Happy 3 grams of precious 100 milliliters+70% Amy of 40% new farming;

Between 11-September 12 August, every mu of consumption:

20% Rynaxypyr suspending agent 5-10ml; Or

40% chlorpyrifos ec 100ml; Or

20% triazophos emulsifiable solution 100ml; Or

0.3% nimbin emulsion 100ml.

Said medicine adopts sprays, and spray medicine position will be sprayed onto the paddy rice base portion as far as possible.