CN103271004A - Overwintering protecting method for ragweed tortricid - Google Patents

Abstract

The invention relates to the field of the protection and the utilization of natural enemy insects, in particular to an overwintering protecting method for a ragweed tortricid. The method comprises the steps that the stalks or the branches of ragweed with ragweed tortricid insect galls are acquired outdoors from the end of September to early October, the length of the stalks or the branches is maintained to be 50-60cm, the stalks or the branches are placed in a ventilated woven bag to be carried back and are orderly arranged on a storage room insect breeding rack, black curtains are drawn indoors to shield light, indoor temperature is controlled to be 4-8 DEG C, and indoor humidity is controlled to be 60-80%. In the early March of next year, indoor temperature control and indoor humidity control are stopped, and the black curtains are opened. From the end of April to early May, the stalks and the branches are released on the ragweed generating areas of each province in the south. The survival rate of aged insects, mature insects and larvas of the ragweed tortricid manually protected and processed is compared with that of the ragweed tortricid overwintering naturally, and the aim of improving the survival rate of the aged worms, the mature worms and the larvas of the ragweed tortricid can be achieved by artificially controlling conditions (mainly temperature).

Description

The guard method of surviving the winter of a kind of artemisiifolia volume moth

Technical field

The present invention relates to the natural enemy insect protection and utilize the field, relate to the guard method of surviving the winter of a kind of artemisiifolia volume moth particularly.Background technology

Artemisiifolia (Ambrosia artemisiifolia L.) originates in North America, belongs to composite family, Ambrosia, is a kind of pernicious invasive weed of extensive distribution.Artemisiifolia is imported China in early 1930s, afterwards, diffuses to 21 provinces and cities (district) in China northeast, North China, Central China, East China and south China rapidly, all brings great harm for China's agricultural production, ecology and social safety and health.

Artemisiifolia volume moth (Epiblema strenuana) belongs to Lepidoptera, Tortricidae, is a kind of important selectivity natural enemy insect of artemisiifolia, and it comes from Bei Meizhou.Artemisiifolia volume moth eats into into artemisiifolia cane or branch with larva causes harm, and forms insect gall behind the larval feeding, blocks nutrient and moisture to the transportation of artemisiifolia plant top, causes the plant growing way weak, short and small, plant can be caused death when serious.Especially in artemisiifolia seedling stage, its control effect to artemisiifolia is very obvious.China Agricultural Sciences Academy Biological Control Institute discharged in the Linxiang, Hunan in 1993, diffused to provinces such as Jiangxi, Fujian, Hubei soon, and artemisiifolia is played positive control action.

Artemisiifolia volume moth survives the winter with mature larva diapause in withered artemisiifolia cane, and spring in the coming year, mature larva was pupated after breaking diapause, pupa through one period aftershaft dissolve adult and carry out mating, female moth egg is on the axillalry bud of artemisiifolia seedling.Because winter low temperature, can cause the mature larva mortality of surviving the winter usually, so that the population basis in spring is lower.

Given this, if can be artificially to the artemisiifolia volume moth mature larva protection of surviving the winter, improve the survival rate of surviving the winter, the increase on this natural enemy insect population basis has science and the practice significance of outbalance for spring.Therefore, through exploring, the invention provides the guard method of surviving the winter of a kind of artemisiifolia volume moth.

Summary of the invention

The purpose of this invention is to provide the guard method of surviving the winter of a kind of artemisiifolia volume moth.

The guard method of surviving the winter according to artemisiifolia volume moth of the present invention comprises step:

(1) by the end of September-the artemisiifolia stem stalk or the branch that have artemisiifolia volume moth insect gall of early October field acquisition, it is long to remain on 50-60cm, is put into to transport neat discharging in the ventilative woven bag back and be placed on preserving chamber and support on the worm frame the indoor black Curtains exclude light of pulling on, 4～8 ℃ of control indoor temperatures, humidity 60-80%;

(2) behind the early March in next year, stop indoor temperature control and control wetting, the black casement is raised; By the end of April-and the first tenday period of a month in May, the artemisiifolia generating region discharges in southern each province.

The present invention discovers that the supercooling point of each worm attitude of artemisiifolia volume moth of directly adopting back from the field reduces and reduces gradually with going into the winter-warm syndrome degree, illustrates that the cold resistance of the attitude larva that survives the winter is stronger.Yet the worm source of these researchs all is some temp. and humidity experiments of carrying out behind the strip off cane, and the survive the winter survival condition of mature larva in cane of surviving the winter is still the unknown.In recent years, we by inquiry, find that artemisiifolia volume moth larvae is survived the winter after, its survival rate is very low.Generally early spring the artemisiifolia seed germination and the mean temperature of growth of seedling be 6-8 ℃, this moment, artemisiifolia volume moth larvae still was in the diapause state.Therefore; the present invention attempts the survival rate that number of ways improves open-air artemisiifolia volume moth mature larva of surviving the winter naturally; finally determine under the indoor low temperature that comparatively relaxes, dark and gloomy condition; whether can improve the survival rate of surviving the winter of artemisiifolia volume moth larvae; through artificial protection handle and the survival rate of open-air artemisiifolia volume moth mature larva of surviving the winter naturally relatively after, finding that artificial controlled condition (mainly being temperature) can reach improves the purpose that artemisiifolia volume moth mature larva is survived.

Embodiment

Embodiment 1

1, basic facilities

Preserving chamber: area is decided on raising scale, generally can 20～30m ², window is installed stainless steel screen window, and install ventilating fan do to ventilate with and 1.5 air conditioner control temperature in the insectary;

Support worm frame: 150cm * 50cm * 195cm foster worm frame several, each shelf divides 2 layers, every layer of thicker clear glass or plastic plate of bottom pad one deck quality;

2, gather in the worm source

Annual by the end of September-the artemisiifolia stem stalk or the branch that have artemisiifolia volume moth insect gall (each insect gall generally contains a mature larva) of early October field acquisition, it is long to remain on 50-60cm, is put in the ventilative woven bag, transports back indoor.

3, the store method of surviving the winter

The above-mentioned woven bag of filling the artemisiifolia cane of band artemisiifolia volume moth insect gall is neatly put on the foster worm frame the indoor black Curtains exclude light of pulling on, 4～8 ℃ of control indoor temperatures, humidity 60-80%.Behind the next year early March, stop indoor temperature control and control is wet, the black casement is raised; By the end of April-and the first tenday period of a month in May, the artemisiifolia that protection is survived the winter volume moth worm source is transported to southern each province artemisiifolia generating region and discharges.

The method according to this invention; selected artemisiifolia volume moth is a kind of natural enemy insect with host specificity, no ecological risk; after protection is survived the winter; be discharged into each artemisiifolia generating region; can effectively improve overwinter generation worm source radix; saving the departmental cost of artificial scale breeding of later stage, is that a kind of effective artemisiifolia natural enemy insect protection utilizes measure.

4, the survival rate of surviving the winter and protecting the back artemisiifolia to roll up moth larvae

2008, adopt back the artemisiifolia cane in by the end of April, 2009,2010 respectively from the field, statistics finds that the mature larva survival rate is 14.8%-17.4% after the strip off; The mature larva survival rate is 84.3%-86.7% and indoor protection is survived the winter.

The indoor protection of table 1 is survived the winter and the field artemisiifolia volume moth larvae survival of surviving the winter naturally

Claims (1)

1. the guard method of surviving the winter of an artemisiifolia volume moth is characterized in that described method comprises step:

(1) by the end of September-and the artemisiifolia stem stalk or the branch that have artemisiifolia volume moth insect gall of early October field acquisition, it is long to remain on 50-60cm, is placed on preserving chamber and supports on the worm frame, the indoor black Curtains exclude light of pulling on, 4～8 ℃ of control indoor temperatures, humidity 60-80%;

(2) behind the early March in next year, stop indoor temperature control and control wetting, the black casement is raised; By the end of April-and the first tenday period of a month in May, the artemisiifolia generating region discharges in southern each province.