LY/T 3105-2019Technical regulation for controlling Stauronematus platycerus(Hartig) (English PDF)

4.1 Line inspection

During the larval hazard period, within the host distribution range, carry out inspections along certain representative routes such as forest roads, river channels, and farmland, and take opportunities.

Select 100 plants by mechanical sampling method to see if poplar leaves have window spots, holes and other damage (see Appendix A). Fill in the results of the investigation Road inspection record form, the relevant form see Appendix B. After determining the place and scope of the occurrence, a detailed investigation is set up as required.

4.2 Standard Survey

4.2.1 Standard settings

In the area where the horny bee hornets occur, the units with small worms reaching 10% or more are set up for detailed investigation. Standard floor the volume is generally 0.2 hm2 to 0.3 hm2, and there are not less than 100 host tree species in the standard land.

4.2.2 Identification of standard strains

In the standard area, the normal forests are randomly selected from the standard plants using the diagonal method and the "Z" method; the forest nets can be selected from every 10 to 20 plants.

Survey; generally, no less than 30 standard strains are selected for each standard plot.

4.3 Survey methods

In the larval occurrence period, record whether each standard strain is harmed by larvae, and record the results in the survey statistics table to count the rate of worms and leaf loss, See Appendix B for related tables.

4.4 Occurrence Index

The degree of occurrence is divided into three levels of light, medium and heavy, and the division standard refers to the relevant provisions of LY/T 1681-2006 on leaf-eating pests.

Table 1 Grading standards

Statistical indicators during investigation Degree of occurrence Light () Medium () Heavy () Leaf loss rate of larva (%) < 20 20<= ~ < 60 >=60

5.1 Prevention strategies

Implement the principle of "prevention-oriented, scientific governance, supervision according to law, and strengthening responsibility". Focusing on improving the ecological environment of poplar forests, strengthening Forest management measures, give full play to the role of natural control factors, and comprehensively apply various control measures to prevent and control other important leaf-eating pests of poplar trees.

Take into account the control of this type of pests.

5.2 Prevention methods

5.2.1 Forest management

Afforestation or mixed forest in the right place. In the afforestation design, pay attention to the selection of good poplar varieties and suitable native tree species, and implement block or Strip planning, interplanting other suitable tree species. Specific technologies are implemented in accordance with the provisions of GB/T 15776.

5.2.2 Drug control

5.2.2.1 Reference medicine, dosage and method

Refer to Appendix C.1 for reference medicament, dosage and application method.

5.2.2.2 Prevention calendar

Larvae control is in the 2nd to 3rd instar period. For the specific control history, see Appendix C.2.

5.2.2.3 Safety requirements

In the prevention and control operation, sprays of aircraft such as light helicopters should be operated in accordance with the relevant requirements of LY/T 2024-2012.

Appendix A

(Informative appendix) Morphological characteristics and biological characteristics of Populus dorsalis A.1 Morphological characteristics Females (Figure A.1). Body length 6.0 mm to 8.0 mm. Body black; head and chest black, yellow fins, feet except base of base, front, End of midfoot metatarsus, hind foot tibia, hind foot metatarsus is brown, the rest are yellow; wings are transparent, wings are dark brown, wings are light brown Belly is black. The tentacle whip (above Figure A.3) is long and cylindrical, tapering towards the end.

Males. 5.0 mm to 6.0 mm in length. The antennae of the first whip joint to the four whip knot (below Figure A.3) are flattened, and the length of the first whip knot is four times the width.

The ends of 1 to 6 sections widen laterally like an angle, and the base contracts. Other characteristics are the same as females.

Egg. oval, about 1.3 mm to 1.5 mm long and 0.3 mm wide. It is milky white when it is first born, and is grayish yellow to grayish brown before hatching.

Larvae (Figure A.2). The incubated larvae are 1.8 mm to 2.0 mm long, and the mature larvae are 9.0 to 11.0 mm long. Dark brown head Slightly green, the front edge of the lip base is truncated; the body is bright green, with 4 black spots on both sides of the chest, the chest and feet are yellowish brown, and the body has uneven brown dots.

(Figure A.4). 6.0 mm to 7.5 mm in length. Light green in the early stage, gray-brown to dark brown in the later stage.

Cocoon (Figure A.5). 5.0 mm to 8.0 mm in length. Tawny to tan.

A.2 Biological characteristics the worms occurred in 7 to 8 generations in Henan, Shandong, Jiangsu and other provinces in one year (see Figure A.5 for the annual life history). Every year in mid-late March, 4 Adults emerged in the middle of the month, and the first-generation larvae appeared in late April. The larvae were 5th instar, and the larvae of 1st to 2nd instars swarmed to feed.

Adults emerged in mid-May, second-generation larvae appeared in late May, mature larvae pupated in late May, emerged in early June, and the larval stage was in mid-June.

It was soiled at the end of the tenth month, and experienced eight generations. Adults usually emerge in the afternoon and lay eggs the next day. The number of eggs laid by a single female is between 30 and 50. Eggs lay on the back of the leaves.

There are 1 to 2 eggs under the cortex on both sides of the main vein. In mid-to-late October, mature larvae emerge from the tree, and brown to tan silk cocoons overwinter.

A.3 Host

Beijing poplar Populus beijingensis WYHsu, European poplar P. canadensis Moench, P. nigra var.italica (Moench) Koehne, Salix mtsudana Koidz, and others.

A.4 Distribution

A.4.1 Domestic

Xinjiang, Gansu, Shaanxi, Beijing, Henan, Shandong, Jiangsu, Hubei and other provinces.

A.4.2 Foreign

Europe, North America, Siberia, etc.

A.5 Life History of Yang Righthorn Leaf Bee

Table A.1 Yearly life history of the right-angled leaf bee (Henan, Jiangsu, Shandong)

March April May June July August September October ~ February Upper Middle Lower Upper Middle Lower Upper Middle Lower Upper Upper Middle Lower Upper Middle Lower Upper Middle Lower Upper Upper Middle Lower Overwintering (-) delta delta delta First generation - - delta Second Generation -Third Generation-Fourth Generation-Fifth Generation the sixth generation -the seventh generation Wintering Age - -Note. - larva; - egg; delta ; adult; (-) cocoon.

A.6 Morphology of Young Right-angled Leaf Bee

Figure A.1 Rear view of female A.2 Larvae and damage

Figure A.3 Side view of antennae (top. female; bottom. male)

Figure A.4 Figure A.5 Cocoon

Appendix B

(Normative appendix) Young Right-angled Leaf Bee Survey Record

Table B.1 Checklist of Yang Right-angled Leaf Beetle

County Name. County Code.

Township name. Township code.

Stepping route number. Survey area.

Check whether the name of the longitude and latitude stand is required to set a standard place.

Investigator. Time of investigation.

Table B.2 Standard survey record form

Linban small class name. Small class area.

Forest age. Standard land number.

Stepping route number. Standard land area.

Latitude and Longitude. Altitude.

Standard tree number with worm count (head) Number of surveyed plants Insect strains Insect strain rate (%) Leaf loss rate (%) Light to moderate Investigator. Time of investigation.

Appendix C

(Informative appendix) Reference Pharmacy and Control History C.1 Reference medicament, dosage and application method Drug Type Reference Dosing Method Application Time Bacillus thuringiensis (Bt) 8000 IU/mg wettable powder 1000 g/hm2 ~ 1500 g/hm2 spray 08.00 ~ 10. 00 am 16.00 ~ 18. 00 1.2% bitter - tobacco cream 750 ml/hm2 800 times liquid to 1200 times liquid spray 25% Mildew III suspension agent 400 g/hm2 ~ 500 g/hm2 1500 times liquid ~.2000 times liquid spray 1.8% Avermectin EC 600 ml/hm2 ~ 1000 ml/hm2 3000 times liquid ~ 4000 times liquid spray 600 ml/hm2 ~ 1000 ml/hm2 Pharmacy. Diesel oil (1. 20 ~ 1. 40) C.2 Control calendar Key points of time pest control methods may to August larva According to the characteristics of the first-instar larvae to feed in groups, the worm leaves were manually removed at the same time take into account the moth buds.

Centralized destruction.

Spray 8000 IU/mg Bacillus thuringiensis wettable powder, or 1.2% bitter -Smoke EC or 1.8% Avermectin EC Spray, or 25% Mildew III no. suspension agent sprays smoke.

The larvae were applied before 2nd to 3rd instar, and Combined with other poplar-eating leaves Pest control.

Note. Taking Henan and Jiangsu as an example, the control of poplar leaf bee should be combined with the control of other leaf-eating pests of poplar.