Huang Shou melon shows Huang Shou melon is yellow normally sufficient subspecies, alias defends melon, yellow bug, Huang Ying to wait, belong to division of armour of elytrum eye leaf, happy event eat the cucurbitaceous vegetable such as cucumber, towel gourd, balsam pear, watermelon, also endanger vegetable of division of the mustard family, leguminous, eggplant. It is melon kind seedling stage is annihilative pest.
Host reachs harm characteristic
Imago is taken feed seedling, leaf and tender bine, make circle or hemicycle notch, serious when mesophyll dispose of, and snap melon seedling, create dead young plant. Also be spent to kill and young melon. Larva bites the root that feed melon in earth, bring about melon seedling entire individual plant is withered dead, 3 age hind eat by moth reachs those who near the area into main root young bine, make melon seedlings dehydrates wilting is withered dead. Also the melon that eat by moth feeds the look unfamiliar that stick the ground to grow, cause decay.
Configuration feature
Imaginal body length 8 ～ 9mm, long elliptic, yellow, only medium, metathorax and n black, there is one weaveform sunken channel in prothorax backboard. Larva grows 12mm, cylinder form, the head is cinnamon, body buff, buttock board, n has the flesh to pledge protuberant, give birth to small wool. Egg grows 0.7 ～ 1mm, oblate form, buff, the surface provides reticulation of hexagonal nest shape. Aurelian long 9mm, spindly, naked aurelian, ivory, abdominal extreme has 2 gigantic thorn shape is protuberant.
Life characteristics
Produce 3 generation of 1 ～ one year. Seam in ground fireweed, fallen leaves and earth with imago in teeming live through the winter, air temperature of the last ten-day of a month amounted to next spring in March the activity begins when 10 ℃ , with the ante meridiem in sunshine hind most fill, from May the middle ten days of a month comes to all can lay eggs in August in Yu Chao's wet surface soil, larva of the middle ten days of a month was filled in June hair, to kill fine root, 3 age it is later kill main root, cause crop entire individual plant is withered dead. Imaginal in July the last ten-day of a month - August ascend to heaven and become immortal of the last ten-day of a month, it is leaf harmful melon, flower or other crop again, happy event is lukewarm very wet, have yellow sex of play dead sex and hasten.
Method of prevention and cure
In advance transplant: With hotbed grow seedlings, in advance transplant, when staying imaginal activity, melon seedling is grown already, can reduce fall victim.
Reasonable intercrop: Melon kind can reduce fall victim apparently with the intercrop such as wild cabbage, celery and lettuce.
Catch artificially: Imago did not work in morning plant dew when fly not easily, can catch artificially, if imago is being taken on fireweed,feed, lian Cao takes bug to pull out together.
The net catchs imago: Cut cloth of white screen window (50 ～ 60) Cm × (30 ～ 40) the diamonds of Cm, seam tall 30 ～ 40cm, diameter the cylinder of 15 ～ 18cm, suture of one aspect of the matter. Within 2d of the 1 ～ after young melon seedling comes up out of land, in every acupuncture point 4 diameters 1cm is inserted all round seedling the left and right sides, tall the small bamboo pole of 40 ～ 50cm (or small club) , deep 10cm of bamboo pole be buried is controlled, be down ringent one aspect of the matter the cover to be on 4 small bamboo pole next, cover seedling, lower end of screen window cloth does not stay with clod impaction seam. Seedling bine tendril grows 30cm to be uncovered later.
In melon Miao Zhou surrounds kind of early spring vegetable: While with gauze after seedling comes up out of land the net is enclothed, it is all round plant boardcast sowing three-colored amaranth, fall the early spring such as certain herbaceous plants with big flowers, water spinach is vegetable,
In plant ash scatters all round plant: Uncovering gauze network, bring wear on tendril while, extract first the partial early spring near melon seedling is vegetable, scatter to make an appointment with the plant ash with thick 1cm or paddy chaff on the earthy surface all round its next, or curium wood chip, still can use ground film to enclothe help advance somebody's career, prevent imago to lay eggs endanger ministry of root of melon seedling plant with larva.
Excise bud of partial male flower: When bud of male flower peep, excise bud of partial male flower, can raise yield, reduce imago.
Zoology prevents and cure: But dolly of tea seed cake, with boiled water dip bubble is moved into mushy, again mix into is irrigated into mucky water around ministry of melon seedling root, every 667m2 uses tea seed cake 20 ～ 25kg. Usable also and nicotian water root of fill of fluid of 30 times soak, kill the larva in earth.
Chemistry prevents and cure: Transplant around comes 5 true Xie Qian, eliminating imago and fill root to exterminate larva is the key of keep a full stand of seedlings. Can use ester of chrysanthemum of 40% cyanogen the fifth of the ten Heavenly Stem clean breast of 8000 times fluid, 0.5% vegetables and fruits is oily 600 ～ the prevention and cure such as 800 times fluid is imaginal.
