The characteristics and prevention methods of aphids

Is a Hemiptera blind blind family. Distributed in Hainan, Yunnan and other places. In addition to harming avocados, it also harms crops such as cocoa, fruits, cashews, pepper, and red durian.
The nymphs and nymphs harmed the young leaves of avocados. The damaged parts showed water-stained, polygonal spots that eventually showed dryness. The adults and nymphs harmed the young fruits, causing the affected parts to show swarf spots and stop the growth. Finally, they also showed dryness. shape.
This insect has a body length of 5-6 mm and a width of 1.2-1.5 mm. Long, khaki, small head, dark brown at the trailing edge; antennae slender about twice as long as the body length, the first section is longer between the head and the thoracodorsal plate; the front of the thoracodorsal plate is reduced in the neck; the small shield The posterior edge is rounded, with a small scutellum angle slightly curved backwards at the front and a small ball at the top; the fore wing is light gray with iridescence; the foot is yellow, with many black spots scattered on it. Eggs resemble a cylindrical shape; milky white; the sides of the egg cover have long, short, white filamentous breathing processes. The nymphs were 5 instars, and the 5th instar nymphs were 5.3 mm long, 1.4 mm wide and long; all the khakis were slightly reddish, and the compound eyes were black; scattered black spots on the antennae; the upper and lower antennae of the third and fourth quarters Black-brown hairs; wing buds developed to the back of the third abdominal section; small scutellum corners complete; feet with gray spots on the leg joints, ganglion black.
The horned lynx occurs 12 generations a year in Hainan, with an average of 1 generation per year requiring 26.1 to 52.2 days. It breeds as usual in the winter. The female adults spawned on the young avocado tissue until the nymphs hatched to injure young leaves and young fruit and dry them. Outside the shoots and young fruit period, it can damage nearby host plants. Take twigs and spray 80% dichlorvos 1000 times to control.

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280mm

150ml

9g

10pieces/pack

300mm

180ml

9.5g

10pieces/pack

320mm

190ml

10g

10pieces/pack

350mm

220ml

11g

10pieces/pack

400mm

230ml

23g

10pieces/pack



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