Integrated control of peach leaf roller moth

There are two kinds of leaf roller moths on Peach tree leaf roller moths: One is P. purpurea, and the other is M. leaf roller moth. This article will briefly introduce the specific control measures of the two pests. Peach tree leafrolls not only reduced the number of leaves after harming peach shoots, but also aggravated the germination of the second branch and third branch of the same year due to the destruction of new shoot growth points, and was forced to increase the branching order, disturbing the tree shape, and affecting. Tree branches grow robustly. Peach white stripe purpura hazards characteristics: larvae eat leaves, the first age of the lower epidermis and mesophyll, slightly larger in the tip of the spit pull wire mesh nests into the nest, constant head to more than 10 heads cluster nest leaves into the nicks and holes, With the growth of the worms, the insect nests are enlarged, and the petiole is bitten off and the leaves are in the nest. Many insects adhere to the screen. There are also individuals who are individually damaged by leaf blades. Morphological characteristics: adults. Body length 8-10 mm, 18-20 mm wingspan, body gray to dark gray, the belly edge of each belly pale brown. The tentacles are filamentous, and the base of the male whip has dark gray to black hairy clumps that are slightly spherical. The fore wings are dark purple, with 1 white transverse band at the base of 2/5, and some individuals are white at the base of the leading edge to leucorrhea. The grey rim of the hind wings is dark. The festival is 5 knots. It is a gray and white link. egg. Oblate oval, 0.8-0.9 mm long, pale yellow-white gradient light purple. larva. The body length is 15-18 mm, with dark stripes on the head gray-green, body is mostly purple brown, the front chest shield is gray-green, the back line is wide dark brown, and each side has two yellowish cloud-like longitudinal lines, so the body side presents 3 violet vertical lines, dark brown or purple black buttocks. Gastropoda hook three rings, more than 60. No buttocks. The low- and middle-aged larvae were mostly pale green to green, with a light brown cloud pattern on the head and a broad dark green line on the back, with two yellow-green vertical lines on each side, so that each side showed three green vertical lines. pupa. It is 8-10 mm long, with green chest and wing buds, brown belly, and dark green topline. The back of the tail section is dark brown with raised triangles and 6 hips. Spindle spindle shape, length 11-13 mm, silky brown. Life history and habits. Shanxi is born 1 year and is wintering on the top surface of the canopy and a few in the tree bark and tree holes. Overwintering adults occur from early May to mid-June. The first generation of adults occurs from early July to early August. The adult insects have a phototaxis in the night and night, and the eggs are scattered in the back of the main veins on the back of the upper part of the branches. There are also 2-3 capsules produced together. There are more than 10 capsules on the 1 leaf and the egg period is about 15 days. . The first generation of larvae began to hatch in late May, and in late June, old mature soils began to grow and pluck, and the pupa period was about 15 days. The second generation of eggs is 10-13 days, and the hatching begins in mid-July. In mid-August, the old ripening soil begins to accumulate and phlegm. Adults live for 2-13 days, mostly 7-8 days. Each female can produce 9-189 eggs, usually more than 90 grains. Natural enemies include the Trichogramma and the bees. Macular long-winged moth is another kind of leaf roller moth which threatens peach tip. It is not only harmful to new shoots such as peaches, plums and apricots, but also harmful to apple, jellyfish, du pear and other nuts. Fruit tree. The occurrence and control of this pest has been discussed in the 6th edition of the 647th edition. It was introduced when Comrade Kong Fanqing of Weihai City, Shandong Province, was quoted in the book “The Occurrence of the Leaf Roller”. Therefore, this article is no longer detailed. The chemical control of leaf roller moth can be used to control leafroll moths. Plant-based pesticides can be used: 0.5% alizarin EC (net of fruit and vegetables), larvae sprayed 750-1000 times in 2-3 instars; 0.88% dilute alkaline solution, larvae 1-3 Age 300-400 times more water spray. These pesticides are alkaloids with insecticidal properties extracted from plants, are non-toxic to humans and livestock, have no pollution to the environment and agricultural products, and can be used for the production of pollution-free and green foods. Microbial source of pesticides: Bacillus thuringiensis (Bt), larvae spraying Bt emulsion 1000 times at the age of 1-2, or bacterial powder 200 times; 7721, a variant of Bacillus thuringiensis. When the larvae are 1-2 years old, 400-600 times of the liquid is used; 200-300 times of the larvae are used above the third instar. Such pesticides are low-toxic or non-toxic to humans and livestock, are safe to plants, and are safe to natural enemies of pests, and are used within a safety interval of 2 days. Insecticides: hits, spraying 7000-9000 times during larval stage; 2.5% kung fu, 2.5% enemy killing 2000-3000 times or 10% Uranus 4000-5000 times. (Plant protection expert Tang Dongfang)

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