Control methods: Early spring arable land, winter irrigation can kill a large number of locusts; grasshoppers and grasses, crop rotation; strengthen field management, removal of weeds in addition to low insect density. Forage grass can be castrated ahead of time.
(2) Leafhoppers: The leafhoppers are adult, and the nymphs cluster on the back and tender stems of plant leaves, sucking their sap, causing the plants to be stunted, and even the whole leaves die.
Control methods: Chemical control should be controlled at the time of nymph spraying. The commonly used agents include 40% Dimethoate EC 100 times, 50% Yeyu San EC, 90% Trichlorfon 100-500, and 25% Carbaryl WP 500-800 times.
(2) Thrips: Thrips first threaten the back of the leaf; thrips and rice thrips first harm the front of the leaf, both of which can cause discontinuous silver-white streaks and small stains. The severely damaged leaves are often coated with a layer of silver powder, and the period of the damage is mainly seedling stage, sometimes causing large numbers of dead seedlings.
Control methods: 140% of the fruit germ oil 500-1000 times the best effect, the growing season requires multiple sprays. 2 The use of chrysanthemum-killing EC, Chrysanthemum-Emulsion and Chrysanthemum-killing EC is also effective.
(3) Mythimna separata: Mythimna separata is an important pest of the worldwide gramineous plants. All provinces in China suffer harm. The larvae of Mythimna separata are very omnivorous, especially eating grassy plants. The harmful pastures include Sudan grass, ryegrass, and hybrid sudan grasses. The larvae bite the leaves, and the "infant larvae only eat the mesophyll, forming small round holes, 3rd age. After the formation of nicks, 5-6 years of age gluttony. When the damage is severe, the leaves are eaten and the plants form light rods.
Control methods: 1 moth picking eggs: from the beginning of spawning, until the egg-filling period has not stopped, put grass in the field to put 10, 3-5 days per acre to replace once, the egg with a piece of grass to collect Burned, 2 chemical control: available enemy insects, malathion, dusting or spraying. 3 drug seed dressing. Use 400-50% water with 50% phoxim, 50% parathion or 20% isophophate agent.
(4) Scarabs: Scarabs are widespread pests. The larvae of the black cashmere beetle, the brown beetle beetle, and the northern black beetle beetle are called grubs that inhabit the soil. They mainly damage the roots and stems of the plants, cause plant dysplasia or dead seedlings, and also feed on germinated seeds. , resulting in lack of seedlings broken ridge. Adults feed the stems and leaves of plants. The chafer winters in the soil with adults or larvae.
Prevention methods: 1 The implementation of flood and drought rotation; timely irrigation during the crop growing period, not applying unripe organic fertilizer; intensive cultivation, timely suppression of soil, remove field weeds. 2 Soil treatment, 5% carbaryl powder, 22.5 kilograms per hectare, 25-30 kilograms fine, soaked in soil before sowing or use 3% methyl isophorus granules 225-30 kilograms per hectare, spread with seeds Or add 375 kilograms of soil, or add seeds and seeds in a ratio of 1 to 30.
Glyphosate is a kind of non-selective, no residual sterilant herbicides, root weeds is very effective for many years, is widely used in rubber, orchards, mulberry, tea and sugar cane.Main inhibition of enol acetone in plant base shikimic phosphate synthetase, thus inhibiting shikimic element to the transformation of phenylalanine, tyrosine and tryptophan to distract protein synthesis, cause plant death.Glyphosate is through stem conduction to each part of the plant after absorption, can control the single cotyledon and dicotyledonous, annual and perennial, herbs and shrubs more than 40 families of plants.Glyphosate the grave after combined with iron, aluminum and other metal ions and soon lose activity, hidden in the soil of seed and soil microbial without adverse effects.
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