In addition to the law of the tiger
The ground tiger is a common pest during the spring planting seedling stage. Here are some simple and effective killing methods.
1. Eradication of eggs. The ground tiger, which harms cotton seedlings, is used to producing eggs in the fields (about 70%) and with dry grasses (about 20%). According to this rule, the hatching rate of eggs can be greatly reduced by spawning and cultivating in time.
2. Heap trapping method. After the larvae exceed the third instar, the resistance is enhanced, and the ground spraying is often difficult to receive the desired effect. The grass can be used for trapping, that is, fresh grass is evenly piled in the field in the evening, with 100 piles per acre, and each pile has an area of ​​about 0.1. Square meters, open the grass next morning to kill larvae, so that for 5-10 consecutive days, most of the larvae can be killed. Haystacks are generally replaced every 3-4 days; after the sun is dry, some water can be poured to increase the trapping effect.
3. Poison weed killing method. 30-40 kilograms of fresh weeds are used in the mu, first into a small section of about 2 cm, and then mixed with 90% crystals of trichlorfon 50 grams or 2.5% of trichlorfon powder 500 grams, and mix well and spread in the evening. Good results.
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