Method and precautions for dibutyl ether urea

Dibutyl ether urea is a new type of thiourea high-efficiency insecticide and acaricide. It has contact, stomach toxicity, systemic and fumigation effects, and has a certain egg-killing effect. Low toxicity, which interferes with the energy metabolism of the nervous system, destroys the basic functions of the nervous system, inhibits chitin synthesis to achieve insecticidal and acaricidal effects; but is highly toxic to fish and bees. It is converted into a substance having insecticidal activity under ultraviolet light, and has strong activity against pests which have developed severe resistance on vegetables. It can control aphids, whiteflies, spider mites, noctuidae pests and pests on a variety of crops and ornamental plants.

It is understood that dibutyl ether urea is mainly used as a liquid spray with a wettable powder to prevent and control vegetable Plutella xylostella, Pieris rapae and cotton red spider. Generally, the active ingredient is 20-30 g, and the effective period is 10-15 days.

In order to completely release the toxins of the drug during use, it is necessary to spray in direct sunlight to achieve the best results. The thiourea group on the molecular structure is cleaved by the covalent bond of the sulfur atom under the action of sunlight and multifunctional oxidase to become a carbodiimide having a strong insecticidal and acaricidal action. Therefore, it is preferably used on a sunny day.

3m Tape Measure

The main type of Tape Measure is Steel Tape, followed by fiber tape, which is the tape that everyone often sees. Many people say it is a cloth ruler, and there is also a waist measurement ruler (tailor ruler/clothing ruler belong to this category). In southern China and Hong Kong, the tape measure is usually referred to as a soft ruler or a pull ruler. The material is PVC plastic and glass fiber, which can prevent the tape from being stretched during use.

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