Aphids are common pests on rapeseed. The conventional control method is to spray pesticides in the growth period of rapeseed, which usually requires multiple doses of labor, which is laborious and laborious. Imidacloprid has good root absorption and conduction properties and has good control effect against aphids.
Seed dressing with imidacloprid can effectively control the damage of aphids in the whole growth period of wheat. Aphids on cruciferous vegetables can also be controlled by applying imidacloprid in the seeding ditch. In order to explore the effect of seed dressing and imidacloprid in the sowing ditch on the control of aphids throughout the growth period, experts conducted trials with imidacloprid and its compounding agents.
The test is divided into two parts: the community test and the field demonstration.
The results of the plot test showed that 5 kg of seed dressing with the insecticide imidacloprid was only effective in controlling the aphid hazard at the seedling stage, and the control effect was 90.79%~100%. The control effect on the aphids in the middle and late rapeseed was not obvious; Using imidacloprid pure drug 40g or 22% imipenem phoxim emulsifiable concentrate (containing imidacloprid 2%, phoxim 20%) 400 ml, using seeding ditch application, the control effect on rapeseed whole growth period aphid was 91.82% ~94.49% and 90.68%~95.34%.
According to the China Pesticide Network , Datian demonstration results show that 40 grams of imidacloprid pure drug or 400 ml of 22% imipenem phoxim emulsifiable concentrate per acre is applied in the rapeseed sowing ditch, and the control effect on the seedling stage aphid is almost 100. %, the control effect of flowering knot angle is still more than 90%, and the effect period is up to 7 months. It can control the damage of aphids in the whole growth period of rapeseed, and it has the effect of treating the underground pests and has no effect on the emergence of rapeseed.
A precise control of LCD cell gap containing liquid crystal is critical to achieving the best display performance. Spherical particles used to control the thickness of the liquid crystal layer must meet stringent requirements such as precise particle size, tight particle size distribution, suitable hardness, and excellent resistance against heat, cold and chemicals.
Silica Spacer,Lcd Spacer,Control The Thickness Of Lcd
Suzhou Nanomicro Technology Co., Ltd. , http://www.nanomicro-technology.com