What is the difference between barnyardgrass and barnyardgrass?

Rice paspalum and barnyardgrass are both gramineous plants, and they are common weeds in fields, swamps and ditches, and their similar shapes are always indistinguishable. What's the difference between the two? How to prevent and cure it?

What is the difference between barnyardgrass and barnyardgrass?

Rice paspalum = the leaves grow vertically, the leaf sheath is turquoise, and the seeds are larger; no matter its seedlings, adult plants and seeds can be mixed with rice, causing long-term harm to rice. Barnyardgrass and rice are very similar in appearance. Culms erect, base oblique or geniculate, smooth glabrous. Leaf sheaths loose, lower ones longer than internodes, upper ones shorter than internodes; ligule absent; blade glabrous.

Second, how to control paspalum and barnyardgrass?

Rice paspalum control:

1. Agricultural prevention and control

(1) combined with seed treatment to remove weed seeds, and combined with ploughing and soil preparation to eliminate weed seeds on the soil surface.

(2) regular flood-drought rotation should be implemented to reduce the occurrence of weeds.

(3) improve the quality of sowing, sowing the whole seedling and pressing the grass with the seedling.

two。 Chemical control

The main results are as follows: (1) for the first time, Arojin 50ml / mu + Taiyangxing 15g / mu was used for soil preparation, and the seedlings were planted after 3-7 days interval. The second application was carried out 15-20 days after rice transplanting, using 40-60 ml / mu of Arozine + 10-15 g / mu of solar star (10% picosulfuron can be replaced by 10% picosulfuron), mixed with soil, 4 cm in water layer and kept for more than 5 days.

(2) the control method of rice paspalum in the middle and later stage of transplanting rice field can be used to control barnyard phosphorus (Arozine, containing 300 grams per liter) EC 50ml / mu + 50% dichloroquinolinic acid wettable powder 40g / mu, applied in the rice paspalum 4-7 leaf stage (plant height 10-30 cm), dry water 1-2 days before application, spray volume controlled at 7-10 liters / mu, and normal irrigation 1-2 days after spraying. You can also choose 2.5% of Daojie 80-100ml per mu and spray it in shallow water.

Barnyardgrass control:

1. Artificial prevention and cure

The barnyardgrass is pulled up when it is young.

two。 Chemical control

(1) closed herbicides in direct seeding field can be used with bensulfon propachlor (plus safety agent), pyrimidine propachlor (plus safety agent), propachlor (plus safety agent), etc.

(2) herbicides can be used in stems and leaves after direct seeding field: dichloroquinolinic acid, dichloroquinolinic acid and dichloroquinolinic acid. After 2.5 leaf stage of rice, 10-20 grams of active ingredients per mu and 30-45 kilograms of water were sprayed evenly. When barnyardgrass occurs seriously, pentafluorosulfonamide (Daojie) can be used to spray water evenly with 30-50 ml per mu.

(3) after rice seedling throwing or transplanting, after the seedling took root, barnyardgrass was sprayed evenly with dichloroquinolinic acid, dichloroquinolinic acid and dichloroquinolinic acid at 1-3 leaf stage, 10-20 grams per mu and 30-45 kilograms of water. When barnyardgrass occurs seriously, you can use pentafluorosulfonamide (Daojie) 30-50 ml per mu or 3-4 grams of active ingredient per mu to spray the water evenly.