The control of weeds is the key to successful production of wheat. According to the occurrence characteristics of weeds in the rice fields in wheat fields in Yancheng, we proposed the optimal drug types, the best formulas, and the removal measures of “one kill, two picks, and three drawsâ€.
The characteristics of weed occurrence (1) are numerous. Gramineous weeds include valerian, amaranthus, double-leaf garber, crabgrass, setaria, goosegrass, etc., sedge sedge, sedge, cattle felt, flat stalk, grass, firefly, wild pheasant Other broad-leaved weeds include ear-leaved leech, beakweed, knot-knot, broached gut, dwarf mushroom, and water peanut, among which gramineous weeds have a greater impact on rice yield. (2) Occurrence of early, more peaks of grass. In the wheat field, the weeds begin to germinate 3 to 5 days after the first drowning. Generally, there are two obvious grass peaks. The first peak appears in the 7-15 days after the nesting. Weeds, perennial sedges, and some broad-leaved weeds; the second peak occurs about 25 days after the harvest, and occurs mainly in annual sedges, most broad-leaved weeds, and a few grass weeds. (3) Large quantity and heavy damage. Although the total amount of grass weeds is not high in the previous period, it can quickly become a dominant species as the tillers or stolons grow and spread.
Causes of heavy grass damage (1) No-tillage. The rice fields in wheat are cultivated in a no-tillage manner. The weed seeds are mainly concentrated on the surface of the soil and the germination is not affected, and the residual grass in the wheat field is also easily revived. (2) alternating wet and dry. After the rice culturing, the wheat is allowed to alternate between wet and dry for a long time before the crop is allowed to bloom, which is beneficial to the sprouting of the weeds.
In addition to supporting technology (1) a kill (stem treatment). After the wheat is harvested, the seedlings are mastered in the 2 leaves of the seedlings from the 1st to the 3rd leaf stages, with 25 g/litre of Penoxsulam® oil suspension per acre, 60 ml, or 36% benzyl dichloride wettable powder 60~ 70 grams, add water 50 kg manual spray. Before the application, dry the field water, rehydrate and keep water for more than 5 days after application. When using the formulation of quincloracin, the seedlings must be in the 2 leaf 1 heart period to avoid phytotoxicity. (2) Second pick (mid-term pick governance). At the end of the rice tillering period, picking treatments were applied to the fields with large grasses (4 to 5 leaves), sedges, and broadleaf weeds. The use of 50 g of Penoxsulam Sulfochlor to 80 ml per acre, plus 60 kilograms of manual spray of water, controls alfalfa and some broad-leaved weeds and annual sedges. If there is more gold in the field and the age of the grass is larger (4 to 5 leaves), add 80 ml of 100 g/l of cyhalofop-butyl ester EC per acre. For more than 5 leaves of Qianjin, the amount of 100 gram per liter of cyhalofop-butyl ester should be increased to more than 100 ml. Before the application, dry the field water, rehydrate and keep water for more than 5 days after application. (3) Remove three (removed later). Manually remove the weeds that are difficult to remove at the booting stage of rice.
The characteristics of weed occurrence (1) are numerous. Gramineous weeds include valerian, amaranthus, double-leaf garber, crabgrass, setaria, goosegrass, etc., sedge sedge, sedge, cattle felt, flat stalk, grass, firefly, wild pheasant Other broad-leaved weeds include ear-leaved leech, beakweed, knot-knot, broached gut, dwarf mushroom, and water peanut, among which gramineous weeds have a greater impact on rice yield. (2) Occurrence of early, more peaks of grass. In the wheat field, the weeds begin to germinate 3 to 5 days after the first drowning. Generally, there are two obvious grass peaks. The first peak appears in the 7-15 days after the nesting. Weeds, perennial sedges, and some broad-leaved weeds; the second peak occurs about 25 days after the harvest, and occurs mainly in annual sedges, most broad-leaved weeds, and a few grass weeds. (3) Large quantity and heavy damage. Although the total amount of grass weeds is not high in the previous period, it can quickly become a dominant species as the tillers or stolons grow and spread.
Causes of heavy grass damage (1) No-tillage. The rice fields in wheat are cultivated in a no-tillage manner. The weed seeds are mainly concentrated on the surface of the soil and the germination is not affected, and the residual grass in the wheat field is also easily revived. (2) alternating wet and dry. After the rice culturing, the wheat is allowed to alternate between wet and dry for a long time before the crop is allowed to bloom, which is beneficial to the sprouting of the weeds.
In addition to supporting technology (1) a kill (stem treatment). After the wheat is harvested, the seedlings are mastered in the 2 leaves of the seedlings from the 1st to the 3rd leaf stages, with 25 g/litre of Penoxsulam® oil suspension per acre, 60 ml, or 36% benzyl dichloride wettable powder 60~ 70 grams, add water 50 kg manual spray. Before the application, dry the field water, rehydrate and keep water for more than 5 days after application. When using the formulation of quincloracin, the seedlings must be in the 2 leaf 1 heart period to avoid phytotoxicity. (2) Second pick (mid-term pick governance). At the end of the rice tillering period, picking treatments were applied to the fields with large grasses (4 to 5 leaves), sedges, and broadleaf weeds. The use of 50 g of Penoxsulam Sulfochlor to 80 ml per acre, plus 60 kilograms of manual spray of water, controls alfalfa and some broad-leaved weeds and annual sedges. If there is more gold in the field and the age of the grass is larger (4 to 5 leaves), add 80 ml of 100 g/l of cyhalofop-butyl ester EC per acre. For more than 5 leaves of Qianjin, the amount of 100 gram per liter of cyhalofop-butyl ester should be increased to more than 100 ml. Before the application, dry the field water, rehydrate and keep water for more than 5 days after application. (3) Remove three (removed later). Manually remove the weeds that are difficult to remove at the booting stage of rice.
Digital 60m short range Laser Rangefinder is a laser measurement device which is supposed to replace tape measure, ruler, and other traditional length meauring tool. Laser ruler as its name, it is a electronic ruler which user laser to measure distance.
Our laser measurer has Multiply fuctions:
1. Height measure & Length measure &Distance measure
2. Area Measure
3. Volume Measure
4. Pythagorean Measure
60M Laser Measure，60M Laser Distance Measure，Laser Distance Measure Oem，60M Digitial Laser Distance Measure
Chengdu JRT Meter Technology Co., Ltd , https://www.jrt-measure.com