METHOD FOR CONTROLLING WEED

Abstract

The present invention relates to a method for controlling a glufosinate-resistant weed, including the step of: applying glufosinate or a salt thereof and at least one different herbicide to the glufosinate-resistant weed or a habitat of the glufosinate-resistant weed. According to the present invention, a method that exhibits an excellent control effect in weed control can be provided.

Claims

1. A method for controlling a glufosinate-resistant weed, comprising: applying glufosinate or a salt thereof and at least one different herbicide to the glufosinate-resistant weed or a habitat of the glufosinate-resistant weed.

2. The method according to claim 1, wherein the at least one different herbicide is selected from the group consisting of the following B-1 to B-11: B-1 acetolactate synthase inhibitors; B-2 acetyl-CoA carboxylase inhibitors; B-3 protoporphyrinogen IX oxidase inhibitors; B-4 4-hydrophenylpyruvate dioxygenase inhibitors; B-5 phytoene desaturase inhibitors; B-6 photosystem II inhibitors; B-7 very long chain fatty acid synthesis inhibitors; B-8 microtubule formation inhibitors; B-9 enolpyruvylshikimate 3-phosphate synthase inhibitors; B-10 auxin herbicides; and B-11 other herbicides; (including salts or derivatives thereof).

3. The method according to claim 1, wherein the habitat of the glufosinate-resistant weed is a cultivation area of a crop.

4. The method according to claim 3, wherein the crop is one selected from the group consisting of soybean, corn, cotton, rapeseed, rice, wheat, barley, sugarcane, sugarbeet, sorghum, and sunflower.

5. The method according to claim 3, wherein the crop is a crop to which tolerance to glufosinate or a salt thereof is imparted.

6. The method according to claim 2, wherein the habitat of the glufosinate-resistant weed is a cultivation area of a crop.

Description

EXAMPLES

[0186] Hereinafter, the present invention will be described with reference to Examples, but the present invention is not limited to these Examples.

[0187] First, evaluation criteria of herbicidal efficacy and phytotoxicity to crops shown in the following Examples are shown.

[0188] [Herbicidal Efficacy and Phytotoxicity to Crops]

[0189] For the evaluation of the herbicidal efficacy, the test weeds are classified into 0 to 100 as follows: the test weed having no or almost no difference in the state of emergence or growth at the time of the investigation as compared with the non-treated weed is classified into “0”, and the test plant that has completely died or has complete suppression of emergence or growth is classified into “100”.

[0190] For the evaluation of phytotoxicity to crops, when little phytotoxicity is observed, the evaluation is “harmless”, when slight phytotoxicity is observed, the evaluation is “small”, when moderate phytotoxicity is observed, the evaluation is “moderate”, and when strong phytotoxicity is observed, the evaluation is “large”.

Example 1

[0191] In a plastic pot, goosegrass, Italian ryegrass, bomugi and perennial ryegrass which are resistant to glufosinate, volunteer glufosinate-tolerant corn and volunteer glufosinate-tolerant soybean are seeded. Then, cultivation is performed in a greenhouse, and 10 days after seeding, foliar treatment is performed with 22 fluid ounce/acre (1.608 L/ha: 451 g/ha as glufosinate ammonium salt), 32 fluid ounce/acre (2.338 L/ha: 656 g/ha as glufosinate ammonium salt), or 43 fluid ounces per acre (3.142 L/ha: 881 g/ha as glufosinate ammonium salt) of Liberty (280 g/L glufosinate ammonium salt) and 1.4 weight ounce/acre (24.5 g/ha as chlorimuron-ethyl) of Classic (chlorimuron-ethyl). The spray liquid amount is 200 L/ha. After 14 days, an effective effect on the weeds is confirmed.

Example 2

[0192] The same procedures as in Example 1 are performed except that the goosegrass is changed to waterhemp, the Italian ryegrass is changed to redroot pigweed, the bomugi is changed to smooth pigweed, the perennial ryegrass is changed to Palmer amaranth, the volunteer glufosinate-tolerant corn is changed to volunteer glufosinate-tolerant cotton and the volunteer glufosinate-tolerant soybean is changed to volunteer glufosinate-tolerant rapeseed.

Examples 3 to 4

[0193] The same procedures as in Examples 1 to 2 are performed except that 1.4 weight ounce/acre of Classic is changed to 6 fluid ounce/acre (52 g/ha as clethodim) of Select Max.

Examples 5 to 6

[0194] The same procedures as in Examples 1 to 2 are performed except that 1.4 weight ounce/acre of Classic is changed to 2.5 weight ounce/acre (89 g/ha as flumioxazin) of Valor SX.

Examples 7 to 8

[0195] The same procedures as in Examples 1 to 2 are performed except that 1.4 weight ounce/acre of Classic is changed to 6 fluid ounce/acre (105 g/ha as isoxaflutole) of Balance Flexx.

Examples 9 to 10

[0196] The same procedures as in Examples 1 to 2 are performed except that 1.4 weight ounce/acre of Classic is changed to 300 g/ha of fluridone.

Examples 11 to 12

[0197] The same procedures as in Examples 1 to 2 are performed except that 1.4 weight ounce/acre of Classic is changed to 1 pound/acre (840 g/ha as metribuzin) of Sencor 75DF.

Examples 13 to 14

[0198] The same procedures as in Examples 1 to 2 are performed except that 1.4 weight ounce/acre of Classic is changed to 2 weight ounce/acre (119 g/ha as pyroxasulfone) of Zidua.

Examples 15 to 16

[0199] The same procedures as in Examples 1 to 2 are performed except that 1.4 weight ounce/acre of Classic is changed to 4 pint/acre (2130 g/ha as pendimethalin) of Prowl H2O.

Examples 17 to 18

[0200] The same procedures as in Examples 1 to 2 are performed except that 1.4 weight ounce/acre of Classic is changed to 32 fluid ounce/acre (1543 g/ha as glyphosate-potassium salt) of Roundup PowerMax.

Examples 19 to 20

[0201] The same procedures as in Examples 1 to 2 are performed except that 1.4 weight ounce/acre of Classic is changed to 43 fluid ounce/acre (881 g/ha as glufosinate-ammonium salt) of Liberty.

Examples 21 to 22

[0202] The same procedures as in Examples 1 to 2 are performed except that 1.4 weight ounce/acre of Classic is changed to 100 g/ha of cinmethylin.

INDUSTRIAL APPLICABILITY

[0203] According to the method for controlling a weed of the present invention, weeds can be efficiently controlled.