Question

5. Why weedicide is used for ?​

Answer 1

Answer:

Weedicides are the chemicals which are sprayed over field to get rid of weeds. They will not show any effect on crop plants. Two popularly used weedicides are 2,4-D Ethyl ester, Neem extract, Glyphosate etc.

Answer 2

Explanation:

TOPIC:-

ᴡᴇᴇᴅɪᴄɪᴅᴇs

DEFINITION:-

ᴛʜᴇ ᴜɴᴅᴇsɪʀᴀʙʟᴇ ᴘʟᴀɴᴛs ᴛʜᴀᴛ ɢʀᴏᴡ ᴀʟᴏɴɢ ᴡɪᴛʜ ᴛʜᴇ ᴄʀᴏᴘs ᴀʀᴇ ᴄᴀʟʟᴇᴅ ᴡᴇᴇᴅs.

ᴛʜᴇ ᴘʀᴏᴄᴇss ᴏғ ʀᴇᴍᴏᴠᴀʟ ᴏғ ᴡᴇᴇᴅs ɪs ᴄᴀʟʟᴇᴅ ᴡᴇᴇᴅɪɴɢ. 

ᴡᴇᴇᴅs ᴄᴀɴ ʙᴇ ᴄᴏɴᴛʀᴏʟʟᴇᴅ ᴜsɪɴɢ ᴡᴇᴇᴅɪᴄɪᴅᴇs: ɪᴛ ɪs ᴀ ᴄʜᴇᴍɪᴄᴀʟ, ᴡʜɪᴄʜ ɪs sᴘʀᴀʏᴇᴅ ɪɴ ᴛʜᴇ ғɪᴇʟᴅs ᴛᴏ ᴋɪʟʟ ᴀʟʟ ᴀᴠᴀɪʟᴀʙʟᴇ ᴡᴇᴇᴅs. ᴡᴇᴇᴅɪᴄɪᴅᴇs ᴀʀᴇ ɴᴏᴛ ʜᴀʀᴍғᴜʟ ᴛᴏ ᴄʀᴏᴘs.

USE:-

ᴡᴇᴇᴅɪᴄɪᴅᴇs ᴡʜɪᴄʜ ᴀʀᴇ ᴀʟsᴏ ᴄᴀʟʟᴇᴅ ʜᴇʀʙɪᴄɪᴅᴇs ᴀʀᴇ ᴜsᴇᴅ ғᴏʀ ᴋɪʟʟɪɴɢ ᴠɪᴄɪᴏᴜs ᴡᴇᴇᴅs ᴛʜᴀᴛ ᴅᴇsᴛʀᴏʏ ᴄʀᴏᴘs.

EFFECTS:-

1) ᴛʜᴇʏ ɢᴇɴᴇʀᴀʟʟʏ ʜᴀᴠᴇ ɴᴇɢᴀᴛɪᴠᴇ ɪᴍᴘᴀᴄᴛs ᴏɴ ʙɪʀᴅ ᴘᴏᴘᴜʟᴀᴛɪᴏɴs, ᴀʟᴛʜᴏᴜɢʜ ᴛʜᴇ ɪᴍᴘᴀᴄᴛs ᴀʀᴇ ʜɪɢʜʟʏ ᴠᴀʀɪᴀʙʟᴇ. 

2) ғʀᴏɢ ᴘᴏᴘᴜʟᴀᴛɪᴏɴs ᴍᴀʏ ʙᴇ ᴀғғᴇᴄᴛᴇᴅ ɴᴇɢᴀᴛɪᴠᴇʟʏ ʙʏ ᴛʜᴇ ᴜsᴇ ᴏғ ᴡᴇᴇᴅɪᴄɪᴅᴇs ᴀs ᴡᴇʟʟ. 

3) ʟᴏɴɢ ᴛᴇʀᴍ ᴇxᴘᴏsᴜʀᴇ ᴏғ ᴡᴇᴇᴅɪᴄɪᴅᴇs ᴀʀᴇ ʀᴇsᴘᴏɴsɪʙʟᴇ ғᴏʀ ᴠᴀʀɪᴏᴜs ᴛʏᴘᴇs ᴏғ ᴄᴀɴᴄᴇʀs.

4) ᴛʜᴇʏ ᴄᴀɴ ᴘʟᴀʏ ᴀ ʀᴏʟᴇ ɪɴ sᴇx ʀᴇᴠᴇʀsᴀʟ ᴏғ ᴄᴇʀᴛᴀɪɴ ᴏʀɢᴀɴɪsᴍs ᴛʜᴀᴛ ᴇxᴘᴇʀɪᴇɴᴄᴇ ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇ-ᴅᴇᴘᴇɴᴅᴇɴᴛ sᴇx ᴅᴇᴛᴇʀᴍɪɴᴀᴛɪᴏɴ ʟᴇᴀᴅɪɴɢ ᴛᴏ ᴀʟᴛᴇʀᴀᴛɪᴏɴ ᴏғ sᴇx ʀᴀᴛɪᴏs.

ALSO REFER:-

https://brainly.in/question/3501475