There are animals that destroy the crop before it is harvested. Farmers find it difficult to protect the crops from these animals, insects and microorganisms. Provide information to your classmates by answering the questions. (a) What are these animals/insects called? Name few that ruin the standing crops. (b) What methods do the farmers employ to protect their crops? (c) Name some common insecticides used to protect crops. (d) Write the difference between insecticide, pesticide, fungicide and rodenticide.
Answers
Answer:
MARK MY ANSWER AS BRAINLIEST PLEASE
Explanation:
(a)pests.
Example-rat,rodent.
These insects are called herbivorousinsects which are brought to task by spraying insecticides on them. Some ofthe deadliest bugs in this list are Stem Borer, Bollworm, Thrips, Pod suckingbugs, Rootborer, Weevil, Mealybugs, Berry Borer etc.
(b)The methods done by the farmers employee to protect their crops are:
- using pesticides like herbicides, insecticides etc
- .biological pest control approaches such as cover crops, trap crops and Beetle banks.
- barrier based approaches such as Agro- Textiles and Bird netting.
(c)Insecticide
- Chemosterilant.
- DDT.
- Benzene hexachloride.
- Aldrin.
- Malathion.
- Pesticide.
(d)Insecticide - These are the substances used to kill insects.Pesticide - Pesticide is a substance that is meant to control pests, including weeds. Rodenticides are the substances which are used to kill rodents.Fungicides are pesticides that kill or prevent the growth of fungi and their spores. They can be used to controlfungi that damage plants, including rusts, mildews and blights.
Answer:
When you grow crops in a field, you must have noticed that there are other plants and weeds growing alongside the crops. These are undesirable plants that rob the crops of their resources. They compete with the crops for sunlight, water and nutrients from the soil. This results in the crops being undernourished, which reduces the yield from the farm. To ensure the productivity of these plants, we remove these weeds by a process called weeding. The common weeds we usually find in farms are wild oats, grass, Amaranthus etc. There are various methods of weeding, some of which are
The traditional method of removing weeds by hand
Ploughing the field to remove the weeds even before sowing the seeds
Manually removing weeds using a trowel and harrow
Spraying chemicals on the weeds, and ensuring that such chemicals do not harm the actual crops.
Pesticides
The other most harmful factor for crops are the pests, insects, rodents etc that we find on a farm. These pests and rodents can destroy large portions of the crop plantation. Expert studies have found that all major crops like rice, cotton, wheat etc may lose around 22% of their yields to insects, rodents and pests. The most effective way to protect your crops against this threat is by spraying chemicals, called insecticides or pesticides.
There are also infections causing microorganisms in the soil that can also affect the crops. These bacteria, fungi etc can go through the whole crop cultivation in a matter of days. Crops have to protect against these by pesticides and biocontrol agents.
Harvesting of Crops
Once the crop has reached maturity, it now needs to be harvested. So harvesting is the cutting and gathering of the matured crop. The term harvesting also generally includes the immediate post-harvest practices such as threshing and winnowing. Let us look at both these processes
Threshing: The process of separating the grains from their chaffs or pods is threshing
Winnowing: After threshing, we must separate the grains from the chaffs. Winnowing is the process of separating the grains.
There are various factors to consider before the harvesting of crops. The crops need close examination to ensure that harvesting is not premature. This leads to shedding of seeds and loss of crop. And if the crops are overripened, they lose their value in the market or may even be unconsumable.
Harvesting in India is generally done manually. Sicles is a tool that is used to cut the crop. This method is a laborious and time-consuming and only suitable for small-sized farms. On larger farms, a harvester is used which combines harvesting with threshing and winnowing..ok pls mark as brainliest