Crop Protection Management Questions in English

(B) Preventive measures and biological control methods are preferred for crop protection because:
$1$. They minimize environmental pollution by reducing the reliance on harmful chemical pesticides.
$2$. They do not negatively affect the soil quality or fertility.
$3$. They are simple to implement and economically viable for farmers.
$4$. They maintain the ecological balance by targeting specific pests without harming beneficial organisms.

(N/A) The factors responsible for the loss of grains during storage are categorized into two main types:
$(i)$ Abiotic factors: These include environmental conditions such as moisture content (humidity) and temperature,which can lead to degradation,spoilage,and germination of stored grains.
$(ii)$ Biotic factors: These include living organisms such as insects,rodents (rats/mice),birds,mites,and microorganisms like bacteria and fungi,which consume or contaminate the stored grains.

(N/A) The main reasons for the losses of storage grains are abiotic and biotic factors.
The abiotic factors include: Moisture and temperature.
The biotic factors include: Insects,rodents,birds,mites,and bacteria.

(D) The use of large amounts of fertilizers and pesticides leads to the destruction of soil fertility,makes fields barren over time,and harms beneficial soil microorganisms. Therefore,they are not eco-friendly. Thus,option $D$ is the incorrect statement.

(B) Weeds are unwanted plants that grow in a cultivated field along with the main crop. They affect crop plants by competing for essential resources such as sunlight,water,nutrients,and space. This competition reduces the availability of these resources for the main crop,leading to stunted growth and reduced yield.

(N/A) Weeds are unwanted plants that grow along with the main crop and compete for nutrients,space,and sunlight. Various methods for weed control include:
$(a)$ Mechanical removal: This involves uprooting or cutting weeds manually or using simple tools like a trowel or hoe.
$(b)$ Proper seed bed preparation: Preparing the soil thoroughly before sowing helps in destroying existing weeds and their seeds.
$(c)$ Timely sowing of crops: Sowing crops at the right time ensures that the crop plants grow faster and shade the ground,preventing weed germination.
$(d)$ Intercropping and crop rotation: These agricultural practices disrupt the life cycle of weeds,making it difficult for them to establish themselves in the field.
$(e)$ Use of weedicides: Chemical substances specifically designed to kill weeds without harming the main crop.

(N/A) Following are the different modes by which insect pests affect the crop yield:
$(i)$ Cutting: Some insect pests cut different plant parts like leaves,fruits,and flowers,thereby damaging the plant. Damaged leaves result in a lower rate of photosynthesis,and damaged flowers lead to reduced seed production.
$(ii)$ Borers: Some pests bore into plant parts and live inside,such as stem borers or fruit borers. These pests consume the plant's resources.
$(iii)$ Suckers: Some pests use their specialized mouthparts (proboscis) to suck cell sap from various plant parts,weakening the plant.

(N/A) Pesticides are used in very accurate concentrations and in a very appropriate manner because,if used in excess,they:
$(a)$ Harm the soil and cause a loss of fertility.
$(b)$ Check the replenishment of organic matter.
$(c)$ Kill the beneficial micro-organisms of the soil.
$(d)$ Cause air,water,and soil pollution.

(N/A) The preventive measures for diseases in poultry birds include:
$(a)$ Proper cleaning and sanitation of poultry farms to maintain hygiene.
$(b)$ Regular spraying of disinfectants to eliminate pathogens.
$(c)$ Timely and appropriate vaccination of birds to build immunity against common diseases.
$(d)$ Providing clean drinking water and nutritious,uncontaminated feed.
$(e)$ Isolating sick birds to prevent the spread of infection to healthy ones.

(N/A)

Spraying	Fumigation
$(i)$ The process of applying pesticides in liquid form,either manually or by machines,is called spraying.	$(i)$ The process of using pesticides in gaseous or vapor form to control pests is called fumigation.
$(ii)$ Pesticides are used in larger volumes and are generally not applied directly to stored grains.	$(ii)$ Pesticides are used in smaller volumes and are applied directly to stored grains to eliminate pests.

(A) Preventive and control measures are used before grains are stored for future use.
These include strict cleaning of the produce before storage.
Proper drying of the produce is essential,first in sunlight and then in shade,to reduce moisture content.
Fumigation using chemicals that can kill pests is also employed to protect the stored grains.

(N/A) $(i)$ Mechanical removal: This involves using tools like harrows or hoes,or physical removal by uprooting or cutting weeds close to the ground.
$(ii)$ Preventive methods: These include proper seedbed preparation,timely sowing of crops,intercropping,and crop rotation to prevent weed growth.
$(iii)$ Tilling: Tilling the soil before sowing crops helps in uprooting and killing existing weeds.
$(iv)$ Biological control: This involves growing specific crops or using natural predators that compete with or inhibit the growth of weeds.

(N/A) $(i)$ Mixed cropping: Growing two or more crops simultaneously on the same piece of land is called mixed cropping.
For example: Wheat + gram, or wheat + mustard, or groundnut + sunflower.
$(ii)$ Intercropping: Growing two or more crops simultaneously on the same field in a definite pattern is called intercropping.
For example: Soybean + maize, or finger millet (bajra) + cowpea (lobia).
$(iii)$ Crop rotation: The growing of different crops on a piece of land in a preplanned succession is known as crop rotation.
For example: Growing two or more crops on a piece of land during a year to maintain soil fertility.

(N/A) $(i)$ The three main varieties of pesticides are herbicides,insecticides,and fungicides.
$(ii)$ The problems related to the excessive use of pesticides are as follows:
$(a)$ Pesticides contain toxic chemicals,and their excessive use poses significant health risks to living organisms.
$(b)$ It leads to various health issues such as abdominal disorders,respiratory problems,and skin allergies.
$(c)$ It causes environmental pollution,including soil and water contamination,which leads to long-term ecological hazards.

(N/A) $(i)$ They are called bio-pesticides.
$(ii)$ The purpose of using neem and turmeric is to protect stored grains from pests such as insects,rodents,fungi,mites,and bacteria.
$(iii)$ Herbicides are chemical substances used to remove or control weeds in cultivated fields during the early stages of crop growth.

(N/A) healthy animal feeds regularly and maintains a normal posture.
$(b)$ The characteristics of storage structures for grains are:
$(i)$ They should be properly cleaned and dried before use.
$(ii)$ They should be airtight to prevent moisture and pest entry.
$(iii)$ They should have outlets at different levels to facilitate the withdrawal of the required stock of grains.
$(iv)$ They should have pathways for periodic inspection,spraying,or fumigation.
$(v)$ They should have built-in arrangements for aeration,temperature control,and protection from pests.

(N/A) The three ways by which pests attack plants are:
$(i)$ They cut the root,stem,and leaf.
$(ii)$ They suck the cell sap from various parts of the plant.
$(iii)$ They bore into the stem and fruit.
$(b)$ The chemicals used to control pests are collectively known as pesticides (e.g.,insecticides,herbicides,or fungicides).
$(c)$ Excessive use of these chemicals should be avoided because:
$(i)$ They are toxic and can be harmful to non-target beneficial organisms,including humans and animals.
$(ii)$ They cause environmental pollution by contaminating soil and water sources.
$(iii)$ Pests may develop resistance to these chemicals over time,making them ineffective.

(N/A) Biotic factors (insects,rodents,fungi,mites,bacteria) and abiotic factors (inappropriate moisture,temperature,humidity) in stored grains cause the following issues:
$(a)$ Degradation in quality.
$(b)$ Loss in weight.
$(c)$ Poor germinability.
$(d)$ Discolouration of produce.
All these factors lead to poor marketability.
Control measures include:
$(a)$ Proper treatment: Using chemical or organic pesticides and drying grains thoroughly before storage.
$(b)$ Systematic management: Maintaining clean,dry,and well-ventilated warehouses with regular inspection.

(N/A) $(i)$ Pests attack plants in the following ways:
$(a)$ They cut the root,stem,and leaf of plants.
$(b)$ They suck the cell sap from various parts of the plant.
$(c)$ They bore into the stem and fruit.
$(ii)$ The chemicals used to control pests are collectively known as pesticides,which include insecticides,herbicides,and fungicides.
$(iii)$ Excessive use of these chemicals should be avoided because:
$(a)$ They are toxic and can be poisonous to many non-target plant and animal species.
$(b)$ They cause environmental pollution by contaminating soil and water sources.
$(c)$ They can accumulate in the food chain,leading to biomagnification.

(N/A) $(i)$ Unwanted plants that grow along with cultivated crops in fields are called weeds. Examples: $Xanthium$ (gokhru) and $Parthenium$ (gajar grass).
$(ii)$ Weeds compete with crop plants for essential resources like nutrients, space, water, and sunlight. By consuming these resources, they reduce the growth and yield of the main crop. Therefore, removing them during the early stages of crop growth is crucial to ensure the crop gets sufficient resources for a healthy harvest.
$(iii)$ Five preventive methods for weed control are:
$(a)$ Proper preparation of the seedbed.
$(b)$ Timely sowing of seeds.
$(c)$ Intercropping.
$(d)$ Crop rotation.
$(e)$ Summer ploughing.

(N/A)

Fumigant	Pesticide
$(i)$ It is used before grains are stored for future use.	$(i)$ It is used after the germination of seeds on standing crops.
$(ii)$ It is not sprayed over the crop plants.	$(ii)$ It is sprayed over the crop plants.

Dried leaves of the neem tree can be used as a natural substance in place of a chemical fumigant to protect stored grains from pests.

(N/A) The three methods to control the growth of weeds in agricultural fields are:
$1$. Intercropping: Growing two or more crops simultaneously in the same field in a definite row pattern,which helps in suppressing weed growth.
$2$. Crop rotation: Growing different crops in succession on the same land,which disrupts the life cycle of weeds.
$3$. Summer ploughing: Ploughing the field during the summer season exposes the roots of weeds to intense sunlight,causing them to dry out and die.

(N/A) Crop protection in fields: Field crops are infested by a large number of weeds, insects, and diseases. If these are not controlled at the appropriate time, they can damage the crops significantly, leading to major losses. Methods include:
$(i)$ Use of pesticides: Includes herbicides, insecticides, and fungicides sprayed on plants or used for seed/soil treatment.
$(ii)$ Weed control: Mechanical removal of weeds.
$(iii)$ Preventive methods: Proper seedbed preparation, timely sowing, intercropping, and crop rotation. Using resistant varieties and summer ploughing helps destroy pests and weeds.
$(B)$ Crop protection in storage:
Factors affecting stored grains include:
$(i)$ Biotic factors: Insects, rodents, fungi, mites, and bacteria.
$(ii)$ Abiotic factors: Moisture content, humidity, and temperature. These cause degradation in quality, weight loss, discoloration, and poor germination.
Control measures:
$(a)$ Strict cleaning of produce before storage.
$(b)$ Proper drying of produce in sunlight followed by shade.
$(c)$ Fumigation to kill pests.
$(d)$ Regular cleaning of warehouses and monitoring biotic factors.
$(e)$ Maintaining appropriate moisture and temperature levels in storage.

(B) Biological control methods should be preferred for protecting crops because:
$(i)$ They do not harm useful organisms,such as pollinators and natural predators of pests.
$(ii)$ They do not cause chemical poisoning of the stored food grains,ensuring the food remains safe for human consumption.

(B) Weeds are unwanted plants that grow in a cultivated field along with the main crop.
They affect crop plants primarily by competing for essential resources such as sunlight,water,space,and nutrients.
This competition reduces the availability of these resources for the main crop,leading to stunted growth and lower yields.
Therefore,option $B$ is the most accurate description of how weeds negatively impact crop production.

(D) When food grains are not stored properly,they are affected by both biotic factors (insects,rodents,fungi,mites,and bacteria) and abiotic factors (inappropriate moisture and temperature in the place of storage).
These factors lead to several negative outcomes:
$1$. Degradation in quality: The nutritional value and taste of the grains decline.
$2$. Discolouration: The grains lose their natural appearance and color.
$3$. Loss in weight: Biotic factors like insects and rodents consume the grains,leading to a reduction in total mass.
$4$. Poor germinability: The embryo within the seed may be damaged or killed,resulting in a lower percentage of seeds that can sprout when planted.
Therefore,all the listed options are correct consequences of improper storage.

(D) Before storing grains for future use,several preventive and control measures are essential to ensure their quality and prevent spoilage.
$1$. Proper cleaning: Removing debris,dust,and foreign particles prevents contamination.
$2$. Proper drying: Drying the produce first in sunlight and then in shade reduces moisture content,which inhibits the growth of fungi and bacteria.
$3$. Fumigation: Using chemicals to kill pests ensures that the stored grains remain free from insect infestation.
Since all these steps are standard practices for grain storage,the correct answer is $D$.

(N/A) The qualities shown by Sid's mother are:
$(i)$ Awareness: She is aware of the quality of food products.
$(ii)$ Responsibility: She knows her duties as a consumer and a citizen to demand quality goods.
$(iii)$ Health consciousness: She cares about the health and well-being of her family.
$(b)$ Control measures to prevent storage loss include:
$(i)$ Strict cleaning of the produce to remove debris and contaminants before storage.
$(ii)$ Proper drying of the produce,first in sunlight and then in the shade,to reduce moisture content.
$(iii)$ Fumigation: Using chemical substances that kill pests and insects to protect the stored grains.

(B) The use of large amounts of fertilizers and pesticides has several negative impacts on the environment and agriculture.
$1$. They destroy the soil fertility by altering the chemical composition of the soil.
$2$. They adversely affect the useful microorganisms and components present in the soil,which are essential for maintaining soil health.
$3$. Over time,the excessive use of these chemicals can lead to the degradation of land,eventually turning the fields barren.
$4$. Therefore,stating that they are 'eco-friendly' is incorrect,as they cause pollution and harm the ecosystem.