Plant Pathology MCQ Question and Answer | Agriculture MCQ Question

Xiphinema index, Longidorus, and Trichodorus are the nematodes that act as vectors of plant viruses.
The only known nematode vectors are in the genera Xiphinema and Longidorus. Tobraviruses are straight tubular particles with two size ranges, 180 - 210 nm and 45 - 115 nm. Trichodorus and Paratrichodorus are vectors.
Nematodes acquire viruses by feeding on infected plants and transmitting them during subsequent feeding on non-infected plants.

Basidiospores type of spores of Puccinia graminis tritici infects the barberry plant.
Graminis tritici, the fungus causing stem rust of wheat, the haploid basidiospores can infect barberry but not wheat, and the haploid mycelium can grow only in barberry.
There the fungus produces structures called pycnia, and sexual reproduction occurs with cross-fertilization between two different mating types of pycnia. Then the fertilized fungus grows down through the barberry leaf.

Here, N₂-Amino acid, Fe-Cytochrome, and Mg-Chlorophyll are the correct combinations, whereas, Na-Protein is the wrong combination.
Sodium is not essential for the synthesis of protein. Nitrogen is one of the main body components, required for protein synthesis and production of several nitrogenous compounds such as hormones, neurotransmitters, and components of antioxidant defense.
Protein combining or protein complementing is a dietary theory for protein nutrition that purports to optimize the biological value of protein intake.

Fertilizers containing free acids should be packed in HDEP bags.
As these are water-resistant with poor air permeability, safe, and resistant to chemicals.
HDPE is High-density polyethylene, these are plastic bags are undoubtedly the most common in the world. The chemical composition of HDPE features long chains of straight molecules that are very linear from start to finish, HDPE polymers have minimal branching.

Nitrogen is applied in splits to Increase its efficiency.
Splitting Nitrogen into two applications allows the plant to utilize the N quicker and more efficiently.
A split nitrogen application allows you to hold back a significant portion of nitrogen until the plant is ready to utilize it. By reducing the amount of Nitrogen simply sitting in the soil, you prevent the potential for loss.

Heterodera is a Sedentary endoparasite.
Heterodera is a genus of nematodes in the family of Heteroderidae. The genus is unique among nematode genera because of the ability of the female to transform into a tough, brown, cyst that protects the eggs which have been formed within her body.
The cyst nematodes (Heterodera and Globodera) and root-knot nematodes (Meloidogyne) are sedentary endoparasites within a broad group of free-living and parasitic worms.

ATP formation during photosynthesis is Photophosphorylation.
Photophosphorylation is the conversion of ADP to ATP using the energy of sunlight by activation of PSII. This involves the splitting of the water molecule into oxygen and hydrogen protons (H⁺), a process known as photolysis.
All organisms produce a phosphate compound, ATP, which is the universal energy currency of life. In photophosphorylation, light energy is used to pump protons across a biological membrane, mediated by the flow of electrons through an electron transport chain.

To apply NPK, an NP complex has to be supplemented with Potash.
NPK (10 : 26 : 26) is a complex fertilizer that contains all three major nutrients 10% Nitrogen, 26% Phosphorous, and 26% Potash which are easily and quickly available to plants. Contain Phosphorous and Potassium in a 1 : 1 ratio.
Fertilizers are labeled N, P, or K to indicate their nutrient content in terms of nitrogen (N), phosphorus (P), and potassium (K). All three are important for plant growth.

Suicidal germination takes place In Striga.
Striga seedbank depletion can be achieved by suicidal germination, a strategy where the Striga seeds are stimulated to germinate in absence of a true-host plant.
In suicidal germination, parasitic weeds are germinated without a suitable host. In this way, before crop cultivation, weeds are died off.
Infestation by the parasitic plant Striga hermonthica is a severe threat to food security in sub-Saharan Africa, impacting the production of the major staple crops pearl millet and sorghum, equating to 7 - 10 billion $ losses.

Besides water and light which is more essential as a raw material for food formation CO₂.
Photosynthesis is a process used by plants and other organisms for the synthesis of food. This process converts light energy into chemical energy that, through cellular respiration.
Carbon dioxide is converted into sugars in a process called carbon fixation, photosynthesis captures energy from sunlight to convert carbon dioxide into carbohydrates.