Explanation

• Locusts are migratory pests that can destroy vast areas of crops in a short time.
• They travel in swarms, feeding on almost all green vegetation.
• Considered one of the most disastrous agricultural pests worldwide.

Last verified on 03-02-2026

Explanation

• Wheat is affected by several diseases that reduce yield and quality.
• Common diseases include leaf blight, stripe smut, and rust.

Additional information:

• Leaf blight: Causes yellow/brown lesions on leaves, reduces photosynthesis.
• Stripe smut: Fungal disease producing black streaks on stems and leaves.
• Rust: Includes leaf rust, stem rust, and stripe rust; reduces grain quality and yield.

Last verified on 03-02-2026

Explanation

• Rapid necrosis in chickpea is caused by wilt, a fungal disease.
• The fungus infects the vascular system, blocking water and nutrient flow.
• Leads to sudden yellowing, wilting, and death of plants.

Last verified on 03-02-2026

Explanation

• Determinate growth means the plant grows to a certain size and then stops.
• In wheat, growth and development follow a fixed pattern with limited vegetative growth.
• This allows for synchronized flowering and harvesting.

Last verified on 03-02-2026

Explanation

• In legumes, nitrogen is applied entirely at the time of sowing.
• Legumes can fix atmospheric nitrogen through root nodules, so additional N is minimal.
• Proper nitrogen application supports early growth and improves yield.

Last verified on 03-02-2026

Explanation

• GNP (Gross National Product) measures the total economic output of a country including goods, services, and income from abroad.
• It accounts for domestic production plus net income from foreign sources.
• Useful for comparing the overall economic performance of nations.

Last verified on 03-02-2026

Explanation

• The total area of Pakistan is 881,913 km.²
• Forest has about 4.8% (5%) of the total land area.
• In Pakistan's hilly areas, about 40% forest comprises coniferous and scrub forests.
• The largest forest in Pakistan is Changa Manga.

Last verified on 03-02-2026

Explanation

• Norin 10 is a gene in wheat responsible for short stature (dwarfism).
• Shorter wheat plants are less likely to fall over (lodging) under high fertilizer use.
• This gene played a key role in the Green Revolution, increasing wheat yields worldwide.

Last verified on 03-02-2026

Explanation

• Cotton consists of seed and lint (fiber).
• On average, from 40 kg of raw cotton, 16 kg seeds and 24 kg lint are obtained.
• Lint is used for textile production, while seeds are used for oil extraction and animal feed.

Last verified on 03-02-2026

Explanation

• In cotton, jassid infestation causes stress, leading flowers to change color from white to pink.
• Jassids are small, sap-sucking insects that damage leaves and flowers.
• Early detection is important to prevent yield loss and maintain crop health.

Last verified on 03-02-2026