शीतोष्ण एवं शुष्क फल उत्पादन

In the class Arachnida (order Ixodida/Acari), the characteristic developmental life cycle of ticks progresses through: Egg -> 6-legged larva (seed tick) -> 8-legged nymph -> 8-legged adult.

• Egg -> 8 legged larvae -> 8 legged nymph -> 8 legged adult: Incorrect because tick larvae strictly possess only 6 legs (3 pairs).
• Egg -> 6 legged larvae -> 6 legged nymph -> 8 legged nymph -> 8 legged adult: Incorrect because all tick nymphs possess 8 legs.
• Egg -> 6 legged larvae -> 8 legged nymph -> 8 legged adult: Factually accurate developmental sequence of ticks.
• Egg -> 6 legged larvae -> 6 legged nymph -> 6 legged adult: Incorrect because adults have 8 legs.

Chagas disease (American trypanosomiasis, caused by the protozoan parasite Trypanosoma cruzi) is transmitted to humans through the infected faeces of blood-sucking Reduviid bugs (subfamily Triatominae, popularly termed kissing bugs or assassin bugs).

• Rat flea: Transmits bubonic plague and murine typhus.
• Hard Tick: Transmits Lyme disease, Kyasanur Forest Disease, and Rocky Mountain spotted fever.
• Reduviid bug: Proven biological vector of Chagas disease (Trypanosoma cruzi).
• Housefly: Mechanical vector of enteric diarrhoeal pathogens.

Japanese Encephalitis (JE virus, family Flaviviridae) is primarily transmitted in India and Southeast Asia by culicine mosquitoes, predominantly Culex tritaeniorhynchus and Culex vishnui breeding in flooded rice paddies.

• Culex mosquito: Primary vector of Japanese encephalitis and bancroftian filariasis.
• Aedes mosquito: Vector of dengue, chikungunya, and yellow fever.
• Anopheles mosquito: Vector of human malaria.
• Mansonia mosquito: Primary vector of Malayan filariasis.