Which of the following group of compounds is produced by Streptomyces hygroscopicus?

Correct option is D

Explanation of the Correct Option (d): Milbemycin
· Streptomyces hygroscopicus is a soil actinomycete known for producing milbemycins.
· Milbemycins are:
· Macrocyclic lactone compounds
· Structurally related to avermectins
· They are widely used as:
· Antiparasitic agents
· Insecticides and acaricides
· Milbemycins are important in agriculture and veterinary medicine for controlling mites, nematodes, and insects.
Explanation of Other Options
Option (a): Tetranactin
· Incorrect because:
· Tetranactin is produced by Streptomyces aureus, not S. hygroscopicus.
Option (b): Avermectins
· Incorrect because:
· Avermectins are produced by Streptomyces avermitilis.
Option (c): Strobilurins
· Incorrect because:
· Strobilurins are fungal metabolites (originally from Strobilurus species), not from Streptomyces hygroscopicus.
Key Points Related to the Question
· Streptomyces hygroscopicus → Milbemycins
· Avermectins → Streptomyces avermitilis
· Strobilurins → Fungal origin
· Milbemycins are used as insecticides, acaricides, and antiparasitic compounds