It has 48 suppliers and 1 consumer.
Suppliers:
Bug Catcher - Unlock by Scavenging (X3), Obsolete by Crop Rotation (X44)
All other 44 suppliers - Unlock by Sericulture (X26)/Gardening (X27)/Scavenging (X3), Obsolete by Agrichemicals (X75)
Some of them in addition to Silk in city vicinity they need one of following: Parrots, Bamboo, Kangaroo, Flax, Lobster, Almonds, Spices, Fish, Elephants, Pistachio, Coffee, Melons, Barley, Papaya, Corn, Indigo, Sugar, Wheat, Peyote, Resin, Dates, Shrimp, Rice, Incense, Cocoa, Murex, Mango, Cotton or Peyote+Tea.
Arboretum - Unlock by Botany (X58), Obsolete by Gaia Ecology (X116)
Lunar Bug Farm (SPACE) - Unlock by Lunar Manufacturing (X102)
Agroforest - Unlock by Environmental Economics (X107)
Agroforest produces Wood, Bamboo, Grass, Reeds and Straw too.
Consumers:
Entomology lab - Unlock by Zoology (X58), Obsolete by Biomimetics (X104)
Conclusion:
After Agrochemicals vast majority of producers are obsolete (midlife of consumer), but 1 valid consumer is here until end of life of this building.