Protect your oasis with Captain Jack’s Rose Rx Insect & Disease Control Spray. This ready-to-use solution acts as 4 garden products in 1. Captain Jack’s Rose Rx is an effective biological fungicide, insecticide, miticide, and nematicide. Cold pressed neem oil is a naturally derived ingredient that is effective against insects, diseases and many other common garden issues. This product is approved for organic gardening and can be applied up to the day of harvest.