hyacinth bean vine
The leaves on my vine are turning a yellowish green . I have sprayed with insecticidal soap. Was the the correct thing to do. Does this sound like a bug attacting the leaves?
Yellowing can be from spider mites or thrips. If using insecticidal soap, only use commercially made ones and always test it on the plant. Wait 3 days and check the test area for signs of problems. Please follow all instructions. Both thrips and spider mites are tiny and may require a magnifying glass to identify. Yellowing can also signal too much water and subsequent root rot. If your soil is clay and you've been getting lots of rain, this is possibly the problem. Hyacinth bean vine prefers to dry out between waterings. Here is an article on spider mites; https://www.gardeningknowhow.com/plant-problems/pests/insects/spider-mite-treatment.htm
and one on thrips. https://www.gardeningknowhow.com/plant-problems/pests/insects/controlling-thrips.htm