nutritient deficiency

I think it is nutrient deficiency especially iron deficiency. Plant can't take iron nutrient when the soil pH is high. Apply compost and water the soil. Currently, you can also apply foliar fertilizer to quickly solve the deficiency problem.

Sucking pests or Minor nutrient deficiency. So, spray systemic insecticide like abamectin and thimethoxam. After 3 days, use minor nutrient (trace elements) by foliar fertilizer spraying.