Woglum, R.S. 1943 Control of double-brooded black scale and purple scale in coastal districts.. The Exchange: Pest Control Circular No. 107: p. 1.
Notes: Chemical control recommendations are made for these two pests of orchards.
Woglum, R.S. 1943 Control of double-brooded black scale and purple scale in coastal districts.. The Exchange: Pest Control Circular No. 107: p. 1.
Notes: Chemical control recommendations are made for these two pests of orchards.