Comparative toxicity of different insecticides to mango scale, Pulvinaria polygonata Cockerell.
Tandon P. L., Srivastava R. P.
Author Affiliation: Indian Institute of Horticultural Research, Bangalore 560006, India.
International Pest Control 22 : 158-159
Abstract : In laboratory studies in India on the toxicity of various compounds to adult females of Chloropulvinaria polygonata (Ckll.) (Pulvinaria polygonata), an important pest of mango there, especially in Uttar Pradesh, the scale-insects were placed on fresh mango leaves and sprayed under a Potter tower; mortality was recorded after 48 h. When the LC50 of formothion (which was 0.03266%) was given a value of 1, the relative toxicities of the other compounds were calculated to be 3.342 for phenthoate, 3.227 for parathion-methyl, 2.29 for monocrotophos, 1.754 for demeton-methyl, 1.545 for fenitrothion, 1.459 for phosalone, 1.164 for malathion, 1.15 for chlorpyrifos, 1.031 for thiometon and 1.037 for phosphamidon.