Field evaluation of methoxyfenozide 24 SC against leaf miner, Aproaerema modicella (Deventer) and its effect on predatory coccinellids of groundnut

Abstract

The experiment on efficacy of methoxyfenozide 24 SC on leaf miner, Aproaerema modicella and its effects on coccinellids was conducted during kharif 2012 and rabi 2013 on groundnut variety, VRI 1. Among different doses of methoxyfenozide 24 SC (180, 210 and 240 g a.i/ha), chlorpyriphos 20 EC@225 g a.i/ha, lamda cyhalothrin 5 EC@15 g a.i/ha and dichlorvos 76 SC@750 g a.i/ha, the significant least incidence of Aproaerema modicella was recorded in methoxyfenozide @240ga.i./ ha(4.8%/plants) followed by methoxyfenozide@210 g a.i./ha (5.6%/plants) and methoxyfenozide@180 g a.i./ha (7.2%/ plants). Maximum population of coccinellids was recorded in the untreated check (3.4 nos./plant) followed by methoxyfenozide@180 g a.i./ha (2.9nos./plant),methoxyfenozide@210 g a.i./ha (2.8 nos./plant) and methoxyfenozide@240 g a.i./ha (2.7nos./plant).High pod yield was recorded in the plots treated with methoxyfenozide@240 g a.i./ha (3704.5 kg/ ha) followed by methoxyfenozide@210 ga.i./ha (3559.5 kg/ha) and methoxyfenozide @180ga.i./ha (3441.5 kg/ha).

Effect of Cassava-Legume Intercropping Systems on the Population Dynamics of Legumes Insect Pests in Three Major Agro-Climatic Zones of Sierra Leone

“…Assessment for groundnut leaf miner (Aproaerema modicella) commences from 40 days after planting and continued at an interval of 14 days for four consecutive times [19] since according to Namara [20], groundnut leaf miner peak infestation could occur during the reproductive stage. The groundnut leaf miner incidence which is expressed as percentage leaf damage was obtained by counting the total number of leaves showing folding and mining symptoms from 10 randomly selected plants per plot [21]. Severity of damage caused by groundnut leaf miner was recorded using a scale of 1-5; where 1 = no damage, 2 = 1-20% leaf damage, 3 = 21-40% leaf damage, 4 = 41-60% leaf damage and 5 = 61-100% leaf damage [22].…”

Influence of environment on soybean [Glycine max (L.) Merr.] resistance to groundnut leaf miner, Aproaerema modicella (Deventer) in Uganda

“…Other traits recorded were the number of larvae per plant, number of pupae per plant and seed yield per plot. The GLM incidence (expressed as percent leaf damage) was made by counting the total number of leaves showing folding and mining symptoms from 30 randomly selected plants (Pavviya and Muthukrishnan, 2017). The GLM severity was scored using the standard scale of 1-5 as described by Praveena et al (2011) in Table 2.…”