50 Management of Coffee Leaf Miner: Spray Volume, Efficacy of Cartap Hydrochloride and Impact on Parasitism

Abstract

The leaf miner is a key pest of coffee and the use of insecticides for its control results in high water consumption. The objective in this study was to evaluate the quali-quantitative aspects of reduced spray volumes with and without the addition of adjuvant, the efficacy of the insecticide cartap hydrochloride in the control of the pest and its effects on the parasitism. Two experiments were carried out in coffee plantations in São Desiderio, BA. Initially, solution of Brilliant Blue tracer (0.15% p v-1) of the 43, 112, 146 and 309 L ha-1 volumes was sprayed with and without the soybean oil methyl ester adjuvant (0.25 % v v-1). Before spraying, water-sensitive cards were fixed to the plants and subsequently used for analyze the droplet spectrum in Gotas 1.0 software. The tracer deposit was determined by spectrophotometry. Posteriorly, the insecticide cartap hydrochloride (0.5 kg a.i. ha-1) was applied in the same volumes and types of spray used in the first test. Infestation rates of pest and parasitism were evaluated before and after application of the insecticide. The quali-quantitative aspects of the sprays were affected by the volume of spray applied, by the adjuvant and by the interaction of the factors. The intermediate volumes yielded better spraying quality without the presence of the adjuvante, with higher number and desity of drops. The spraying volume affected the depoisto the Brilliant Blue tracer in a linear and positive form. The efficacy of the insecticide was prolonged with the lowest volume spray and with adjuvant and its impact on parasitism varied with the volume applied and time after application.

Insecticide application rate in coffee crop: qualitative and quantitative aspects and efficacy of leaf miner control

“…For spray deposition levels, the model was positive line ar, which best explained the variations, with deposit in crements due to increased application rates (Figure 3). The se results were expected, since the spraying of larger sp ray volumes frequently results in larger deposits, as alre ady verified in coffee leaves (Rodrigues et al, 2012;Melo et al, 2019) and fruits (Miranda et al, 2012).…”

“…Beta-cypermethrin was classified as harmless at 15 DAA in all volumes, toxic at 30 DAA only at volume of 80.2 L ha -1 and moderately toxic at 28.1, 80.2 and 180.0 L ha -1 (Table 8). With regard to cartape hydrochloride, often used as a standard insecticide for the control of leaf miner, Melo et al (2019) observed reduction in parasitism using higher insecticide application rates (146 and 309 L ha -1 ) with the addition of adjuvant until 15 DAA in coffee cultivation in the western region of Bahia, which is considered toxic to pest parasites. However, these results are in disagreement with those observed in the study, as cartape hydrochloride is toxic at 15 DAA at lower application rates (28.1 and 80.2 L ha -1 ).…”

“…The use of spray equipment associated with different application rates (Miranda et al, 2012) have been of great relevance for coffee growers in controlling L. coffeella. Recent studies have indicated that it is possible to significantly reduce insecticide application rates to control leaf miner with conventional equipment, while maintaining good quality of applications and product efficacy (Miranda et al, 2013;Silva et al, 2014;Decaro Junior et al, 2015;Gitirana-Neto et al, 2016;Melo et al, 2019).…”

“…The variation in the application rate from 43 to 309 L ha -1 contributed significantly to the management of Neotropical leaf miner in the coffee tree in São Desidério, BA, Brazil (Melo et al, 2019). This work proposes to reduce on average 44% the application rates (28 to 180 L ha -1 ) and the use different insecticides for the management of this insect pest in coffee tree in Barra do Choça, BA, Brazil.…”

A Comprehensive Review of the Coffee Leaf Miner Leucoptera Coffeella (Lepidoptera: Lyonetiidae), With Special Regard to Neotropical Impacts, Pest Management and Control

“…Nowadays the chemical control of CLM is mandatory for the maintenance of coffee crops. There are some active ingredients available and the most efficient are thiamethoxan [2], chlorantraniliprole [40], cartap hydrochloride [41]. Studies on the stability of those products detected their presence in plants up to eight and six months after application, respectively.…”