Effect of Novel Insecticide Molecules in Mulberry on Larval Parameters of Silkworm Bombyx mori L.

Yeshika, MP; Banuprakash, K. G.; Mohan, K. Murali; Vinoda, K. S.

doi:10.20546/ijcmas.2019.811.131

Cited by 3 publications

(4 citation statements)

References 2 publications

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“…Similarly, Kumar et al (2019) reported an extended larval duration when silkworms were fed on mulberry leaves treated with Azadirachtin 0.03 percent EC at 2mL/L on 15 DAS (215.33 h), 20 DAS (205.56 h), 25 DAS (190.00 h) and 30 DAS (184.00 h). Yeshika et al (2019) noticed that Azadirachtin one per cent at 1 mL/L caused the longest fifth instar larval duration at 10 DAS (221.83 h), followed by 20 DAS (220 h) and 40 DAS (217 h). In addition, Narayanaswamy et al (2017) noticed an increase in fifth instar larval duration when silkworms fed with mulberry leaves treated with 4 percent NSKE.…”

Section: Fifth Instar Larval Durationmentioning

confidence: 94%

Effect of Feeding Pesticides Sprayed Mulberry Leaves on Rearing Parameters of Silkworm

2024

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A bioassay study was conducted to test the effect of feeding pesticides sprayed mulberry leaves on silkworms. The pesticides that are used to control mulberry pests were selected with the recommended dose as per the label claim and were sprayed on mulberry plants and fed to silkworms (FC1) at 5, 10, 15 and 20 days after spraying (DAS) to know their impact on the growth of silkworms. The results revealed that among the five pesticides tested, Azadirachtin 1 per cent (2 mL/L) and Chlorfenapyr 10 SC (1.5 mL/L) were highly toxic to silkworms with maximum larval mortality of 100 and 23.5 per cent even at 10 days after spray, but less toxic at 15 days after spray, respectively. However, the pesticide Orgomite (2.5 mL/L) a botanical formulation recorded the least mortality of silkworm (7.83%) at 10 days after spray. Whereas, the pesticides Wettable Sulphur 80 WP (2 g/l) and Era Safeguard (2.5 mL/L) at 10 DAS recorded less mortality of 8.30 and 17.25 per cent, respectively. Similar trends were recorded with regard to the rearing parameters of silkworms. The findings of the current study have clearly shown that the Orgomite which is a botanical formulation was proved to be the least toxic to silkworms even at 10 DAS followed by Wettable Sulphur 80 WP, Era Safeguard, Chlorfenapyr 10 SC and Azadirachtin 1 per cent at 15 DAS. Thus, Orgomite and Chlorfenapyr 10 SC were found best for the management of both mites and leaf roller with a safety period of 10 and 15 days after pesticide spray, respectively.

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Section: Fifth Instar Larval Durationmentioning

confidence: 94%

Effect of Feeding Pesticides Sprayed Mulberry Leaves on Rearing Parameters of Silkworm

2024

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“…The chemical molecules belonging to the group of macrocyclic lactones like emamectin benzoate 5% SG [13] biological molecules like spinosad 48 SC at 100g a.i./ha [14] and neonicotinoids like thiamethoxam 0.2 ml/lit were found toxic reporting highest larval mortality in silkworms even after 48-72 hours of spray and upto 50 DAS. The pyridine organic compounds like flonicamid 50 WG at 0.3 g/lit [15], ryanoid class of molecules like chlorantraniliprole and new generation green insecticide flubendiamide [16] belonging to the class diamides also recorded 93-100 per cent mortality in silkworms due to persistent toxicity in the mulberry leaves even after 10 DAS of pesticides. However, Narayanaswamy et al [17] reported lowest larval mortality (2.11 %) upon feeding silkworms with NSKE (4%) treated mulberry leaves on 22 nd day after spray.…”

Section: Larval Mortality (%)mentioning

confidence: 99%

“…The altered physiology might result in extended larval duration [28]. The chemicals such as dimethoate and methyl parathion [29] and many such insecticides [16,15] prolong the instar duration when silkworms are fed with treated mulberry leaves harvested at different days after spray.…”

Section: Total Larval Duration (Days)mentioning

confidence: 99%

Assessing the Impact of Abamectin and Diafenthiuron on Silkworm Larval Growth and Survival

N M,

K S,

K G

et al. 2024

Asian Res. J. Agric.

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An experiment was conducted primarily to evaluate chemicals exhibiting dual insecticidal and acaricidal properties, with a specific focus on their compatibility with silkworms and indigenous natural predators within the mulberry ecosystem, to evaluate abamectin 1.9% EC and diafenthiuron 50% WP for safety period on mulberry silkworm, Bombyx mori L. (Jan-Feb and Mar-April 2023) where in the pesticides were sprayed on mulberry at different durations, after spray were fed to the silkworms from third instar onwards. There was no mortality (0.00%) of silkworm observed in the treatments during two seasons and the larval progression 100% during third, fourth and fifth instars. The total larval duration was found shortest when the silkworms were fed with mulberry leaves harvested from the plots sprayed with abamectin 1.9% EC at 0.75ml/lit (22.30 and 23.22 days) and diafenthiuron 50% WP at 1 g/lit (22.77 and 23.07 days) at 15 and 21 DAS, respectively. The larval weight was significantly maximum in the treatments with abamectin 1.9% EC at 0.75 ml/lit (4.29 and 4.08 g/larvae) and diafenthiuron 50% WP at 1 g/lit (4.17 and 4.06 g/ larvae), respectively at 15 and 21 DAS. The Effective Rate of Rearing (ERR %) was found highest with diafenthiuron 50% WP at 1 g/lit (97.78 and 96.67 % at 15 and 21 DAS) and abamectin 1.9% EC at 0.75 ml/lit (97.78 and 96.67 % at 15 and 21 DAS) that was comparable with control. The molecules, diafenthiuron 50% WP at 1 g/lit and abamectin 1.9% EC at 0.75 ml/lit were found safer to silkworms at 15 and 21 DAS in terms of survival and larval growth.

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“…When mulberry pests attack only a small part of the crop, then it is better not to perform any chemical treatments that could negatively affect silkworm rearing. It is a species particularly sensitive to toxic compounds, resulting in very restrictive methods of cultivating mulberry (Yeshika et al 2019). While agrotechnical practices within the cultivation area can be tightly controlled, chemicals used in adjacent areas can easily be transported through the air and even with the groundwater.…”

Section: Introductionmentioning

confidence: 99%

Journal of Plant Protection Research

Fajfer,

Łochyńska

2022

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The paper describes the impact of two different plant protection products on silkworm (Bombyx mori L.) development. These products are commonly used in agrotechnical treatments and are officially allowed to use in ecological agriculture. They are also fungicides, which suggests lower negative impact on other groups of organisms. The two used products were Biosept Active Spray (grapefruit extract) and Miedzian 350 SC (copper oxychloride) which were sprayed on mulberry leaves used to feed silkworms from the beginning of the 4th instar. As to measure the level of impact, the mortality of larvae (percentage of dead specimens) and cocoon shell ratio (percentage of shell weight in whole cocoon) were checked. The highest mortality was recorded in the group treated with 0,7% Miedzian solution (92,5%) as well as the lowest shell ratio (12,06) comparing to the control group (mortality 7,5% and shell ratio 17,43). In the Biosept group, no significant mortality was recorded (comparing to the control group) but mean shell ratio showed a significant decrease in the cocoon quality. The study shows that one of the pesticides is highly effective against a non-target organism.

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Effect of Novel Insecticide Molecules in Mulberry on Larval Parameters of Silkworm Bombyx mori L.

Cited by 3 publications

References 2 publications

Effect of Feeding Pesticides Sprayed Mulberry Leaves on Rearing Parameters of Silkworm

Effect of Feeding Pesticides Sprayed Mulberry Leaves on Rearing Parameters of Silkworm

Assessing the Impact of Abamectin and Diafenthiuron on Silkworm Larval Growth and Survival

Journal of Plant Protection Research

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