DESC:
Title: Novel Formulation of Thiamethoxam 3% & Buprofezin 25% WG

The present invention relates to an insecticidal composition, being the combination of two insecticides Thiamethoxam and Buprofezin, which works as synergistically enhanced activity against brown plant hopper, white backed plant hopper and green jassids.

In general the active components are being used as a tank mix when sprayed on rice crop individually, in immediate succession i.e. one after the other as may be necessary. However, the present invention is a mixture of the above two active components for attaining effective results due to novelty in formulation technology like selective composition , other ingredients and the manner by which formulation prepared and easily applied by the farmer in the Field Condition.

The protection of plants from plant pests which causes great and irreparable loss, damage, harm and injury to plants is essential for healthy growth of the plant and enhancement of agricultural produce.

With a view to combating and overcoming such problems, various chemicals and combinations or formulations thereof have been developed for the control and management of Insect pests.

Some of the commonly used conventional insecticides that are being used on rice Crop are not providing adequate control of brown plant hopper, white backed plant hopper and green Jassids on rice , thus finally resulting in hopper burn at the time of harvest. The grain obtained from such field is unfit for milling, resulted into broken grains and unfit for consumption.

Hence it was felt essential to study the bio efficacy of a combination formulation and have obtained efficacious resultant through combination of THIAMETHOXAM 3% + BUPROFEZIN 25% WG after a detailed study at various doses/combinations for effective management and compare its effectiveness with that of the existing recommended insecticides.

Thiamethoxam is a broad-spectrum, systemic insecticide, which means it is absorbed quickly by plants and transported to all of its parts through phloem, where it acts to deter insect feeding. An insect can absorb it in its stomach after feeding, or through direct contact, including through its tracheal system. The compound gets transferred between nerve cells by interfering with nicotinic acetyl cholinesterase receptors in the central nervous system, and eventually paralyzes the muscles of the insects.

Buprofezin has a novel mode of action, which inhibits moulting process of nymphs and ultimately leads to death. It is specifically used to control of Hemipteran insects. It also not harmful to beneficial insects and ideally suited for use in IPM programs. Active on all nymphal instars through contact activity and spray application must be carefully carried out to target specific insect pest. Usage should be based upon economic threshold level of pest observed in the field conditions.

To the extent known, Buprofezin 25 % SC is the insecticide used for the control of sucking pest of rice, cotton, chilli, mango and grapes particularly against plant hoppers, whiteflies, aphids, Jassids, thrips, mites, mealy bugs etc.

The present composition consists of two active components which belong to two different chemical family namely, Thiamethoxam which is a systemic insecticide in the class of neonicotinoids and Buprofezin which is a insect growth regulator belongs to Thiadiazine group.

The Combination of the individual components is chemically compatible with each other and acts as an insecticide. It works as a systemic as well as contact action as compared to individual chemical properties of Thiamethoxam and Buprofezin.

Surprisingly, it has been found that the two well known insecticides Thiomethoxam and Buprofezin exhibit an extremely enhanced insecticidal activity, when used as a mixture.

Not only is this activity of the composition is superior to that of individual components themselves, but also it is distinctly superior to the mere arithmetical aggregate thereof. Therefore, the composition is synergistic.

Hence, the present invention is new and original and constitutes a substantial contribution to enrichment of the state of art technology.

The combination of active components of Thiamethoxam and Buprofezin in this invention has a very useful activity by preventive and curative control of the insects with systemic and contact insecticidal properties for crop protection resulting in enhanced yields.

In the preliminary field trials of various combinations of Thiamethoxam and Buprofezin tested, it was found that Thiamethoxam3% and Buprofezin 25% WG was showing optimum results.

Study on Bio efficacy of Thiamethoxam 3%+ Buprofezin 25% Combination Product

The test was conducted to evaluate the BIO EFFICACY AND PHYTOTOXICITY of a Combination (synergy) formulation of THIAMETHOXAM 3% + BUPROFEZIN 25% WG for the management of brown plant hopper, white backed plant hopper, & green jassid on rice crop.

Materials and Methods used.

Trial Layout - as mentioned below:

i) Randomized Block Design : 3 Replications
ii) Plot Size : 8X5 Mtrs = 40 Sq. Mtrs.
iii) Treatments : As detailed below (9)

Details of Treatments:

A) THIAMETHOXAM 3% + BUPROFEZIN 25% WG @ 375 gm/ha (In 375 Lit of water/ha).

B) THIAMETHOXAM 3% + BUPROFEZIN 25% WG @ 450 gm/ha (In 375 Lit of water/ha).

C) THIAMETHOXAM 3% + BUPROFEZIN 25% WG @ 600 gm/ha (In 375 Lit of water/ha).

D) THIAMETHOXAM 3% + BUPROFEZIN 25% WG @ 750 gm/ha (In 375 Lit of water/ha).

E) THIAMETHOXAM 6% + BUPROFEZIN 25% WG @ 750 gm/ha (In 375 Lit of water/ha).

F) THIAMETHOXAM 25% WG @ 100 gm/ha (In 375 Lit of Water/ha).

G) BUPROFEZIN 25% SC @ 800 ml/ha (In 375 Lit of water/ha).

H) Chlorpyriphos 20 % EC @ 1250 ml/ha (In 375 Lit of water/ha).

I) Untreated Control.

The treatments are to be imposed based on Economic threshold level (ETL) of Brown plant hopper, white backed plant hopper and Green Jassids i.e. 4-10 nymphs/hill. However spraying of THIAMETHOXAM 3% + BUPROFEZIN 25% WG can be taken up if initial buildup of nymphal population is noticed early. The treatments are to be imposed at 50 days after transplanting (DAT) (or) as per the conditions prevailing in the field at the time of occurrence of the pest.

Items of Study was done with following:

i) Regular monitoring of Rice Crop for the incidence of brown plant hopper, white backed plant hopper and green Jassids were undertaken from 20 days of transplantation onwards and estimated insect population levels/hill.

ii) Treatments are to be imposed as indicated above based on ETL or at 50 DAT, or as per the conditions prevailing in the field level.

iii) Check the ratio of nymph development stage (1st , 2nd, 3rd , 4th , nymph instars and adult at the time of application.

Results Obtained:

1) No Phytotoxicity symptoms were observed after spraying.
2) There was a significant difference in control of BPH in the treatment -4 i.e. Thiamethoxam 3 % + Buprofezin 25 % WG @ 750gm/ha and found effective on brown plant hopper (BPH), white backed plant hopper( WBPH) & green jassids , when compared with other treatment combinations, Thiomethoxam solo , Buprofezin Solo and the other treatments imposed in the trial period i.e,

A) Thiamethoxam 6% + Buprofezin 25% WG @ 750 gm/ha.
B) Thiamethoxam 25% WG @ 100 gm/ha.
C) Buprofezin 25% SC @ 800 ml/ha.

3) The further multiplication of nymphal population after 10 and 15 days of treatment is found zero with the present combination formulation i.e Thiamethoxam 3% + Buprofezin 25% WG @ 750 gm/ha. Hence the present invention of combination formulation Thiamethoxam 3% + Buprofezin 25% WG @ 750gm/ha is found effective control against BPH, WBPH and green Jassids.
The results are tabled below.

Concentration Performance
a. b. c.
B Buprofezin 25% SC @ 800 ml/ha GC GC BC
T Thiamethoxam 25% WG @ 100 gm/ha BC GC GC
T Thiamethoxam 3 % + Buprofezin 25 % WG @ 750gm/ha VG VG VG

Note: BC – Bad; GC – Good; VG - Very Good;
a) BPH Control
b) WBPH Control
c) Green Jassid

The novel combination formulation Thiamethoxam 3% and Buprofezin 25% WG is also economical to the farmer as compared to the existing products available in the market against the control of brown plant hopper, white backed plant hopper, & green Jassids. As farmer prefers less no. of sprayings and hence reduces his investment on the targeted pest.

,CLAIMS:We claim,

1) A synergistic insecticidal composition for effective control of brown plant hopper, white backed plant hopper, & green jassids in rice crop, which consists of Thiamethoxam and Buprofezin,whereinthe said active ingredients are Thiamethoxam 3% and Buprofezin 25% WG along with any one or more selective ingredients from adjuvant, dispersing agents, wetting agents, stabilizing dye and filler(s) etc,.

2) A synergistic insecticidal composition as claimed in claim 1, wherein the composition is applied in rice crop on targeted pest at economic threshold level (ETL) of 4-10 nymphal instars/hill, to obtain effective desired control.

3) A synergistic insecticidal composition as claimed in claim 1, wherein combination formulation Thiamethoxam 3% and Buprofezin 25% WG has no Phytotoxicity on rice crop.